基于格子法的平直通道内流体流动规律模拟研究

Simulation Study on the Liquid Flow Regular in a Flat Channel with Lattice Method

针对二维平直管道内流体流动规律,采用格子Boltzmann方法进行计算并对模拟结果进行分析。结果表明,雷诺数越大,模型中间区域的速度越小,边界区域的速度越大;在同一雷诺数下,流体在纵向上的速度呈锥形分布,中间区域速度比较大,越靠近边界速度越小,边界处的速度为0。

Based on the lattice Boltzmann method, the liquid flow in a flat channel was simulated and the results of simulation were analyzed. The results show that： in the longitudinal, with higher Reynolds number, the lower speed in the middle area, the speed is higher at the border area; under the same Reynolds number, in the longitu- dinal, the distribution of the velocity is a cone, and the velocity is larger in the middle of the area than at the bor- der area. The closer to the boundary, velocity is smaller and the velocity is zero at the boundary.