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基于波尔兹曼方法研究幂律流体的椭圆柱绕流

DOI: 10.6052/1000-0879-14-366, PP. 597-602

Keywords: 幂律流体,格子波尔兹曼方法,椭圆柱绕流,阻力系数

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Abstract:

基于格子波尔兹曼方法(latticeBoltzmannmethod)和幂律流体本构方程,建立二维流动模型,将充分发展的速度分布与理论解进行对比,吻合良好.对幂律流体的圆柱绕流进行模拟,采用了反弹格式的无滑移圆柱边界,并使用应力积分法计算阻力系数,分析了稳态圆柱绕流时,阻力系数随幂律指数n以及雷诺数Re的变化规律.分析了椭圆横轴/纵轴长度比和幂律指数n,对压力系数Cp和黏度系数Cv的影响.得到的变化规律与有限元方法规律一致,验证了格子波尔兹曼模型的可行性.

References

[1]  1 Williamson CHK. Vortex dynamics in the cylinder wake. Annual Review of Fluid Mechanics, 1996, 28(1): 477-539
[2]  2 Dennis SCR, Chang GZ. Numerical solutions for steady flow past a circular cylinder at Reynolds numbers up to 100. Journal of Fluid Mechanics, 1970, 42(3): 471-489
[3]  3 Kandhai D, Koponen A, Hoekstra AG, et al. LatticeBoltzmann hydrodynamics on parallel systems. Computer Physics Communications, 1998, 111(1): 14-26
[4]  4 Chen S, Doolen GD. Lattice Boltzmann method for fluid flows. Annual Review of Fluid Mechanics, 1998, 30(1):329-364
[5]  5 Mussa A, Asinari P, Luo L. Lattice Boltzmann simulations of 2D laminar flows past two tandem cylinders. Journal of Computational Physics, 2009, 228(4): 983-999
[6]  6 Ku X, Lin J. Numerical simulation of the flows over two tandem cylinders by lattice Boltzmann method. Modern Physics Letters B, 2005, 19(28-29): 1551-1554
[7]  7 董波, 李维仲, 冯玉静等. 幂律流体圆柱绕流的格子波尔兹曼模 拟. 力学学报, 2014, 46(1): 44-53
[8]  8 何雅玲, 王勇, 李庆. 格子Boltzmann 方法的理论及应用. 北 京:科学出版社, 2009
[9]  9 Boyd J, Buick J, Green S. A second-order accurate lattice Boltzmann non-Newtonian flow model. Journal of Physics A: Mathematical and General, 2006, 39(12): 14241-14247
[10]  10 Mei R, Yu D, Shyy W, et al. Force evaluation in the lattice Boltzmann method involving curved geometry. Physical Review E, 2002, 65(4): 041203
[11]  11 施卫平, 祖迎庆. 用Lattice Boltzmann 方法计算流体对曲线 边界的作用力. 吉林大学学报: 理学版, 2005, 43(2): 132-136
[12]  12 Chen S, Martinez D, Mei R. On boundary conditions in lattice Boltzmann methods. Physics of Fluids, 1996, 8(9):2527-2536
[13]  13 Nejat A, Abdollahi V, Vahidkhah K. Lattice Boltzmann simulation of non-Newtonian flows past confined cylinders. Journal of Non-Newtonian Fluid Mechanics, 2011,166(12): 689-697
[14]  14 Rao PK, Sahu AK, Chhabra RP. Flow of Newtonian and power-law fluids past an elliptical cylinder: a numerical study. Industrial & Engineering Chemistry Research, 2010,49(14): 6649-6661

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