壁面性质对蛇形微通道弹状流传热特性的影响
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摘要
采用CLSVOF (coupled level set and volume of fluid)方法,以空气和水为介质对矩形截面蛇形微通道内弹状流流动传热进行模拟研究。改变气液相流速,探讨了沿程局部Nu数的变化情况;改变接触角及相对粗糙度,分析其对微通道传热的影响;比较不同形貌粗糙元对微通道传热特性的影响;最后,基于Design-Expert平台,对蛇形微通道进行了优化设计。计算结果表明,与单相流动相比,弹状流可以强化传热,且局部Nu数随气弹的出现呈周期性变化;无滑移壁面条件下,疏水壁面一定程度上阻碍传热;粗糙壁面微通道可强化换热,且合理布置的随机粗糙元传热效果最好。
Gas-liquid two-phase flow and heat transfer characteristics in serpentine microchannel was studied using a CLSVOF(coupled level set and volume of fluid) method with air and water as the media. Variation of local Nu number along distance was discussed by changing velocity of gas and liquid. Effects of contact angle and relative roughness on heat transfer characteristics were analyzed, and effects of roughness factors of different shapes on heat transfer were compared. Moreover, serpentine microchannels were optimized based on Design-Expert platform. The results show that slug flow can enhance heat transfer characteristics compared with single phase flowing in microchannels, and local Nu number shows periodic variation with the emergence of slug. Heat transfer is hindered when liquids flow in microchannel with hydrophobic surface with no-slip wall. Microchannels with rough wall have better heat transfer and reasonable arrangement of random roughness elements has the best heat transfer effect.
Gas-liquid two-phase flow and heat transfer characteristics in serpentine microchannel was studied using a CLSVOF(coupled level set and volume of fluid) method with air and water as the media. Variation of local Nu number along distance was discussed by changing velocity of gas and liquid. Effects of contact angle and relative roughness on heat transfer characteristics were analyzed, and effects of roughness factors of different shapes on heat transfer were compared. Moreover, serpentine microchannels were optimized based on Design-Expert platform. The results show that slug flow can enhance heat transfer characteristics compared with single phase flowing in microchannels, and local Nu number shows periodic variation with the emergence of slug. Heat transfer is hindered when liquids flow in microchannel with hydrophobic surface with no-slip wall. Microchannels with rough wall have better heat transfer and reasonable arrangement of random roughness elements has the best heat transfer effect.
引文
[1]ZHOU Yun-long(周云龙),CHANG He(常赫).Numerical simulation on flow pattern of gas-liquid two-phase flow in serpentine micro-channel(蛇形微通道气液两相流型的数值研究)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2016,30(5):1067-1073.
[2]Dang D J,Yue J,Chen G W.Numerical simulation of Taylor bubble information in a microchannel contactors[J].Chemical Engineering Science,2015,262(1):616-627.
[3]Soheil S,Esmaiil G,Chen X L.Numerical study of heat transfer enhancement using transverse microchannels in a heat sink[J].International Journal of Thermal Sciences,2018,125:89-100.
[4]Balaras C A.A review of augmentation techniques for heat transfer surfaces in single-phase heat exchangers[J].Energy,1990,15(10):899-906.
[5]Tuckerman D B,Pwase R F W.High-performance heat sinking for VLSI[J].IEEE Electron Device Letter,1981,2(5):126-129.
[6]Vasudevaiah M,Balamurugan K.Heat transfer of rarefied gases in a corrugated microchannel[J].International Journal of Thermal Sciences,2001,40(5):454-468.
[7]ZHOU Ji-jun(周继军),SHEN Sheng(申盛),XU Jin-liang(徐进良).Single-phase flow and heat transfer in micro-channels(微槽道内单相流动阻力与传热特性)[J].Journal of Chemical Industry and Engineering(China)(化工学报),2005,56(10):1849-1855.
[8]Chen Y,Akria N.Heat transfer performance assessment for forced convection in a tube partially filled with a porous medium[J].International Journal of Thermal Sciences,2012,54(1):98-128.
[9]Lim Y S,Yu S C M.Numerical simulation of heat transfer characteristics of gas-liquid two phase flow in microtubes[J].International Journal of Thermal Sciences,2014,86:115-124.
[10]Moody L F.Friction factors for pipe flow[J].Trans of the ASME,1944,111(442):488-491.
[11]Mala G M,Li D.Flow characteristics of water in microtubes[J].Heat Mass Transfer,1999,20(2):142-148.
[12]ZOU Jiang(邹江),PENG Xiao-feng(彭晓峰),YAN Wei-mou(颜维谋).Effects of roughness on fluid flow behavior in ducts(壁面粗糙度对通道流动特性的影响)[J].Journal of Chemical Industry and Engineering(China)(化工学报),2008,59(1):25-31.
[13]ZHOU Yun-long(周云龙),CHANG He(常赫).Numerical simulation on flow pattern of gas-liquid two-phase flow in serpentine micro-channel(壁面性质对蛇形微通道流动特性的影响)[J].Atomic Energy Science and Technology(原子能科学技术),2017,51(1):27-32.
