基于室外气象信息的CFD室内环境模拟

在使用计算流体动力学（CFD）设计室内环境时,一些包含外墙的房间的热边界条件较难给定,因为外墙的内壁面除了要受到室内热源和气流的影响外很大程度上还要受到室外气象条件的影响。本文提出一种基于室外气象信息的CFD边界条件给定方式,针对一个包含外墙的办公室算例进行模拟,计算结果表明外墙内壁面的温度和热流密度分布很不均匀,但通过本文提出的模拟方法只需根据室外气象信息来给定外墙外壁面的热边界条件,就可以获得比较准确的外墙内壁面的温度和热流密度分布以及室内环境的温度分布信息,便于研究与设计人员使用。

CFD Modeling of an Indoor Space by Specifying Outdoor Climatic Information

When applying CFD to design an indoor environment, the thermal boundary conditions of interior surfaces of some external walls are not known because they are closely related to the outdoor climate. This investigation proposes a method to specify thermal boundary conditions to the exterior surfaces of the external walls based on the outdoor climatic information. An office environment including one external wall is modeled. The simulation results show that the distribution of surface temperatures and surface heat fluxes on interior surfaces of the external wall is highly non-uniform. However, with this method, the detailed thermal conditions on the interior surface of the external wall can be conveniently obtained, which is very helpful for designing.