Heatline visualization in turbulent flow
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 1 April 1996
Abstract
The concept of a heat function is introduced to visualize the path of heat flow in a buoyancy‐driven turbulent flow heated vertical flat plate. The velocities and the temperature field near the vertical plate are predicted numerically, using an algebraic flux model of turbulent heat transport. As an accurate prediction of the turbulent heat flux is required in order to predict the heat function in the flow field, the use of an algebraic flux model for the turbulent heat transport θui, is made as compared with a simple eddy diffusivity hypothesis. The algebraic flux expression was closed with a low‐Re‐number‐k‐ε — θ2 —θ model. The solution ofthe 4 equation low‐Re‐number‐k‐ε — θ2 — εθ model predicts very well the local Nusselt number along the plate height as well as the velocity and the temperature field near the wall when compared with the experiments. Then the partial differential equation for the heat function is numerically solved to show the true path of heat flow in the buoyancy‐driven turbulent flow field near a heated vertical plate.
Keywords
Citation
Dash, S.K. (1996), "Heatline visualization in turbulent flow", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 6 No. 4, pp. 37-46. https://doi.org/10.1108/09615539610123432
Publisher
:MCB UP Ltd
Copyright © 1996, MCB UP Limited