微细通道内液氮流动沸腾热物理特性与机理的可视化研究
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
微细通道内的相变换热由于结构紧凑,换热效率较高,在电子、航天、生物医学等现代高新技术领域有广泛的应用,对其规律的研究也成为国际传热界的热点。本文针对微型医疗器械,超导磁体冷却等应用中涉及的微细通道内液氮的流动沸腾,采用高速摄像从微观层面上对其热物理特性与机理进行了深入的研究,并对相变过程中气泡动力学特征以及对应换热特性进行了数值模拟。主要结论如下:
     开展了实验难度较大的低温流动与传热的可视化研究工作,解决了低温条件可视化实验中布光和放大倍率的难题,获得了高质量的流型图片。微细通道内液氮流动沸腾的主要流型为:泡状流,弹状流,搅拌流和环状流;并且在1.042 mm和0.531 mm管内发现了受限气泡流。绘制了流型图,结果表明表面张力是影响流型转变的重要物性参数。相对于空气-水的流型图,弹状流区域很小,对应的弹状流/搅拌流,搅拌流/环状流流型转变线向较低的气体表观速度方向移动;而泡状流/弹状流的转变线向较高的气体表观速度方向移动。
     为了深入研究微细通道内液氮流动沸腾的机理,在微细玻璃管外表面电镀一层透明的加热膜(氧化锡铟)用来研究气泡核化,脱离等气泡动力学特征和流型转变过程。微细玻璃管的内径为1.3-1.5 mm。测量了气泡脱离直径以及气泡周期,满足关系式( D_d )~(1.46)·(1/τ)=constant,说明微细通道内的气泡脱离特征更类似于常规通道。微细通道内气泡脱离后流型的转变则受到明显的微尺度效应的影响,气泡生长受限,流型转变加快,换热系数增大。研究了微细通道内不同流型的换热系数,包括泡状流,弹状流,环状流以及倒流和干涸。结果表明微细通道内流动沸腾的主导机理是液膜蒸发。发生干涸时,换热恶化,而倒流能在一定程度上增强上游的换热系数。研究了干涸之后的流型发展过程,观测到了反泡状流,反弹状流以及反环状流等流型。发现并详细描述了微细通道内的液滴夹带现象,不同于常规通道,这种液滴夹带较多的发生于弹状流中。
     一般的可视化实验得到的结果只能反映二维平面上的信息,而带来三维空间上诸多重要信息的缺失。而常规尺度的三维可视化方法由于工作距离上的限制,很难应用于微尺度的三维可视化实验中。本文创造性地提出一种简洁有效的适应于微尺度成像的三维可视化光路,成功实现了微细通道内两相流动的三维可视化。该方法在实验段周围特定的位置设置一片等腰直角棱镜和一面平面镜,由此实现了一个相机同时获取两相流的正面像和侧面像。在此基础上实现了三维重建。同时对由于折射以及棱镜色散而带来的图像变形进行了定量分析,并提出了矫正方法。尽管该方法的验证实验针对可视化难度大的低温流体进行,但是同样适用于微细通道内常温流体的可视化研究。
     在实验研究基础上,本文对微细通道内气泡动力学特征以及对应的换热特征进行了数值研究。采用Volume-of-Fluid(VOF)模拟,将计算区域划分为主流区域和微液膜区域,采取不同的质量和能量源项来模拟相变过程。采用了一种简单的微液膜模型,实现了微液膜层内的传热传质过程。成功模拟了微细通道内气泡的核化生长过程。同时系统研究了流量等参数?物性?几何特征等因素对气泡生长以及对应的换热特性的影响。发现在较高流速下,气泡生长表现出线性规律;而流速较低时,生长曲线表现抛物形的特点。分析了热流密度对气泡生长的影响,在微细通道内气泡生长的主导机理为热控制机理。热物性如表面张力?接触角以及液气密度比对气泡生长以及流型转变有显著影响。对于小表面张力和接触角的流体,核态沸腾时气泡较容易脱离加热表面。当液气密度比增大时,气泡生长速率较快。气泡生长受到壁面限制时,换热系数增强。模拟分析了受限气泡的产生发展过程,结果表明受限气泡的换热影响区域约为受限气泡大小的两倍;受限气泡能够显著增强影响区域内的换热系数。
     系统研究了以不锈钢为基材的微通道热沉内液氮流动沸腾的流型特征和换热特性。通过高速摄像,获取的主要流型为泡状流,弹状流和环状流,发现不稳定倒流现象严重。在流量为50.1-880.5 kg/m~2s范围内,最大换热能力达到21.35 W/cm~2,增加热沉通道深度能够显著增加换热能力。测量了各个微细通道间的流量分配。发现单相条件下,各通道间的流量分配基本一致,两相流条件下,各通道间的差别较大,而且随着流速的增加,不均匀性增强。在本文的实验范围内,各通道间最大的流量差别约为18%。研究了各个通道在不同流型条件下的压降特性。发现在单相流动条件下,各通道的压降曲线基本重合在一起,进入两相状态后,在波动相位和幅度上,各通道逐渐出现偏移,甚至反相。
Flow boiling heat transfer in mini/micro-channels has attracted a great deal of attention in the past a few years due to the various applications in electronics, astronautics, medical treatment, etc. With the aid of high-speed photography, the present study aims to uncover the physical mechanism of convective boiling of liquid nitrogen in mini/micro-channels. Moreover, numerical simulation of the bubble dynamics is developed to further understand the phase change phenomenon in mini/micro-channels. The main conclusions are shown below:
     Successfully solving the two difficulties in cryogenic visualization, i.e., illumination and magnification, the present study set up the visualization system for micro-scale two-phase flow in cryogenic temperature. It was found from the experimental results that the flow patterns were mainly bubbly flow, slug flow, churn flow and annular flow. And the confined bubbles and mist flow were also observed in micro-tubes of 1.042 mm and 0.531 mm in inner diameters in the experiments. Compared with flow regime maps for gas-water flow in tubes with similar hydraulic diameters, the region of slug flow in the present study reduces significantly. Correspondingly, the transition boundary from the bubbly flow to slug flow shifts to higher superficial gas velocity, and the transition line of churn to annular flow moves to lower superficial gas velocity.
