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A new turbulence model for the axisymmetric plume

Dewan, Anupam and Arakeri, Jaywant H and Srinivasan, J (1997) A new turbulence model for the axisymmetric plume. In: Applied Mathematical Modelling, 21 (11). pp. 709-719.

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Abstract

A new turbulence model has been proposed for the axisymmetric plume. In this model the equations for the turbulent kinetic energy (k), its dissipation $(\varepsilon)$, temperature fluctuations $\overline{(t^{'2})}$, and intermittency $(\gamma)$ have been solved. The equation for the dissipation $(\varepsilon)$ accounts for the effect of entrainment, which in turn requires the solution of a transport equation for the intermittency. The effect of buoyancy on Reynolds stress and radial heat flux has been modelled by the algebraic stress model (ASM). For the buoyancy production of turbulent kinetic energy a simple model (which assumes it to be proportional to $\sqrt{k\overline{t^'2}}$) has been used. A detailed comparison of the predictions has been made with measurements. The present $k - \varepsilon - \overline{t^{'2}} - \gamma$ model is shown to simulate accurately the intermittency and the effects of buoyancy on mean and turbulent quantities.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Buoyancy;Intermittency;Entrainment;k-e model;Algebraic stress model
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 22 Feb 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ernet.in/id/eprint/9997

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