现代中庭的烟雾管理系统通常比较复杂和不规则，可以使用计算流体动力学（CFD）模型进行设计。近年来，由于易于使用高性能计算机和CFD程序，CFD变得非常流行。本文介绍了CFD模型中使用的一些基本概念，并描述了它们的局限性和对模型预测的影响。重新审视了基本模型技术，包括多重网格、网格拉伸技术、单元纵横比、被动边界和热边界条件。通过考虑使用NIST火灾动力学模拟器（FDS）进行的简单中庭火灾模拟，研究了这些参数对结果的影响。单位:SICitation:ASHRAE Transactions，第115卷，pt。2009年1月1日，芝加哥

Smoke management systems in modern atria, which are often complex and irregular, can be designed by the use of Computational Fluid Dynamics (CFD) models. In recent years, CFD has become very popular thanks to easy access to high-performance computers and the availability of CFD programs. This paper presents some fundamental concepts used in CFD models, and describes their limitations and impacts on model predictions. Basic model techniques are reexamined which include multi meshes, grid stretching techniques, cell aspect ratio, passive boundaries and thermal boundary conditions. The impact of these parameters on the results is investigated by considering simple atrium fire simulations conducted using the NIST’s Fire Dynamics Simulator (FDS).Units: SI