     To explore the mechanism of flow boiling of liquid nitrogen in mini/micro-channels, it employed a segment of upward vertical quartz glass tube with the inner diameter range of 1.3-1.5 mm, which was coated with a layer of transparent ITO film (Indium Tin Oxide) as the heater on the outer surface. The bubble growth, departure and the following flow pattern evolution in the micro-tube were visualized and quantitatively investigated, along with the simultaneous measurement of local heat transfer coefficient around a specified nucleation site. The bubble departure diameter and bubble period were investigated and satisfy ( D_d )~(1.46)·(1/τ)=constant, which showed that the tube size of the micro-tube had no notable effect on the bubble departure and the trend of the bubble departure was similar to that in macro-tubes. Whereas the following flow pattern evolution was apparently confined due to the size effect, which presented the acceleration of flow pattern transition and desirable heat transfer performance in micro-tubes. The heat transfer coefficients for different flow patterns along the micro-tube were obtained in terms of bubbly, slug, annular flow and the flow regimes of flow reversal and post-dryout. It was found that the dominant heat transfer mechanism was the liquid film evaporation which offered desirable heat transfer capability. The heat transfer performance would be deteriorated in the post-dryout regime, while flow reversal could somewhat enhance the heat transfer upstream of the nucleation site. Flow pattern evolution beyond the boiling crisis was also investigated. Post-dryout regimes such as inverted bubbly, inverted slug and inverted annular flow were observed in the micro-tube. Flow reversal and liquid entrainment, which were relevant to flow instability in the flow pattern evolution, was demonstrated clearly. Other than macro-channels, the liquid entrainment usually occours in slug flow in mini/micro-channels.
     Flow pattern visualization is essential for understanding the mechanism of two-phase flow in the micro-scale passages like micro-tubes and micro-channels, etc. However, the front view of the two-phase flow is the only information obtained in the most flow pattern visualization researches in micro-scale passages, so far. The two-dimensional images can only provide partial information and sometimes important information such as the bubble nucleation sites, bubble shapes and spatial distribution of the bubbles, which could provide an in-depth understanding of two-phase flow, are missed or not accurately obtained. Due to the limitation of the working distance of the conventional visualization system, it is very difficult for applying the conventional three-dimentional photography method for the visualization of the two-phase flow in mini/micro-channels. The present study proposed a simple but effective method to visualize the two-phase flow in mini/micro-channels three-dimensionally, which was validated by the difficult experiment in the cryogenic temperature and could be extended to the flow condition in room temperature. An isosceles right-angle prism combined with a mirror located 45°bevel to the prism was employed to obtain synchronously the front and side views of the flow patterns with a single camera, where the locations of the prism and the micro-tube for clearly imaging should satisfy a fixed relationship which was specified in the present study. The image deformation due to refraction and chromatic aberration due to the prism were clearly specified and corrected.
     Numerical simulation was conducted to clarify the flow boiling process in micro-tubes by using Volume-of-Fluid (VOF) method which was modified to include the effect of phase change. A specially treated micro-layer model was used, in which the evaporative heat flux through the micro-layer was approximated in the simulation. The effect of heat flux, mass flux, surface tension force, contact angle and channel size on the bubble growth and heat transfer were analyzed. It was found that the bubble growth rate displayed linear trend in relatively high flow rate, while the bubble growth curve shaped parabolic under low flow rate. The effect of heat flux on the bubble dynamics was specified and it showed that the controlled mechanism of bubble growth during flow boiling in micro-tubes was thermally controlled mechanism. The thermal properties such as surface tension, contact angle and density ratio played significant role in the bubble growth and the following pattern evolution. For the working fluid with small surface contact angle and surface tension, the vapor bubble departed from the heating wall easily in the nucleate boiling. Bubble growed fast as the liquid-vapor density ratio increased. The confined bubble occurred and the corresponding heat transfer performance was enhanced as the channels size reduces. The influential region of the confined bubble was specified, which covered more than two-fold area of the confined bubble and could heavily influence the region upstream of the confined bubble.
     The experimental study was performed on the convective boiling of liquid nitrogen through stainless steel heat sink. Heat transfer characteristics and associated flow patterns were quantified. The appearing typical flow patterns in the micro-channel heat sink were bubbly, slug and annular flow, as well as flow reversal. The greatest heat capability was up to 21.35 W/cm~2 in the flow rate range of 50.1-880.5 kg/m~2s. The maldistribution of mass flux in each channels of the heat sink was investigated and it was found the maximum difference was around 18% in the present experimental range. Moreover, the maldistribution of mass flux in each channel became apparent as the flow rate increases. The pressure drop characteristics of different channels for different flow patterns were experimentally investigated. It was found that the pressure drop curves almost overlapped for single liquid phase. Whereas the curves diversified as the flow enters into two phase, even out of phase with each other in some cases.
引文
[1]陈国邦等,新型低温技术,上海:上海交通大学出版社.
