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Study of the erosion of stably stratified medium heated from below

Sreenivas, KR and Dey, PK and Arakeri, Jaywant H and Srinivasan, J (1995) Study of the erosion of stably stratified medium heated from below. In: Fourteenth International Conference on Numerical Methods in Fluid Dynamics. Proceedings of the Conference, 11-15 July 1994, Bangalore, India, pp. 551-555.

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Abstract

We present, results from a two dimensional numerical simulation of a stably stratified layer heated from below. The aim of the simulation is to study the mechanism of erosion of a stably stratified medium by the convective velocity. We solve transport equations for momentum, heat and species using Patankar's SIMPLER method. Tracer particles are used to get flow pattern inside the mixed layer and in the gradient zone. We have observed randomly moving thermals issuing from the bottom heated surface and from the interface separating the mixed layer and the gradient zone. Stable fluid from the gradient zone gets entrained into the mixed layer with the falling thermal from the interface. This is the main mechanism of the turbulent entrainment. Results from the numerical simulation indicate the need to include the effects of the turbulent entrainment in modelling the equilibrium condition

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Springer-Verlag
Keywords: boundary layer turbulence;convection;erosion;finite difference methods;flow simulation;stratified flow
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 25 Sep 2007
Last Modified: 19 Sep 2010 04:38
URI: http://eprints.iisc.ernet.in/id/eprint/10983

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