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Computational modelling of buoyancy-driven flows in highly inclined tall cavities

Timothy J. Craft
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, PO Box 88, Manchester M13 9PL, UK

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

Ali Omranian
Turbulence Mechanics Group, School of Mechanical, Aerospace & Civil Engineering, The University of Manchester, Manchester M13 9PL, UK

Аннотация

The paper describes the application of unsteady RANS modelling to two buoyancy-driven flows in tall cavities inclined at 15° to the horizontal. In the first case the lower cavity surface is heated, and the upper cooled, resulting in unstable stratification, and in the second case the heating pattern is reversed. A k-ε and a stress transport model are used, together with an advanced wall-function approach, and comparisons are made to both experimental measurements and LES results, in order to assess to what extent the models reproduce the complex unsteady and three-dimensional flow patterns present.

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