    [2] Y.F. Fan, L.H. Gong, X.D. Xu, et al., Cryogenic system with the sub-cooled liquid nitrogen for cooling HTS power cable, Cryogenics 45 (2005) 272-276.
    [3] G. Onik, Critical reviews in Oncology/Hematology, Cryosurgery 23 (1996) 1-24.
    [4] A. A. Gage, J. Baust, Mechanism of tissue injury in cryosurgery, Cryobiology 37 (1998) 171-186.
    [5] J. Dooley, R.P. Hammond, The cryogenic nitrogen automatic engine, Mech. Eng. 10 (1984) 66-73.
    [6]元广杰,液氮发动机理论与实验研究,浙江大学博士论文, 2004.
    [7]吴裕远,陈流芳,最新低温技术“类环状流微膜蒸发板翅式冷凝蒸发技术”成果介绍,中国科学基金16 (6) (2002) 348-350
    [8] U.S. Choi, C.S. Rogers and D.M. Mills, High performance microchannel heat exchanger for cooling high heat load X-ray optical elements, ASME Winter Annual Meeting, Anaheim, CA, November 8-13, 1992.
    [9] S.L. Qi, P. Zhang, A.L. Zhang, et al. In Performance evaluation of novel liquid nitrogen cryoprobe, IEEE Engineering in Medicine and Biology 27th Annual Conference, Shanghai China, 2005; pp 486-490.
    [10] B. Renard, A. Martinez, L. Duchateau, et al., Evaluation of thermal gradients and thermosiphon in dual channel cable-in-conduit conductors, Cryogenics 46(9) (2006) 629-642.
    [11] B. Renard, A. Martinez, L. Duchateau, et al., Transverse heat transfer coefficients on a full size dual channel CICC ITER conductor, Cryogenics 46 (7-8) (2006) 530-540.
    [12]过增元,国际传热研究前沿-微尺度传热,力学进展30(1) (2003) 1-6.
    [13] S.G. Kandlikar, Fundamental issues related to flow boiling in minchannels and microchannels, Exp.Therm. Fluid Sci. 26 (2001) 389-407.
    [14] S.L. Qi, P. Zhang, R.Z. Wang, et al., Flow boiling of liquid nitrogen in micro-tubes: Part I - The onset of nucleate boiling, two-phase flow instability and two-phase flow pressure drop, International Journal of Heat and Mass Transfer 50 (25-26) (2007) 4999-5016.
    [15] S.L. Qi, P. Zhang, R.Z. Wang, et al., Flow boiling of liquid nitrogen in micro-tubes: Part II - Heat transfer characteristics and critical heat flux, International Journal of Heat and Mass Transfer 50 (25-26) (2007) 5017-5030.
    [16]郭烈锦等,两相与多相流动力学,西安:西安交通大学出版社, 2002.
    [17] W.B. Bald, B.A. Hands, Cryogenics heat transfer research at Oxford, part 2—flow boiling, Cryogenics 14 (4) (1974) 179-197.
    [18] S.G. Kandlikar, Two-phase ?ow patterns, pressure drop and heat transfer during boiling in minichannel and microchannel ?ow passages of compact heat exchangers. In: Compact Heat Exchangers and Enhancement Technology for the Process Industries-2001, Begell House, New York, pp. 319-334.
    [19] T. Harirchian, S.V. Garimella, The critical role of channel cross-sectional area in microchannel flow boiling heat transfer, Int. J. Multiphase Flow 35 (2009) 904-913.
    [20] P. Kew, K. Cornwell, Correlations for prediction of boiling heat transfer in small diameter channels, Appl. Therm. Eng. 17 (1997) 705-715.
    [21] R. Mertz, A. Wein, and M. Groll, Experimental investigation of flow boiling heat transfer in narrow channels, Calore Technol. 14 (1996) 47-54.
    [22] J.R. Thome, Boiling in microchannels: a review of experiment and theory, Int. J. Heat Fluid flow 25 (2004) 128-139.
    [23] O. Baker, Simultaneous flow of oil and gas, Oil and Gas Journal 53 (1954) 185-195.
    [24] J.M. Mandhane, G.A. Gregory, K. Aziz, A flow pattern map for gas liquid flow in horizontal pipes, Int. J. Multiphase Flow 1974 (1) 537-553.
    [25] G.F. Hewitt, D.N. Roberts, Studies of two-phase flow patterns by simultaneous X-ray and flash photography, Report AERE-M 2159, 1969, Harwell
    [26] Y. Taitel, A.E. Dukler, A model for predicting flow regime transitions in horizontal and near horizontal gas-liquid flow, AIChE J. 22 (1976) 47-55.
    [27] Y. Taitel, D. Barnea, A.E. Dukler, Modeling flow pattern transitions for steady upward gas-liquid flow in vertical tubes, AIChE J. 26 (1980) 345.
    [28] K. Mishima, M. Ishii, Flow regime transition criteria for upward two-phase flow in vertical tubes, Int. J. Heat Mass Transfer 27 (1984) 723.
    [29] F.C. Gunther, Photographic study of surface-Boiling heat transfer to water with forced convection, Transactions of ASME, Series C, Journal of Heat Transfer 73 (1951) 115-123.
    [30] M.S. Plesset, and S.A. Zwick, The growth of vapor bubbles in superheated fluids, J. Appl. Phys. 25 (1954) 474–478.
    [31] H.K. Forster, and N. Zuber, Growth of a vapor bubbles in superheated liquid, Appl. Phys., 25 (1954) 474–478.
    [32] S.G. Bankoff, Entrapment of gas in the spreading of a liquid over a rough surface, AIChE J. 4 (1958) 24–26.
