应用 K-ε 模型模拟三维分层流

A 3 D numerical method for stratified flow with k ε model

本文引用涡粘性和涡扩散的假定建立了模拟分层流Ｋε模型．该模型综合考虑了分层流的特点和密度变化的影响．并对ｖｔ中的Ｃμ进行了浮力修正．从所建立的数学模型出发．采用ＳＩＭＰＬＥ方法求解速度和压力耦合的方程组，模拟了矩形池的流场、温度场及温差分层流，计算模拟温度场分布与实验观测基本符合，并较好地反映了分层流的密度效应．

Based on the assumption of viscosity and diffusion of vortex,a numerical method based on k ε model for 3 D stratified flow is developed.The characteristics of stratified flow and the effect of non homogeneous density are to be considered and the parameter C μ in Vt is modified according to the buoyant effect.The SIMPLE method is adopted to solve velocity and pressure equations.The flow field and temperature distribution in a water cooling basin are modeled as an example to illustrate this method.It is shown that the computed results are in good agreement with the experiment data.