Lattice Boltzmann Simulation of Two-Phase Viscoelastic Fluid Flows
Lattice Boltzmann Simulation of Two-Phase Viscoelastic Fluid Flows
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DOI：
10.1299/jcst.2.330
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
M. Yoshino;Yasuyuki Toriumi;M. Arai
中科院分区：
文献类型：
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作者：
M. Yoshino;Yasuyuki Toriumi;M. Arai
提出了一种用于两相粘弹性流体流动的格子玻尔兹曼方法（LBM）。该方法主要是Inamuro等人提出的大密度差两相流LBM的扩展。 [计算物理学杂志卷。 198，第 2 期（2004 年），第 628-644 页]。粘弹性效应是通过基于麦克斯韦模型的本构方程引入的，该模型具有串联的弹簧和缓冲器。该方法适用于模拟粘弹性流体中剪切流下的液滴和粘弹性流体中气泡的上升。在剪切流下液滴变形的模拟中，评估了粘弹性对变形和取向角的影响。在粘弹性流体中气泡上升的模拟中，研究了后缘处的尖点配置，并将其与理论预测和其他数值结果进行了比较。
A lattice Boltzmann method (LBM) for two-phase viscoelastic fluid flows is proposed. The method is mainly an extension of the LBM for two-phase flows with large density differences proposed by Inamuro et al. [Journal of Computational Physics Vol. 198, No. 2 (2004), pp. 628-644]. The viscoelastic effects are introduced by the constitutive equation based on the Maxwell model, which has a spring and a dashpot connected with each other in series. The method is applied to simulations of a drop under shear flow in viscoelastic fluids and of a bubble rising in viscoelastic fluids. In the simulation of drop deformation under shear flows, the effects of viscoelasticity on the deformation and orientation angle are evaluated. In the simulation of bubble rising in viscoelastic fluids, a cusp configuration at the trailing edge is investigated and compared with the theoretical prediction and other numerical results.