    [33] Y.Y. Hsu, and R.W. Graham, A visual study of two-phase flow in a vertical tube with heat addition, NASA Technical Note D-1564, 1963.
    [34] C.H. Han, and P. Griffith, The mechanism of heat transfer in nucleate pool boiling- Part I Bubble initiation, growth and departure, Int. J. Heat Mass Transfer 8 (1965) 887–904.
    [35] Y.P. Chang, Some possible critical conditions in nucleate boiling, ASME J. Heat Transfer 85 (1963) 89-100.
    [36] L.M. Jiji, and J.A. Clark, Bubble boundary layer and temperature profiles for forced convection boiling in channel flow, Journal of Heat Transfer 86 (1964) 50-58.
    [37] M.G. Cooper, The microlayer and bubble growth in nucleate pool boiling, Int. J. Heat Mass Transfer 12 (1969) 915-933.
    [38] S. Levy, Forced convection subcooled boiling– Prediction of vapor volumetric fraction, Int. J. Heat Mass Transfer 10 (1967) 951-965.
    [39] B.B. Mikic, W.M. Rohsenow, and P. Grifth, On bubble growth rates, Int. J. Heat Mass Transfer 13 (1970) 657-666.
    [40] V.K. Dhir, Nucleate and transition boiling heat transfer under pool and external flow conditions, Int. J. Heat and fluid flow 12 (1991) 290-314.
    [41] J.F. Klausner, R. Mei, D.M. Bernhard, and L.Z. Zeng, Vapor bubble departure in forcedconvection boiling, Int. J. Heat Mass Transfer 36 (1993) 651–662.
    [42] S.G. Kandlikar, B.J. Stumm, A control volume approach for investigating forces on a departing bubble under subcooled flow boiling, J. Heat Transfer 117 (1995) 990-997.
    [43] G. Fournelle, S.H. Bhavnani, and R.C. Jaeger, Optical study of enhanced heat transfer from a heat sink for microelectronics applications, in Proc. Pacific Rim/ASME Int. Intersoc. Electron. Packag. Conf., Lahaina, HI, 1999.
    [44] G.R. Warrier, V.K. Dhir and L.A. Momoda, Heat transfer and pressure drop in narrow rectangular channels, Experimental Thermal and Fluid Science 26 (2002) 53-64.
    [45] R. Situ, T. Hibiki, M. Ishii, and M. Mori, Bubble lift-off size in forced convective subcooled boiling flow, Int. J. Heat Mass Transfer 48 (2005) 5536-5548.
    [46] C.A. Damianides, J.W. Westwater, Two-phase flow patterns in a compact heat exchanger and in small tubes, In: Proc. Second UK National Conf. On Heat Transfer, vol. 2, Glasgow, Scotland, 1988, 1257-1268.
    [47] A.M. Barajas, R.L. Panton, The effect of contact angle on two-phase flow in capillary tubes, Int. J. Multiphase Flow 19 (1993) 337-346.
    [48] J.W. Coleman, S. Garimella, Characteristics of two-phase patterns in small diameter round and rectangular tubes, Int. J. Heat Mass Transfer 42 (1999) 2869-2881.
    [49] K. Mishima, T. Hibiki, H. Nishihara, In Some characteristics of air–water two-phase flow in small diameter tubes, Proc 2nd Int. Conf. Multiphase Flow, Tokyo, Japan, 1995; pp 39-46.
    [50] K.A. Triplett, S.M. Ghiaasiaan, S.I. Abdel-Khalik, et al., Gas–liquid two-phase flow in microchannels, Part I: Two-phase flow patterns, Int. J. Multiphase Flow 25 (1999) 377-394.
    [51] C.Y. Yang, C.C. Shieh, Flow pattern of air-water and two-phase R-134a in small circular tubes, International Journal of Multiphase Flow 27 (7) (2001) 1163-1177.
    [52] T.S. Zhao, Q.C. Bi, Co-current air–water two-phase flow patterns in vertical triangular microchannels, Int. J. Multiphase Flow 27 (2001) 765-782.
    [53] M.K. Akbar, D.A. Plummer, S.M. Ghiaasiaan, On gas-liquid two-phase flow regimes in microchannels, International Journal of Multiphase Flow 29 (5) (2003) 855-865.
    [54] L. Chen, Y.S. Tian, T.G. Karayiannis, The effect of tube diameter on vertical two-phase flow regimes in small tubes, International Journal of Heat and Mass Transfer 49 (21-22) (2006) 4220-4230.
    [55] A. Serizawa, Z.P. Feng, Two-phase Flow in Microchannels, International Conference of Multiphase Flows, Keynote Lecture, New Orleans, Louisiana, 2001.
    [56] T. Cubaud, C.M. Ho, Transport of bubbles in square microchannels, Physics of Fluids 16 (2004) 4575-4585.
    [57] T. Fukano, A. Kariyasaki, Characteristics of gas-liquid two-phase flow in a capillary tube, Nucl. Eng. Des. 141(1993) 59-68.
    [58] J. Pettersen, Two-phase flow patterns in microchannel vaporization of CO2 at near-critical pressure, Heat Transfer Engineering 25 (3) (2004) 52-60.
    [59] L. Zhao, K.S. Rezkallah, Gas-liquid flow patterns at microgravity conditions, Int. J. Multiphase Flow 19 (1993) 751-763.
    [60] D.C. Lowe, K.S. Rezkallah, Flow regime identification in microgravity two-phase flow using void fraction signals, Int. J. Multiphase Flow 25 (1999) 433-457.
