室内空气流动数值模拟的误差预处理法

Error-pretreatment method for numerical simulation of indoor air flow

为加快室内空气流动数值模拟计算收敛速度 ,基于多重网格法关于高频和低频误差的思想 ,采用误差预处理法对室内空气流动的离散代数方程组进行由粗到细网格上的迭代求解。用该方法和传统迭代法对室内空气等温和非等温流动分别进行模拟 ,其对比结果表明 ,误差预处理算法显著提高室内空气流动数值模拟的收敛速度 ,可将收敛时间减小到原来的 1/ 3～ 1/

Since the multigrid method is not proper for numerical procedures based on SIMPLE, a simpler and more effective algorithm to solve the algebraic equations, the errorpretreatment method, is proposed to accelerate convergence for indoor air flow simulation. The algorithm is based on the theory that iteration errors can be divided into high frequency and low frequency ones. Two isothermal and nonisothermal indoor airflow examples were simulated with this method and the conventional iteration method. The errorpretreatment method improves the convergence speed for numerical simulation of indoor airflow by reducing convergence time by 1/2~1/3.