Numerical simulation of convective airflow in an empty room

Horikiri, Kana and Yao, Yufeng and Yao, Jun (2011) Numerical simulation of convective airflow in an empty room. International Journal of Energy and Environment, 5 (1). pp. 574-581. ISSN 1109-9577

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Abstract

Numerical simulation of airflow inside an empty room has been carried out for a forced convection, a natural convection and a mixed convection respectively, by using a computational fluid dynamics approach of solving the Reynolds-averaged Navier-Stokes fluid equations. Two-dimensional model was studied at first; focusing on the grid refinement, the mesh topology effect, and turbulence model influences. It was found that structured mesh results are in better agreement with available experimental measurements for all three scenarios. Further study using a three-dimensional model has shown very good agreements with test data at measuring points. Furthermore, present studies have revealed low-frequency flow unsteadiness by monitoring the time history of flow variables at measuring positions. This phenomenon has not yet reported and discussed in previous studies.

Item Type:Article
Additional Information:Numerical simulation of airflow inside an empty room has been carried out for a forced convection, a natural convection and a mixed convection respectively, by using a computational fluid dynamics approach of solving the Reynolds-averaged Navier-Stokes fluid equations. Two-dimensional model was studied at first; focusing on the grid refinement, the mesh topology effect, and turbulence model influences. It was found that structured mesh results are in better agreement with available experimental measurements for all three scenarios. Further study using a three-dimensional model has shown very good agreements with test data at measuring points. Furthermore, present studies have revealed low-frequency flow unsteadiness by monitoring the time history of flow variables at measuring positions. This phenomenon has not yet reported and discussed in previous studies.
Keywords:Room, Energy saving, Heat transfer
Subjects:H Engineering > H141 Fluid Mechanics
Divisions:College of Science > School of Engineering
ID Code:5420
Deposited By: Jun Yao
Deposited On:06 May 2012 22:53
Last Modified:13 Mar 2013 09:07

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