    [61] K.S. Rezkallah, Weber number based flow-pattern maps for liquid-gas flows at microgravity, Int. J. Multiphase Flow 22 (1996) 1265-1270.
    [62] H. Ide, A. Kariyasaki, T. Fukano, Fundamental data on the gas-liquid two-phase flow in minichannels, International Journal of Thermal Sciences 46 (6) (2007) 519-530.
    [63] R. Revellin, J.R. Thome, Experimental investigation of R-134a and R-245fa two-phase flow in microchannels for different flow conditions, International Journal of Heat and Fluid Flow 28 (1) (2007) 63-71.
    [64] J.M. Kim, K.H. Bang, Evaporation heat transfer of refrigerant R-22 in small diameter tubes, Proceedings of the Fourth International Conference on Multiphase Flow, ASME, New Orleans, , 2001.
    [65] V.V. Kuznetsov, A.S. Shamirzaev, Two-phase flow pattern and flow boiling heat transfer in noncircular channel with a small gap, Two-Phase Flow Modeling and Experimentation (1999) 249-253.
    [66] A.M. Barajas, R.L. Panton, The effects of contact angle on two-phase flow in capillary tubes, International Journal of Multiphase Flow 19 (2) (1993) 337-346.
    [67] W. Qu, I. Mudawar, Transport phenomena in two-phase micro-channel heat sinks, Journal of Electronic Packaging, Transaction of the ASME 126 (2004) 213-224.
    [68] G. Hetsroni, A. Mosyak, Z. Segal, and E. Pogrebnyak, Two-phase flow patterns in parallel micro-channels, Int. J. Multiphase flow 29 (2003) 341-360.
    [69] J. Xu, S. Shen, Y. Gan, et al. Transient flow pattern based microscale boiling heat transfer mechanisms, J. Micromech. Microeng. 15 (2005) 1344-1361.
    [70] L. Jiang, M. Wong, Y. Zohar, Forced convection boiling in a microchannel heat sink, Journal of Microeletromechanical Systems 10 (2001) 80-87.
    [71] W. Owhaib, C.M. Callizo, B. Palm, Evaporative heat transfer in vertical circular microchannels, Appl. Therm. Eng. 24 (2004) 1241-1253.
    [72] S.G. Kandlikar, Heat transfer mechanisms during flow boiling in microchannels, J. Heat Transfer 126 (2004) 8-16.
    [73] R. Revellin, B. Agostini, T. Ursenbacher, J.R. Thome, Experimental investigation of velocity and length of elongated bubbles for flow of R-134a in a 0.5 mm microchannel, Experimental Thermal and Fluid science 32 (2008) 870-881.
    [74] W. Owhaib, B. Palm, and C.M. Callizo, A visualization study of bubble behavior in saturated flow boiling through a vertical mini-tube, Heat Transfer Eng. 28 (2007) 852-860.
    [75] G.P. Celata, M. Cumo, D. Gallo, et al., A Photographic study of subcooled flow boiling burnout at high heat flux and velocity, Int. J. Heat Mass Transfer 50 (2007) 283-291.
    [76] P.C. Lee, F.G. Tseng, C. Pan, Bubble dynamics in mcirochannels. PartⅠ: single microchannel, Int. J. Heat and Mass Transfer 47 (2004) 5575-5589.
    [77] M. Lee, Y.Y. Wong, M. Wong and Y. Zohar, Size and shape effects on two-phase flow patterns in microchannel forced convection boiling, J. Micromech. Microeng. 13 (2003) 155-164
    [78] C.J. Kuo, A. Kosar, Y. Peles, et al., Bubble dynamics during boiling in enhanced surface microchannels, Journal of Microelectromechanical Systems 15 (2006) 1514-1527.
    [79] N. Reinecke, G. Petritsch, D. Schmitz and D. Mewes, Tomographic measurement techniques -visualization of multiphase flows, Chem. Eng. Technol. 21(1998) 7-18
    [80] E. Schleicher, M. J. da Silva, S.L.A Thiele, E. Wollrab and U. Hampel, Design of an optical tomograph for the investigation of single and two-phase pipe flows, Meas. Sci. Technol. 19 (2008) 094006
    [81] T. Okawa, T. Ishida, I. Kataoka, M. Mori, Bubble rise characteristics after the departure from a nucleation site in vertical upflow boiling of subcooled water, Nuclear Engineering and Design 235 (2005) 1149-61.
    [82] T. Takamasa, K. Kondo, M. Kawase, K.S. Rezkallah, N.K. Clarke, Measurement of interfacial configuration of bubbly flow under normal and microgravity conditions using stereo image-processing method, Transactions of the Japan Society of Mechanical Engineers, Part B 63 (1997) 396-403.
    [83] T. Takamasa, A. Tomiyama, Three-dimensional gas-liquid two-phase flow in a C-shaped tube Ninth Inernatinal Topical Meeting on Nuclear Reactor thermal Hydraulics, San Francisco, California, October 1999: 3-8
    [84] G.P. Celata, M. D’Annibale F. Cumo, P.D. Marco, A. Tomiyama, C. Zovini, Effect of gas injection mode and purity of liquid on bubble rising in two-component systems, Experimental Thermal and Fluid Science 31 (2006 ) 37-53.
    [85] D. Liu, P.S. Lee, S.V. Garimella, Prediction of the onset of nucleate boiling in microchannel flow, Int.J. Heat Mass Transfer 448 (2005) 5134-5149.
    [86] C.W. Hirt, B. Nichols, Volume of fluid (VOF) method for dynamics of free boundaries, J. Comput. Phys. 39 (1981) 201-225.
