A numerical investigation on the fluid flow and heat transfer in the confined impinging slot jet in the low Reynolds number region for different channel heights

The numerical solution is obtained for unsteady two-dimensional fluid flow and heat transfer in a confined impinging slot jet using the finite volume method. In order to consider the effect of Reynolds number and height ratio on the flow and temperature fields in the channel, the numerical simulatio...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2008-07, Vol.51 (15-16), p.4055-4068
Main Authors: Lee, H.G., Yoon, H.S., Ha, M.Y.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Heat transfer
Jets
Physics
Theoretical studies. Data and constants. Metering
Turbulent flows, convection, and heat transfer
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Summary:The numerical solution is obtained for unsteady two-dimensional fluid flow and heat transfer in a confined impinging slot jet using the finite volume method. In order to consider the effect of Reynolds number and height ratio on the flow and temperature fields in the channel, the numerical simulations were performed for different Reynolds numbers of 50–500 and different height ratios of 2–5. The critical Reynolds number, beyond which the flow and thermal fields change their state from steady to unsteady, depends on the Reynolds number and height ratio. The unsteadiness gives a big impact on the flow and temperature fields and as a result the pressure coefficient, skin friction coefficient and Nusselt number in the unsteady region show different characteristics from those in the steady region.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2008.01.015