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

在这个项目中，开发了一种新的方法，用于数值分析建筑物内和/或周围的空气流动。建筑物内部和周围的空气流动非常复杂。为了预测这种复杂流场的流动特性，人们进行了大量的研究。以往研究中采用的流动模型可分为两类，即：a）侧重于整个建筑物气流系统中气流的宏观特征的模型，采用基于区域充分混合假设的单（或多）区理论; B）侧重于建筑物系统中小部分气流的详细微观特征的模型（例如，单个房间）使用流体运动的微观方程的数值解（例如，Navier-Stokes方程）。在这个项目中，开发了一种新的方法，它结合了宏观和微观的方法。通过对两种流场的分析，窗户打开的建筑物内部和周围的气流以及整个建筑物气流系统中的气流。

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.