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Investigation of heated round jet in a cold co-flowing ambient using two turbulence models. (English) Zbl 1296.76063

Virtanen, Eetu N. (ed.), Applied mathematical modeling. New York, NY: Nova Science Publishers (ISBN 978-1-60021-975-7/hbk). 5-22 (2008).
Summary: The mean and turbulent flow properties of a turbulent heated round jet discharged in a cold co-flowing ambient of the same fluid have been obtained computationally using the standard \(k-\varepsilon\) model and Reynolds-stress transport (RST) model. The two turbulence models have been chosen to cover a wide spectrum of the modeling options that are available. The present flow configuration is an important test case for turbulence models, because it is more complex compared to that of a standard turbulent round jet in a quiescent ambient of the same fluid with both at the same temperature. The present predictions are compared with the experimental data reported in literature. The results suggest that self-preservation does not hold in this flow. Overall the \(k-\varepsilon\) model provides better agreement with the experimental data compared to that by the RST model, which overpredicts. The present chapter clearly shows that the RST model, though more elaborate, does not have an advantage over the standard \(k-\varepsilon\) model in the prediction of the present flow configuration.
For the entire collection see [Zbl 1141.76006].

MSC:

76F10 Shear flows and turbulence
76F60 \(k\)-\(\varepsilon\) modeling in turbulence
76F35 Convective turbulence
80A20 Heat and mass transfer, heat flow (MSC2010)
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