[14]Hsieh S S,Lin C Y.Convective heat transfer in liquid microchannels with hydrophobic and hydrophilic surfaces[J].International Journal of Heat and Mass Transfer,2009,52(1-2):260-270.
[15]ZHOU Yun-long(周云龙),CHANG He(常赫).Lattice Boltzmann simulation of gas-liquid flow in serpentine microchannel with different inlet angles and wall properties(入口角度及壁面性质对蛇形微通道内弹状流流动特性影响的格子Boltzmann模拟)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2017,31(2):323-328.
[16]Talimi V,Muzychka Y S,Kocabiyik S.Numerical simulation of the pressure drop and heat transfer of two phase slug flows in microtubes using moving frame of reference technique[J].International Journal of Heat Mass Transfer,2012,55(23-24):6463-6472.
[17]Lim Y S,Yu S C M,Nguyen N T.Flow visualization and heat transfer characteristics of gas-liquid two-phase flow in microtube under constant heat flux at wall[J].International Journal of Heat Mass Transfer,2013,56(12):350-359.
[18]DAI Jian-feng(戴剑峰),FAN Xue-ping(樊雪萍),MENG Bo(蒙波).A coupled level-set and volume-of-fluid simulation for splashing of single droplet impact on an inclined liquid film(单液滴撞击倾斜液膜飞溅过程的耦合Level-set-VOF模拟)[J].Acta Physica Sinica(物理学报),2015,64(9):094704.
[19]ZHOU Yun-long(周云龙),SUN Zhen-guo(孙振国).Gas-liquid two-phase flow in serpentine microchannels with small curvature and 90°Y-shape mixing junction(90°Y型汇流下小曲率矩形截面蛇形微通道气液两相流动特性)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2017,31(1):38-42.
[20]ZHOU Yun-long(周云龙),CHANG He(常赫).Numerical simulation of gas-liquid flow and mass transfer in curve part of serpentine microchannel with small curvature(小曲率蛇形微通道弯头处弹状流流动及传质特性的数值研究)[J].CIESC Journal(化工学报),2017,68(1):97-103.
[21]CHANG He(常赫).Numerical simulation on gas-liquid two-phase flow and characteristics in serpentine micro channel(蛇形微通道气液两相流型数值模拟与层动特性分析)[D].Jilin(吉林):Northeast Electric Power University(东北电力大学),2017.
[22]Byun D,Kim J,Ko H S.Direct measurement of slip flows in superhydrophobic microchannels with transvers grooves[J].Physics Fluids,2003,15(10):2897-2902.
[23]Madhwa H D,Mihajlo G.Three-dimensional laminar slip-flow and heat transfer in a rectangular microchannel with constant wall temperature[J].International Journal of Heat Mass Transfer,2008,51(21-22):5088-5096.
[24]QI Bao-jin(齐宝金),ZHANG Li(张莉),XU Hong(徐宏).Contact angle affected fractal model of dropwise condensation heat transfer(引入接触角的滴状冷凝分形传热功当量模型)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2011,25(5):751-758.
[25]HUANG Dao-jun(黄道君),YOU Xue-yi(尤学一).AFM and XPS study of surface properties of PDMS plate(聚合物PDMS片表面特性的AFM和XPS初步研究)[J].Mordern Instruments(现代仪器),2007,13(1):1-5.
[26]CHEN Jian-hua(陈建华),ZHANG Hui-qiang(张会强),ZHANG Gui-tian(张贵田).Flow and heat transfer in a mini cooling channel with artificial roughness(含人为粗糙元微小冷却通道内的流动与换热)[J].Journal of Tsinghua University(清华大学学报),2008,48(5):900-903.
[2]Dang D J,Yue J,Chen G W.Numerical simulation of Taylor bubble information in a microchannel contactors[J].Chemical Engineering Science,2015,262(1):616-627.
[3]Soheil S,Esmaiil G,Chen X L.Numerical study of heat transfer enhancement using transverse microchannels in a heat sink[J].International Journal of Thermal Sciences,2018,125:89-100.
[4]Balaras C A.A review of augmentation techniques for heat transfer surfaces in single-phase heat exchangers[J].Energy,1990,15(10):899-906.
[5]Tuckerman D B,Pwase R F W.High-performance heat sinking for VLSI[J].IEEE Electron Device Letter,1981,2(5):126-129.
[6]Vasudevaiah M,Balamurugan K.Heat transfer of rarefied gases in a corrugated microchannel[J].International Journal of Thermal Sciences,2001,40(5):454-468.
[7]ZHOU Ji-jun(周继军),SHEN Sheng(申盛),XU Jin-liang(徐进良).Single-phase flow and heat transfer in micro-channels(微槽道内单相流动阻力与传热特性)[J].Journal of Chemical Industry and Engineering(China)(化工学报),2005,56(10):1849-1855.