    [87] S. Osher, J.A. Sethian, Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations, J. Comput. Phys. 79 (1988) 12-49.
    [88] A. Mukherjee, S.G. Kandlikar, Numerical simulation of growth of a vapor bubble during flow boiling of water in a microchannel, Microfluid Nanofluid 1 (2005) 137-145.
    [89] W. Lee, G. Son, Bubble dynamics and heat transfer during nucleate boiling in a microchannel, Numer. heat transfer, Part A 53 (2008) 1074-1090.
    [90] D. Li, V.K. Dhir, Numerical study of single bubble dynamics during flow boiling, J. Heat Transfer 129 (2007) 864-876.
    [91] J. Wu, V.K. Dhir, J. Qian, Numerical simulation of subcooled nucleate boiling by coupling level set method with moving-mesh method, Numer. Heat Transfer, Part B 51 (2007) 535-563.
    [92] M. sussman, P. Smereka, et al., A level set approach for computing solutions to incompressible two-phase flow, J. Comput. Phys. 114 (1994) 146-159.
    [93] M. Sussman, E.G. Puckett, A coupled Level set and Volum-of-Fluid method for computing 3D and Axisymmetric in compressible two-phase flows, J. Comput. Phys. 162 (2000) 301-337.
    [94] R. Gupta, D.F. Fletcher and B.S. Haynes, CFD modeling of flow and heat transfer in the Taylor flow regime, Chem. Eng. Sci. 65 (2010) 2094-2107.
    [95] Y.Q. Zu, Y.Y. Yan, S. Gedupudi, et al., Confined bubble growth during flow boiling in a mini-/micro-channel of rectangular cross-section partⅡ: Approximate 3-D numerical simulation, Int. J. thermal Science, 2010, doi:10.1016/j.ijthermalsci.2010.09.004
    [96] R. Singh, A. Akbarzadeh, M. Mochizuki, et al., Thermal characterization of a copper microchannel heat sink of power electronics cooling, Journal of Thermophysics and Heat Transfer 23 ( 2009) 371-380.
    [97] T. Wen, J. Tian, T.J. Lua, D.T. Queheillaltc and H.N.G. Wadleyc, Forced convection in metallic honeycomb structures, Int. J. Heat Mass Transfer 49 (2006) 3313-3324.
    [98] H. Chengalvala, A.S. Fleischer, G.F. Jones, Experimental characterization of a unique carbon fiber brush heat sink in two-phase heat transfer, American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, Volume 376 HTD, Issue 1, 2005, Pages 627-632.
    [99] R. Span, E.W. Lemmon, R.T. Jacobsen, et al., A reference equation of state for the thermodynamic properties of nitrogen for temperatures from 63.151 to 1000 K and pressures to 2200 Mpa, Journal of Physical and Chemical Reference Data 29 (6) (2000) 1361-1433.
    [100] E.W. Lemmon, R.T. Jacobsen, Viscosity and thermal conductivity equations for nitrogen, oxygen, argon, and air, Int. J. Thermophysics 25 (1) (2004) 21-69.
    [101] V.A. Grigorev, Y.M. Pavlov, E.V. Ametistov, Correlation of experimental data on heat transfer with pool boiling of several cryogenics liquids, Therm. Eng. 20 (1973) 81-89.
    [102] W. Bald, Cryogenics heat transfer research at Oxford, part 1- nucleate pool boiling, Cryogenics 13 (1973) 457-469.
    [103] K. Stephan, M. Abdelsalam, Heat-Transfer correlations for natural convection boiling, Int. J. Heat Mass Transfer 23 (1) (1980) 73-87.
    [104] P. Brennan, E. Skrabek, Design and development of prototype static cryogenics heat transfer, 1971, NASA CR-121939.
    [105] D. Steiner, E.U. Schlunder, Heat transfer and pressure drop for boiling nitrogen flowing in a horizontal tube 1. Saturated flow boiling, Cryogenics 16 (3) (1976) 387-399.
    [106] D. Steiner, E.U. Schlunder, Heat transfer and pressure drop for boiling nitrogen flowing in a horizontal tube 2. Pressure drop, Cryogenics 16 (3) (1976) 457-764.
    [107] M.M. Shah, Prediction of heat transfer during boiling of cryogenics fluids flowing in tubes, Cryogenics 24(3) (1984) 231-236.
    [108] P.J. Marto, J.A. Moulson, M.D. Maynard, Nucleate pool boiling of nitrogen with different surface conditions, ASME J. Heat Transfer 90 (4) (1968) 437-444.
    [109] H. Ackermann, L. Bewilogua, H. Vinzelberg, Bubble boiling from heated surface of different material in liquid nitrogen, Cryogenics 15 (1975) 677-678.
    [110] Y. Asao, M. Ozawa, Boiling heat transfer and flow pattern of liquid nitrogen,日本机械学会论文集(B) 57 (1991) 1813-1818.
    [111] R. Das, S. Pattanayaka, Flow regime identification in cryogenic gas-liquid flow through vertical tubes, Cryogenics 35 (6) (1995) 393-398.
    [112] J.M. Robertson, Boiling heat transfer with liquid nitrogen in brazed-aluminum plate-fin heat exchangers, National Heat Transfer Conference, San Diego, AIChE Sympo. 1979, Ser. 189 (75): 151-164.
    [113] J.M. Robertson, The boiling characteristics of perforated plat-fin channels with liquid nitrogen in upflow, Heat Exchangers for Two-Phase Applications, Processing of the ASME Heat Transfer Division 10 (1983) 35-40.
