Computational Modelling of Buoyancy-Driven Flows in Highly Inclined Tall Cavities

Hector Iacovides, K Hanjalic (Editor), T Miyauchi (Editor), D Borello (Editor), M Hadzabdic (Editor), P Ventuini (Editor)

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The paper describes the application of unsteady RANS modelling to two buoyancy-driven flows in tall cavities inclined at 15o 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-epsilon 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. In the unstably stratified case both models broadly reproduce the measured unsteady flow behaviour, although the RSM gives the better quantitative results. In the stably stratified case the k-epsilon scheme does not fully capture the relatively weak 3D flow structures present, whilst the RSM does, and consequently gives generally good agreement with the measured data.
    Original languageEnglish
    Title of host publicationTurbulence Heat and Mass Transfer 8
    EditorsK Hanjalic, T Miyauchi, D Borello, M Hadzabdic, P Ventuini
    Place of PublicationNew York
    PublisherBegell House Publishers Inc.
    Pages391-394
    Number of pages4
    Publication statusPublished - 15 Sept 2015
    Event8th International Symposium on Turbulence, Heat and Mass Transfer - Sarajevo, Bosnia and Herzegovina
    Duration: 15 Sept 201518 Sept 2015

    Conference

    Conference8th International Symposium on Turbulence, Heat and Mass Transfer
    CitySarajevo, Bosnia and Herzegovina
    Period15/09/1518/09/15

    Keywords

    • Buoyancy Driven Flows
    • Unsteady RANS
    • Highly Inclined Tall Cavities

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