[8]Chen Y,Akria N.Heat transfer performance assessment for forced convection in a tube partially filled with a porous medium[J].International Journal of Thermal Sciences,2012,54(1):98-128.
[9]Lim Y S,Yu S C M.Numerical simulation of heat transfer characteristics of gas-liquid two phase flow in microtubes[J].International Journal of Thermal Sciences,2014,86:115-124.
[10]Moody L F.Friction factors for pipe flow[J].Trans of the ASME,1944,111(442):488-491.
[11]Mala G M,Li D.Flow characteristics of water in microtubes[J].Heat Mass Transfer,1999,20(2):142-148.
[12]ZOU Jiang(邹江),PENG Xiao-feng(彭晓峰),YAN Wei-mou(颜维谋).Effects of roughness on fluid flow behavior in ducts(壁面粗糙度对通道流动特性的影响)[J].Journal of Chemical Industry and Engineering(China)(化工学报),2008,59(1):25-31.
[13]ZHOU Yun-long(周云龙),CHANG He(常赫).Numerical simulation on flow pattern of gas-liquid two-phase flow in serpentine micro-channel(壁面性质对蛇形微通道流动特性的影响)[J].Atomic Energy Science and Technology(原子能科学技术),2017,51(1):27-32.
[14]Hsieh S S,Lin C Y.Convective heat transfer in liquid microchannels with hydrophobic and hydrophilic surfaces[J].International Journal of Heat and Mass Transfer,2009,52(1-2):260-270.
[15]ZHOU Yun-long(周云龙),CHANG He(常赫).Lattice Boltzmann simulation of gas-liquid flow in serpentine microchannel with different inlet angles and wall properties(入口角度及壁面性质对蛇形微通道内弹状流流动特性影响的格子Boltzmann模拟)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2017,31(2):323-328.
[16]Talimi V,Muzychka Y S,Kocabiyik S.Numerical simulation of the pressure drop and heat transfer of two phase slug flows in microtubes using moving frame of reference technique[J].International Journal of Heat Mass Transfer,2012,55(23-24):6463-6472.
[17]Lim Y S,Yu S C M,Nguyen N T.Flow visualization and heat transfer characteristics of gas-liquid two-phase flow in microtube under constant heat flux at wall[J].International Journal of Heat Mass Transfer,2013,56(12):350-359.
[18]DAI Jian-feng(戴剑峰),FAN Xue-ping(樊雪萍),MENG Bo(蒙波).A coupled level-set and volume-of-fluid simulation for splashing of single droplet impact on an inclined liquid film(单液滴撞击倾斜液膜飞溅过程的耦合Level-set-VOF模拟)[J].Acta Physica Sinica(物理学报),2015,64(9):094704.
[19]ZHOU Yun-long(周云龙),SUN Zhen-guo(孙振国).Gas-liquid two-phase flow in serpentine microchannels with small curvature and 90°Y-shape mixing junction(90°Y型汇流下小曲率矩形截面蛇形微通道气液两相流动特性)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2017,31(1):38-42.
[20]ZHOU Yun-long(周云龙),CHANG He(常赫).Numerical simulation of gas-liquid flow and mass transfer in curve part of serpentine microchannel with small curvature(小曲率蛇形微通道弯头处弹状流流动及传质特性的数值研究)[J].CIESC Journal(化工学报),2017,68(1):97-103.
[21]CHANG He(常赫).Numerical simulation on gas-liquid two-phase flow and characteristics in serpentine micro channel(蛇形微通道气液两相流型数值模拟与层动特性分析)[D].Jilin(吉林):Northeast Electric Power University(东北电力大学),2017.
[22]Byun D,Kim J,Ko H S.Direct measurement of slip flows in superhydrophobic microchannels with transvers grooves[J].Physics Fluids,2003,15(10):2897-2902.
[23]Madhwa H D,Mihajlo G.Three-dimensional laminar slip-flow and heat transfer in a rectangular microchannel with constant wall temperature[J].International Journal of Heat Mass Transfer,2008,51(21-22):5088-5096.
[24]QI Bao-jin(齐宝金),ZHANG Li(张莉),XU Hong(徐宏).Contact angle affected fractal model of dropwise condensation heat transfer(引入接触角的滴状冷凝分形传热功当量模型)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2011,25(5):751-758.
[25]HUANG Dao-jun(黄道君),YOU Xue-yi(尤学一).AFM and XPS study of surface properties of PDMS plate(聚合物PDMS片表面特性的AFM和XPS初步研究)[J].Mordern Instruments(现代仪器),2007,13(1):1-5.
[26]CHEN Jian-hua(陈建华),ZHANG Hui-qiang(张会强),ZHANG Gui-tian(张贵田).Flow and heat transfer in a mini cooling channel with artificial roughness(含人为粗糙元微小冷却通道内的流动与换热)[J].Journal of Tsinghua University(清华大学学报),2008,48(5):900-903.