摘要
大空间建筑中有害气体的扩散和输运过程为低速流动(马赫数M<<1),呈不可压缩或弱可压缩(WeaklyCompressible)特性,这类问题的实验研究和数值模拟均存在不少问题和困难。本文分析了此类问题研究方法的现状,系统地分析和比较了场模拟常用数值方法的特点,以及不同湍流模式的适用性。分析表明采用LES的场模拟方法是研究此类问题行之有效的方法,亚格子尺度模型是此类方法应用需重点考虑的因素。
The diffusion and conveyance of harmful gas in large space buildings is low velocity flow (the Mach number M<<l), which is incompressible or weakly compressible. There are many problems and difficulties in the experimental research and numerical simulation of it. The situation of research methods about this kind of problem was analyzed, the characteristics of numerical methods commonly used in field simulation were compared systemically and the applicability of different turbulence models was analyzed in this paper. The result showed the field simulation method using LES is an effective method and sub-grid scale model is an important factor.
出处
《建筑热能通风空调》
2005年第2期19-23,共5页
Building Energy & Environment
基金
国家重点实验室LAPC基金项目(LAPC-KF-2003-12)湖南省教育厅基金项目(03C404)
