Artificial compressibility method using bulk viscosity term for an unsteady incompressible flow simulation

被引：5

作者：

Yasuda, T. ^{[1
]}

Tanno, I. ^{[2
]}

Hashimoto, T. ^{[3
]}

Morinishi, K. ^{[4
]}

Satofuka, N. ^{[4
,5
]}

机构：

[1] Univ Shiga prefecture, Dept Mech Syst Engn, Hassaka 2500, Hikone, Shiga 5228533, Japan

[2] Tsukuba Univ Technol, 4-3-15 Amakubo, Tsukuba, Ibaraki 3058520, Japan

[3] Kindai Univ, 3-4-1 Kowakae, Higashi Osaka 5778502, Japan

[4] Kyoto Inst Technol, Sakyo Ku, Kyoto 6068585, Japan

[5] Univ Shiga Prefecture, Hikone, Japan

来源：

COMPUTERS & FLUIDS | 2023年 / 258卷

关键词：

Artificial compressibility method; Bulk viscosity; Unsteady incompressible flow; LATTICE BOLTZMANN METHOD; TURBULENT-FLOW;

D O I：

10.1016/j.compfluid.2023.105885

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

We introduced bulk viscosity term into the artificial compressibility method (ACM) for unsteady incompressible flow simulation to improve the efficiency of ACM. The stability, accuracy and computational effort were investigated by changing the Mach number, grid resolution and discretization method to clarify the bulk vis-cosity effects. ACM with bulk viscosity term (BVACM) could improve the stability and the accuracy of the ACM simulation especially for the coarse grid case. As a result, BVACM was 5.94 times faster than ACM within a permissible error of 5 percent. The three-dimensional flow structure of decaying isotropic turbulence, lid-driven cavity flow, channel flow were efficiently solved by BVACM using parallel computation.

引用

页数：9

共 20 条

[1] Quasiequilibrium lattice Boltzmann models with tunable bulk viscosity for enhancing stability [J].