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Combined free and forced convection flow in a cooled vertical duct with internal solidification

Weigand, B. and Neumann, O. and Strohmayer, T. and Beer, H. (1995):
Combined free and forced convection flow in a cooled vertical duct with internal solidification.
In: Heat and Mass Transfer, pp. 349-359, 30, (5), ISSN 0947-7411, [Online-Edition: http://dx.doi.org/10.1007/BF01463926],
[Article]

Abstract

The effect of mixed convection flow on the shape of the frozen crust in a cooled vertical channel was investigated numerically. For the prediction of the ice-layer thickness a simple numerical model which is based on the boundary layer equations was used. It can be seen that in case of assisting mixed convection flow the heat transfer at the solid crust increases because of inreasing velocity near the solid-liquid interface. On the other hand this increase of the velocity near the solid-liquid interface can lead to flow separation in the core region of the channel because of continuity of mass. By comparing the numerically obtained results for aiding mixed flow with measurements of Campbell and Incropera 10 good agreement can be observed. In case of opposing mixed flow it can be shown that flow separation might occur near the solid-liquid interface. This can result in a wave-like structure of the ice-layer.

Item Type: Article
Erschienen: 1995
Creators: Weigand, B. and Neumann, O. and Strohmayer, T. and Beer, H.
Title: Combined free and forced convection flow in a cooled vertical duct with internal solidification
Language: English
Abstract:

The effect of mixed convection flow on the shape of the frozen crust in a cooled vertical channel was investigated numerically. For the prediction of the ice-layer thickness a simple numerical model which is based on the boundary layer equations was used. It can be seen that in case of assisting mixed convection flow the heat transfer at the solid crust increases because of inreasing velocity near the solid-liquid interface. On the other hand this increase of the velocity near the solid-liquid interface can lead to flow separation in the core region of the channel because of continuity of mass. By comparing the numerically obtained results for aiding mixed flow with measurements of Campbell and Incropera 10 good agreement can be observed. In case of opposing mixed flow it can be shown that flow separation might occur near the solid-liquid interface. This can result in a wave-like structure of the ice-layer.

Journal or Publication Title: Heat and Mass Transfer
Volume: 30
Number: 5
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Date Deposited: 26 Feb 2015 16:52
Official URL: http://dx.doi.org/10.1007/BF01463926
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