建筑室内环境数值方法的研究──三维紊流室内气流动态数值研究

Basic Numerical study on Indoor Environment──Three-Dimensional Turbulent flow Numerical Research of Indoor Air flow Research of Indoor Air flow

本文尝试用数值计－算法取代传统方法研究室内气流组织。采用足ｋ－ε双方程紊流数学模型，用控制容积法离散原始方程，实现了在任意外界条件作用下对室内气流组织的三维紊流数值模拟。作出了速度矢量分布图和温度等值线图。并且，从物理意义和数值方法两方面仔细考虑了边界条件的处理，提出了较好的解决方案。将数值计算结果与可视化实验和理论公式计算数据作比较，发现三者的数据分布规律基本一致，证明了计算结果的正确性和可行性，从而为室内气流的研究和优化设计提供了一种新的科学方法。

This paper aims at applying numerical method to study indoor air environment.k-ε two- equations turbulence matliematic model is introduced.CVM is adoptedfor discretization of space derivative in primitive equations. Based on these,three- dimen- sional numerical simulation of indoor air flow under arbitrary external conditions is carried out.The numerical results such as velocity vector and temperature are also visualized as suggestive images through computer graphics,The auther has carefully considered the treatment of boundary condition from tl1e viewpoint of physical idea and numerical method and a better method is proposed. Comparing the numerical results with that of flow visualization experiments andthat calculated from experiential formulae,we can find that these data are basically identical and that numerical simulation has achieved satisfactory effect.Therefore,thispaper offers are effective approach for the study of indoor air flow and optimal design.