    [114]任欣,张鹏,王如竹,大空间和毛细管内液氮池沸腾传热的实验研究,低温与超导33 (3) (2005) 21-24.
    [115] J. M. Pfotenhauer, M.R. Lee, Corradini M L, Visualization at cryogenic temperature using a glass fiber bundle, Cryogenics 41 (2001) 437-441.
    [116] B. Rousset, D. Chatain, L. Puech, et al., Visualzation in cryogenic environment: Application to two-phase studies, Cryogenics 49 (2009) 554-564.
    [117]张鹏,伍宇烨,许煜雄,王如竹,低温热电偶的标定及标定过程中的非线性现象的研究,低温物理学报25(1) (2003) 51-56.
    [118] S.G. Kandlikar, M.E. Steinke, M.E. Tian, L.A. Campbell, High-speed photographic observation of flow boiling of water in parallel mini-channels. In: Proc. 2001, National Heat Transfer Conference, Anaheim, CA, 10-112 June.
    [119] R. Revellin, V. Dupont, T. Ursenbacher, et al., Characterization of diabatic two-phase flows in microchannels: Flow parameter results for R-134a in a 0.5 mm channel, International Journal of Multiphase Flow 32 (7) (2006) 755-774.
    [120] S.G. Kandlikar and P. Balasubramanian, Effect of gravitational orientation on flow boiling of water in 1054×197 micron parallel minichannels, in Proceedings of the Second International Conference on Microchannels and Minichannels, ASME Paper No. ICMM 2004-2379, June 17-19, 2004, Rochester, NY, USA, pp. 539-550, 2005.
    [121] L.Z. Zeng and J.F. Klausner, Nucleation site density in forced convection boiling, J. Heat Transfer 115 (1993) 215-221.
    [122] M. Lee, L.S.L. Cheung, Y.K. Lee, Y. Zohar, Height effect on nucleation-site activity and size-dependent bubble dynamics in microchannel convective boiling, J. Micromech. Microeng. 15 (2005) 2121-2129.
    [123] A.M. Jacobi, J.R. Thome, Heat transfer model for evaporation of elongated bubble flows in microchannels, J. Heat Transfer 124 (2002) 1131-1136.
    [124] S.G. Kandlikar, Effect of liquid-vapor phase distribution on the heat transfer mechanisms during flow boiling in minichannels and microchannels, Heat Transfer Eng. 27 (2006) 4-13.
    [125] S.G. Kandlikar, Nucleation characteristics and stability considerations during flow boiling in microchannels, Experimental Thermal and Fluid Science 30 (2006) 441-447.
    [126] Y. Suh, W. Lee, G. Son, Bubble dynamics, flow, and heat transfer during flow boiling in parallel microchannels, numerical heat transfer, Part A 54 (2008) 390-405.
    [127] Y. Katto, A generalized correlation of critical heat flux for the forced convection boiling in vertical uniformly heated round tubes, Int. J. Heat Mass Transfer 21 (1978) 1527-1542.
    [128] M.B. Bowers and I. Mudawar, High flux boiling in low flow rate, low pressure drop mini-channel and micro-channel heat sinks, Int. J. Heat Mass Transfer 37 (1994) 321-334.
    [129] M. Piasecka and M.E. Poniewski, Hysteresis phenomena at the onset of subcooled nucleate flow boiling in microchannels, Heat Transfer Eng. 25 (2004) 44-51.
    [130] R.L. Judd, A. Chopra, Interaction of the nucleation processes occurring at adjacent nucleation sites, J. Heat Transfer 115 (1993) 955–962.
    [131] T. Sato, Y. Koizumi, H. Ohtake, Experimental study on fundamental phenomena of boiling using heat transfer surfaces with well-defined cavities created by MEMS, Journal of Heat transfer 130 (2008) pp. 084501-1-084501-4,.
    [132] W.G. Laverty, W.M. Rohsenow, Film boiling of saturated liquid nitrogen flowing in a vertical tube, J. Heat Transfer 89 (1967) 90-98.
    [133] G. De Jarlais, M. Ishii, , and J. Linehan, Hydrodynamic stability of inverted annular flow in an adiabatic simulation, Journal of Heat Transfer 108 (1986) 85-92.
    [134] P.Y. Chung, M. Kawaji, A. Kawahara, et al., Two-phase flow through square and circular microchannels- effects of channels geometry, J. Fluids Engineering, 126 (2004) 546-552.
    [135] Ishii, M., Study on flow instabilities in two-phase mixture, Argonne National Laboratory Report ANL-76-23 (1976).
    [136] F.A. Jeglic and T.M. Grace, Onset of flow oscillations in forced flow subcooled boiling, NASA-TN-2821 (1964).
    [137] A. Kawahara, P.M.Y. Chung, M. Kawaji, Investigation of two-phase flow pattern, void fraction and pressure drop in a microchannel, Int. J. Heat Mass Transfer 28 (2002) 1411-35.
    [138] J.U. Brackbill, D.B. Kothe, C. Zemach, A continuum method for modeling surface tension, J. Comput. Phys. 100 (1992) 335-354.
    [139] R.W. Schrage, A theoretical study of interface mass transfer, Columbia University Press, New York, 1953.
    [140] R. Marek, J. Straub, Analysis of the evaporation coefficient and the condensation coefficient of water, Int. J. Heat Mass Transfer 44 (2001) 39-53.
    [141] R. Marek, J. Straub, The origin of thermocapillary convection in subcooled nucleate pool boiling, Int. J. Heat Mass Transfer 44 (2001) 619-632.
