NUMERICAL-SIMULATION OF FREE CONVECTIVE FLOW USING THE LATTICE-BOLTZMANN SCHEME
NUMERICAL-SIMULATION OF FREE CONVECTIVE FLOW USING THE LATTICE-BOLTZMANN SCHEME
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DOI：
10.1016/0142-727x(95)00052-r
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发表时间：
1995-10-01
影响因子：
2.6
通讯作者：
SOMERS, JA
中科院分区：
文献类型：
--
作者：
EGGELS, JGM;SOMERS, JA
本文采用格子Boltzmann离散格式研究了Ra = 10（6），Pr = 0.71时方腔中的自由对流流动。该格式是求解不可压流场中含时Navier-Stokes方程的一种新型数值模拟方法。它已被扩展的标量输运方程和耦合的标量与动量方程，使非等温流动的模拟。一个相当简单的流动配置与固定的温度垂直壁和绝热水平壁已被选为一个测试案例，研究扩展的格子Boltzmann格式的性能。不同区域的对流，如垂直和水平的边界层和核心区域的相关的各种流量，同意与基准数据和展示的潜力的格子玻尔兹曼计划的数值模拟流（多组分）标量运输。
Free convective flow in a square cavity at Ra = 10(6) and Pr = 0.71 is considered using the lattice-Boltzmann discretization scheme. This scheme is a new type of simulation method for solving the time-dependent Navier-Stokes equations in an incompressible flow regime. It has been extended by a scalar transport equation and by a coupling of the scalar quantity with the momentum equations to enable simulations of nonisothermal flows. A fairly simple flow configuration with fixed temperature vertical walls and adiabatic horizontal walls has been selected as a test case to study the performance of the extended lattice-Boltzmann scheme. Various flow quantities related to different regions of the convective flow, such as vertical and horizontal boundary layers and the core region, agree well with benchmark data and demonstrate the potential of the lattice-Boltzmann scheme for numerical simulations of flows with (multicomponent) scalar transport.