室内污染物质扩散数值模拟的有限元法

介绍了一种预测室内空气污染浓度分布的数值方法，算法有一定特点，即：流动用时均流方程及ｋ—ε模型来描述，用有限元法离散基本方程，用罚函数法处理不可压缩条件，与罚函数对应的项采用降阶积分，对ｕ—ｖ方程与ｋ—ε方程交替进行计算。用作者编制的程序对室内有污染源时污染物质的扩散进行了计算，与国外的同类计算相比，结果较好。

The Finite Element Method for Numerical Simulation of Pollutant Diffusion in a Room

This paper describes a numerical method for predicting the concentration for airs pollutant in a room. The flow is described by the the averaged mean flow equations expressing conservation of mass and momentum,supplemented by the k εturbulence closure model. The finite element method is applied to discretize the basic equations. The penalty function method is applied to deal with the incompressible condition, and the terms connected with the penalty function are integrated by reducing order method. The u v equations and the k εequations are solved alternately until a fully converged solution is obtained. As an example, pollutant diffusion is computed When there is a pollutant source in a room and the results are better than that of the foreign country.