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A zero-equation turbulence model for indoor airflow simulation

Chen, Q., Xu, W.
1998
Energy and Buildings, 28(2): 137-144

Chen, Q., Xu, W., (1998), "A zero-equation turbulence model for indoor airflow simulation", Energy and Buildings, 28(2): 137-144.
Abstract:
At present, Computational-Fluid-Dynamics (CFD) with the ¡®standard' k-var epsilon model is a popular method for numerical simulation of room airflow. The k-var epsilon model needs a lot of computing time and large a computer. This paper proposes a new zero-equation model to simulate three dimensional distributions of air velocity, temperature, and contaminant concentrations in rooms. The method assumes turbulent viscosity to be a function of length-scale and local mean velocity. The new model has been used to predict natural convection, forced convection, mixed convection, and displacement ventilation in a room. The results agree reasonably with experimental data and the results obtained by the standard k-var epsilon model. The zero-equation model uses much less computer memory and the computing speed is at least 10 times faster, compared with the k-var epsilon model. The grid size can often be reduced so that the computing time needed for a three-dimensional case can be a few minutes on a PC.

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Author Information and Other Publications Notes
Chen, Q.
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088, USA http://widget.ecn.purdue.edu/~yanchen/
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Xu, W.
     


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