Test of several versions for the k– ε type turbulence modelling of internal mixed convection flows

The problem of confined, mixed convection airflow generated by two non-isothermal plane wall jets was investigated numerically and experimentally. Measurements of the velocity and temperature fields in a 1×1 m 2 cross-section cavity are reported. Eight low-Reynolds-number k– ε turbulence models were...

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Bibliographic Details
Published in:International journal of heat and mass transfer 1999, Vol.42 (23), p.4391-4409
Main Authors: Costa, J.J., Oliveira, L.A., Blay, D.
Format: Article
Language:English
Subjects:
Confined flow
Jets
Mathematical models
Reynolds number
Turbulent flow
Wall flow
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Summary:The problem of confined, mixed convection airflow generated by two non-isothermal plane wall jets was investigated numerically and experimentally. Measurements of the velocity and temperature fields in a 1×1 m 2 cross-section cavity are reported. Eight low-Reynolds-number k– ε turbulence models were comparatively tested, together with a simplified version of the two-layer wall-function model of Chieng and Launder. Particular attention was given to the mean and turbulent quantities across the wall jet flows, and to the evaluation of the wall heat transfer. The low- Re model of Nagano and Hishida provided satisfactory results, which were still improved with two further modifications.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(99)00075-7