    [142] B. Paul, Complication of evaporation coefficients, Am. Rocket Soc. J. 32 (1962) 1321-1328.
    [143] M.G. Cooper, A.J.P. Lloyd, The microlayer in nucleate pool boiling, Int. J. Heat Mass Transfer 12 (1969) 895-913.
    [144] J.H. Lay and V.K. Dhir, Shape of a vapor stem during nucleate boiling of saturated liquids, J. Heat Transfer 117 (1995) 394-401.
    [145] D. Khrustalev and A. Faghri, Heat transfer during evaporation on capillary-grooved structures of heat pipes, J. Heat Transfer 117 (1995) 740-747.
    [146] J. Schlottke, B. Weigand, Direct numerical simulation of evaporating droplets, J. Comput. Phys. 227 (2008) 5215-5237.
    [147] H. Wang, Garimella SV, Murthy JY, Characteristics of an evaporating thin film in a microchannel, Int. J. Heat Mass Transfer 50 (2007) 3933-3942.
    [148] G. Son, V.K. Dhir, N. Ramanujapu, Dynamics and heat transfer associated with a single bubble during nucleate boiling on a horizontal surface, J. Heat Transfer 121 (1999) 623-631.
    [149] C. Choi, J.S. Shin, D.Y. Kim, M.H. Kim, flow boiling behaviors in hydrophilic and hydrophobic microchannels, Experimental thermal and fluid science, (2010), doi:10.1016/j.expthermflusci.2010.07.003
    [150] H.S. Abarajith, V.K. Dhir, Effect of contact angle on the dynamics of a single bubble during pool boiling using numerical simulations. 2002, Proceedings of IMECE, New Orleans, ASME, New York, Paper no. IMECE 2002-33876.
    [151] D. Goel and V.V. Buwa, Numerical simulation of bubble formation and rise in microchannels, Ind. Eng. Chm. Res. 48 (2009) 8109-8120
    [152] W. Salman, A. Gavriilidis, P. Angeli, On the formation of Taylor bubbles in small tubes, Chem. Eng. Sci. 61(2006) 6653-6666.
    [153] T. Chen, S.V. Garimella, Measurements and high-speed visualizations of flow boiling of a dielectric fluid in a silicon microchannel heat sink, Int. J. Multiphase Flow 32 (2006) 957-971.
    [154] X.F. Peng, H.Y. Hu, B.X. Wang, Boiling Nucleation during Liquid Flow in Microchannels,Int. J. Heat Mass Transfer 41 (1998) 101-106.
    [155] G. Hetsroni, A. Mosyak, Z. Segal, G. Ziskind, A uniform temperature heat sink for cooling of electronic devices, Int. J. Heat Mass Transfer 45 (2002) 3275-3286.
    [156] D. Lelea, The conjugate heat transfer of the partially heated microchannels, Heat Mass Transfer 44 (2007) 33-41.
    [157] A. Kosar, Effect of substrate thickness and material on heat transfer in microchannel heat sink, Int. J. Therm. Sci. 49 (2010) 635-642.
    [158] C.W. Bullard, Design tradeoffs in microchannel heat exchangers, ACRC Report #124 (2002).
    [159] R. Chein, J. Chen, Numerical study of the inlet/outlet arrangement effect on microchannel heat sink performance, Int. J. Therm. Sci. 48 (2009) 1627-1638.
    [160] S. Vist, J. Petterson, Two-Phase flow distribution in compact heat exchanger manifolds, Exp.Thermal Fluid Sci. 28 (2004) 209-215.
    [161] J.K. Lee, S.Y. Lee, Distribution of two-phase annular flow at header-channel junctions. Exp.Thermal Fluid Sci. 28 (2004) 217-222
    [162] W. Qu, I. Mudawar, Measurement and predication of pressure drop in two-phase micro-channels heat sinks, Int. J. Heat Mass Transfer 46 (2003) 2723-2753.
    [163] S. Edelstein, A. J. Perez, J. C. Chen, Analytic representation of convective boiling functions. AIChE J. 30 (1984) 840-841.
    [164] S.G. Kandlikar, A General Correlation for Saturated Two-phase Flow Boiling Heat Transfer inside Horizontal and Vertical Tubes, J. Heat Tran. 112 (1990) 219-228.
    [165] Z. Liu, R.H.S. Winterton, A general correlation for satureated and subcooled flow boiling in tubes and annuli, based on a nucleate boiling equation, Int. J. Heat Mass Tran. 34 (1991) 2759-2766.
    [166] T.N. Tran, M.W. Wambsganss, D.M. France, Small circular and rectangular-channel boiling with two refrigerants, Int. J. Multiphas. Flow 22 (1996) 485-498.
    [167] G.R. Warrier, V.K. Dhir, L.A. Momoda, Heat transfer and pressure drop in narrow rectangular channels, Exp. Therm. Fluid Sci. 26 (2002) 53-64.
    [168] H.H. Bau, Optimization of conduits’shape in micro-heat exchanger, Int. J. Heat Mass transfer 41 (1998) 2717-2723.
    [169] K.H. Chang, C. Pan, Two-phase flow instability for boiling in a microchannel heat sink, Int. J. Heat Mass Transfer 50 (2007) 2078-2088.
    [170] G. Hetsroni, A. Mosyak, E. Pogrebnyak, et al., Explosive boiling of water in parallel micro-channels, Int. J. Multiphase Flow 31(4) (2005) 371-392.
    [171] L. Tadrist, Review on two-phase flow instabilities in narrow spaces, Int. J. Heat Fluid Flow 28 (2007) 54-62.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700