Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395
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摘要
A direct-forcing fictitious domain(DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence(including the mean velocity,the root mean square(RMS) of the velocity fluctuation, the probability density function(PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Re_τ = 395 are significantly smaller than those at Re_τ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices,and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number.
A direct-forcing fictitious domain(DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence(including the mean velocity,the root mean square(RMS) of the velocity fluctuation, the probability density function(PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Re_τ = 395 are significantly smaller than those at Re_τ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices,and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number.
A direct-forcing fictitious domain(DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence(including the mean velocity,the root mean square(RMS) of the velocity fluctuation, the probability density function(PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Re_τ = 395 are significantly smaller than those at Re_τ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices,and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number.
引文
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[15] LIN, Z., YU, Z., SHAO, X., and WANG, L. P. Effects of finite-size neutrally buoyant particles on the turbulent flows in a square duct. Physics of Fluids, 29, 103304(2017)
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[17] FORNARI, W., KAZEROONI, H. T., HUSSONG, J., and BRANDT, L. Suspensions of finite-size neutrally buoyant spheres in turbulent duct flow. Journal of Fluid Mechanics, 851, 148–186(2018)
[18] WANG, G., ABBAS, M., and CLIMENT, E. Modulation of large-scale structures by neutrally buoyant and inertial finite-size particles in turbulent Couette flow. Physical Review Fluids, 2,084302(2017)
[19] WANG, G., ABBAS, M., YU, Z., PEDRONO, A., and CLIMENT, E. Transport of finite-size particles in a turbulent Couette flow:the effect of particle shape and inertia. International Journal of Multiphase Flow, 107, 168–181(2018)
[20] YU, Z. and SHAO, X. A direct-forcing fictitious domain method for particulate flows. Journal of Computational Physics, 227, 292–314(2007)
[21] GLOWINSKI, R., PAN, T. W., HESLA, T. I., and JOSEPH, D. D. A distributed Lagrange multiplier/fictitious domain method for particulate flows. International Journal of Multiphase Flow, 25, 755–794(1999)
[22] YU, Z., LIN, Z., SHAO, X., and WANG, L. P. A parallel fictitious domain method for the interfaceresolved simulation of particle-laden flows and its application to the turbulent channel flow. Engineering Applications of Computational Fluid Mechanics, 10, 160–170(2016)
[23] IWAMOTO, K., SUZUKI, Y., and KASAGI, N. Database of fully developed channel flow. THTLAB Internal Report(ILR-0201), University of Tokyo(2002)
[24] RADIN, I., ZAKIN, J. L., and PATTERSON, G. K. Drag reduction in solid-fluid systems. AIChE Journal, 21, 358–371(1975)
[25] ZHAO, L., ANDERSSON, H. I., and GILLISSEN, J. J. J. Turbulence modulation and drag reduction by spherical particles. Physics of Fluids, 22, 081702(2010)
[26] ZHOU, J., ADRIAN, R. J., BALACHANDAR, S., and KENDALL, T. M. Mechanisms for generating coherent, packets of hairpin vortices in channel flow. Journal of Fluid Mechanics, 387,353–396(1999)
[27] DINAVAHI, S. P. G., BREUER, K. S., and SIROVICH, L. Universality of probability density functions in turbulent channel flow. Physics of Fluids, 7, 1122–1129(1995)
[2] ZHAO, L., CHALLABOTLA, N. R., ANDERSSON, H. I., and VARIANO, E. A. Rotation of nonspherical particles in turbulent channel flow. Physical Review Letters, 115, 244501(2015)
[3] LIU, C., TANG, S., and DONG, Y. Effect of inertial particles with different specific heat capacities on heat transfer in particle-laden turbulent flow. Applied Mathematics and Mechanics(English Edition), 38(8), 1–10(2017)https://doi.org/10.1007/s10483-017-2224-9
[4] BALACHANDAR, S. and EATON, J. K. Turbulent dispersed multiphase flow. Annual Review of Fluid Mechanics, 42, 111–133(2010)
