Integration of Macroscopic and Microscopic Models of Air Movement in and around Buildings.

该项目为建筑物内和/或周围的空气流动提供了一种新的数值分析方法。建筑物内部和周围的气流非常复杂。为了预测如此复杂的流场的流动特性，人们进行了大量的研究。以前的研究中使用的流动模型可以分为两类，即a)基于区域良好混合的假设的单(或多)区理论，侧重于整个建筑气流系统中气流的宏观特征；b)利用流体运动的微观方程(例如，Navier-Stokes方程)的数值解来关注建筑系统小部分(例如，单房间)中气流的微观特征。在本项目中，提出了一种宏观和微观相结合的方法。通过对开窗建筑内部和周围的气流以及整个建筑气流系统中气流的分析，证明了该方法具有较高的实用性。

New Method for a numerical analysis of the air movement in and/or around buildings was developed in this project. The airflows in and around building, are very complicated. In order to predict the flow properties of such a complicated flowfield, a lot of researches has been carried out. The flow modellings used in the previous researches can be classified into two types, namely,a) models focused on the macroscopic features of the airflow in the whole building airflow systems, using single (or multi) zone theory which is based on the assumption that zones are well mixed.b) models focused on the detailed microscopic features of the airflow in small portions of building systems (e.g., single rooms) using numerical solutions to the microscopic equations of fluid motion (e.g., Navier-Stokes equations). In this project, a new method which integrates the macroscopic and microscopic approaches was developed. The high practicability of the method was confirmed by analyzing two types of flowfields, ie., the airflow in and around a building with open windows and the airflow in the whole building airflow systems.