Reversed flow calculations of high Prandtl number thermal boundary layer separation.

4th International Symposium on Transport Phenomena in Heat and Mass Transfer, University of New South Wales, Sydney, Australia. July 14-18, 1991.

J.T. Ratnanather and P.G. Daniels

A numerical and analytical study of the free convection thermal boundary layer or wall jet at finite Prandtl number is performed to understand the mechanisms of the separation of a high Prandtl number thermal boundary layer flows. The model is that adopted by Smith \& Duck (1977) in which the upstream influence delineates the flow into a `double-deck' structure with the lower deck having thickness O(R^-3/14), R being the Rayleigh number. The velocities and pressure in the lower deck are obtained thus determining the temperature distribution in the reversed flow zone. The asymptotic structure of the flow downstream of separation for the temperature is analysed indicating a functional dependence on the streamfunction in the slowly recirculating inviscid core. Click here for a PDF copy.

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