Nielsen P V
Aalborg University and International Center for Indoor Environment and Energy, Denmark.
Indoor Air. 2004;14 Suppl 7:134-43. doi: 10.1111/j.1600-0668.2004.00282.x.
Computational Fluid Dynamics (CFD) and new developments of CFD in the indoor environment as well as quality considerations are important elements in the study of energy consumption, thermal comfort and indoor air quality in buildings. The paper discusses the quality level of Computational Fluid Dynamics and the involved schemes (first, second and third order schemes) by the use of the Smith and Hutton problem on the mass fraction transport equation. The importance of "false" or numerical diffusion is also addressed in connection with the simple description of a supply opening. The different aspects of boundary conditions in the indoor environment as, e.g., the simulation of Air Terminal Devices and the simulation of furnishings and occupants are discussed. The prediction of the flow in a room with a three-dimensional wall jet by the use of different turbulence models such as the k-epsilon model, the V2-f model and the Reynolds Stress model is addressed in the last chapter of the paper.
The use of computational Fluid Dynamics as a practical design method for room air distribution is widespread. It is important to consider the quality of the predictions in order to obtain a sufficient level of accuracy. It is also important to work with a practical description of supply openings as well as with the right level of details in the occupied zone and the right turbulence model. All these aspects are addressed in the article.
计算流体动力学（CFD）及其在室内环境中的新发展以及质量考量是建筑能耗、热舒适度和室内空气质量研究中的重要因素。本文通过对质量分数输运方程使用史密斯和赫顿问题，讨论了计算流体动力学的质量水平以及所涉及的格式（一阶、二阶和三阶格式）。还结合送风开口的简单描述讨论了“虚假”或数值扩散的重要性。讨论了室内环境中边界条件的不同方面，例如空气末端装置的模拟以及家具和人员的模拟。本文最后一章探讨了使用不同的湍流模型（如k-ε模型、V2-f模型和雷诺应力模型）对具有三维壁面射流的房间内气流的预测。
将计算流体动力学用作房间空气分布的实际设计方法已广泛应用。为了获得足够的精度水平，考虑预测质量很重要。对送风开口进行实际描述以及在人员活动区域使用合适的细节水平和正确的湍流模型也很重要。本文讨论了所有这些方面。