[5] LUCCI, F., FERRANTE, A., and ELGHOBASHI, S. Modulation of isotropic turbulence by particles of Taylor length-scale size. Journal of Fluid Mechanics, 650, 5–55(2010)
[6] GAO, H., LI, H., and WANG, L. P. Lattice Boltzmann simulation of turbulent flow laden with finite-size particles. Computers and Mathematics with Applications, 65, 194–210(2013)
[7] UHLMANN, M. Interface-resolved direct numerical simulation of vertical particulate channel flow in the turbulent regime. Physics of Fluids, 20, 053305(2008)
[8] WU, T., SHAO, X., and YU, Z. Fully resolved numerical simulation of turbulent pipe flows laden with large neutrally-buoyant particles. Journal of Hydrodynamics, 23, 21–25(2011)
[9] SHAO, X., WU, T., and YU, Z. Fully resolved numerical simulation of particle-laden turbulent flow in a horizontal channel at a low Reynolds number. Journal of Fluid Mechanics, 693, 319–344(2012)
[10] PICANO, F., BREUGEM, W. P., and BRANDT, L. Turbulent channel flow of dense suspensions of neutrally buoyant spheres. Journal of Fluid Mechanics, 764, 463–487(2015)
[11] WANG, L. P., PENG, C., GUO, Z., and YU, Z. Flow modulation by finite-size neutrally buoyant particles in a turbulent channel flow. ASME Journal of Fluids Engineering, 138(4), 041306(2016)
[12] YU, W., VINKOVIC, I., and BUFFAT, M. Finite-size particles in turbulent channel flow:quadrant analysis and acceleration statistics. Journal of Turbulence, 17, 1048–1071(2016)
[13] YU, Z., LIN, Z., SHAO, X., and WANG, L. P. Effects of particle-fluid density ratio on the interactions between the turbulent channel flow and finite-size particles. Physical Review E, 96, 033102(2017)
[14] ARDEKANI, M. N., COSTA, P., BREUGEM, W. P., PICANO, F., and BRANDT, L. Drag reduction in turbulent channel flow laden with finite-size oblate spheroids. Journal of Fluid Mechanics,816, 43–70(2017)
[15] LIN, Z., YU, Z., SHAO, X., and WANG, L. P. Effects of finite-size neutrally buoyant particles on the turbulent flows in a square duct. Physics of Fluids, 29, 103304(2017)
[16] LIN, Z., SHAO, X., YU, Z., and WANG, L. P. Effects of finite-size heavy particles on the turbulent flows in a square duct. Journal of Hydrodynamics, 29, 272–282(2017)
[17] FORNARI, W., KAZEROONI, H. T., HUSSONG, J., and BRANDT, L. Suspensions of finite-size neutrally buoyant spheres in turbulent duct flow. Journal of Fluid Mechanics, 851, 148–186(2018)
[18] WANG, G., ABBAS, M., and CLIMENT, E. Modulation of large-scale structures by neutrally buoyant and inertial finite-size particles in turbulent Couette flow. Physical Review Fluids, 2,084302(2017)
[19] WANG, G., ABBAS, M., YU, Z., PEDRONO, A., and CLIMENT, E. Transport of finite-size particles in a turbulent Couette flow:the effect of particle shape and inertia. International Journal of Multiphase Flow, 107, 168–181(2018)
[20] YU, Z. and SHAO, X. A direct-forcing fictitious domain method for particulate flows. Journal of Computational Physics, 227, 292–314(2007)
[21] GLOWINSKI, R., PAN, T. W., HESLA, T. I., and JOSEPH, D. D. A distributed Lagrange multiplier/fictitious domain method for particulate flows. International Journal of Multiphase Flow, 25, 755–794(1999)
[22] YU, Z., LIN, Z., SHAO, X., and WANG, L. P. A parallel fictitious domain method for the interfaceresolved simulation of particle-laden flows and its application to the turbulent channel flow. Engineering Applications of Computational Fluid Mechanics, 10, 160–170(2016)
[23] IWAMOTO, K., SUZUKI, Y., and KASAGI, N. Database of fully developed channel flow. THTLAB Internal Report(ILR-0201), University of Tokyo(2002)
[24] RADIN, I., ZAKIN, J. L., and PATTERSON, G. K. Drag reduction in solid-fluid systems. AIChE Journal, 21, 358–371(1975)
[25] ZHAO, L., ANDERSSON, H. I., and GILLISSEN, J. J. J. Turbulence modulation and drag reduction by spherical particles. Physics of Fluids, 22, 081702(2010)
[26] ZHOU, J., ADRIAN, R. J., BALACHANDAR, S., and KENDALL, T. M. Mechanisms for generating coherent, packets of hairpin vortices in channel flow. Journal of Fluid Mechanics, 387,353–396(1999)
[27] DINAVAHI, S. P. G., BREUER, K. S., and SIROVICH, L. Universality of probability density functions in turbulent channel flow. Physics of Fluids, 7, 1122–1129(1995)