Enhancing stability of Lattice-Boltzmann simulations via new boundary conditions

被引：0
|
作者：
De la Fuente, L
Ingram, D
Mingham, C
Causon, D
机构：
[1] Manchester Metropolitan Univ, Dept Comp & Math, Manchester M1 5GD, Lancs, England
[2] Air Prod & Chem Inc, Computat Modeling Ctr, Allentown, PA 18195 USA
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS C | 2003年 / 14卷 / 01期
关键词：
Lattice-Boltzmann; boundary conditions; Couette flow; lid-driven cavity flow; urban canyon;
D O I：
10.1142/S0129183103004176
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A new boundary condition is developed to enhance numerical stability for moving walls in lattice-Boltzmann simulations. It includes a population "adjustment" procedure at boundaries which allows stable simulations closer to the theoretical limit of tau = 0.5. Couette and lid-driven cavity flow simulations show improved velocity profiles, lower stable relaxation timestep tau and higher Reynolds number Re limits. The new method needs fewer timesteps to achieve steady-state.
引用
收藏
页码：29 / 40
页数：12
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