Improving predictions of heat transfer in indoor environments with eddy viscosity turbulence models
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- 作者：Christian Heschl ; Yao Tao ; Kiao Inthavong ; Jiyuan Tu
- 关键词：convection heat transfer ; v 2–f model ; turbulent ; natural convection
- 刊名：Building Simulation
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：9
- 期：2
- 页码：213-220
- 全文大小：3,419 KB
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Yao Tao (2)
Kiao Inthavong (2)
Jiyuan Tu (2)
1. Fachhochschulstudiengaenge Burgenland, University of Applied Science, Steinamangerstraße 21, Pinkafeld, 7423, Austria
2. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, PO Box 71, Plenty Road, Bundoora, Victoria, 3083, Australia - 刊物类别：Engineering
- 刊物主题：Building Construction, HVAC and Refrigeration
Engineering Thermodynamics and Transport Phenomena
Atmospheric Protection, Air Quality Control and Air Pollution
Environmental Computing and Modeling
Chinese Library of Science - 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
- ISSN：1996-8744
文摘
Heat transfer modelling in indoor environments requires an accurate prediction of the convective heat transfer phenomenon. Because of the lower computational cost and numerical stability, eddy viscosity turbulence models are often used. These models allow modification to turbulent Prandtl number, and near wall correction which influences stagnation points, entrainment, and velocity and time scales. A modified v 2–f model was made to correct the entrainment behaviour in the near wall and at the stagnation point. This new model was evaluated on six cases involving free and forced convection and room airflow scenarios and compared with the standard k–ε, and k–ω–SST models. The results showed that the modification to the v 2–f model provided better predictions of the buoyant heat transfer flows while the standard k–ε failed to reproduce and underestimate the convective heat transfer. The k–ω–SST model was able to predict the flow field well only for a 2D square cavity room, and 3D partitioned room case, while it was poor for the other four cases. Keywords convection heat transfer v 2–f model turbulent natural convection