Towards the Development of RANS Models for Conjugate Heat Transfer

Tim Craft, Hector Iacovides, S Uapipatanakul, K Hanjalic (Editor), Y Nagano (Editor), S Jakirlic (Editor)

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    The study is concerned with exploring the ability of eddy-viscosity based RANS models to compute conjugate heat transfer problems, and to capture the decay of turbulent temperature fluctuations across the wall region. This is done by extending the application of the modelled transport equations for temperature variance and its dissipation rate across the solid wall region. Comparisons are drawn with existing DNS data of plane channel flow, heated through a wall of nonzero thickness. Cases are simulated covering a range of solid/fluid thermal conductivity/diffusivity ratios. It is found that, in order to predict the correct decay of temperature variance across the wall, an accurate representation of it, and its dissipation rate, in the near-wall fluid flow region is required. This, in turn, requires an accurate representation of the near-wall dynamic field turbulence. A number of modifications are proposed to an existing four-equation model, k-epsilon, theta square and epsilon-theta, in order to provide good near-wall redictions under the two limiting thermal boundary treatments of isothermal and isoflux wall conditions. The resulting scheme is shown also to perform well in the fully conjugate heat transfer problems.
    Original languageEnglish
    Title of host publication'Turbulence, Heat and Mass Transfer 6
    EditorsK Hanjalic, Y Nagano, S Jakirlic
    PublisherBegell House Publishers Inc.
    Number of pages4
    ISBN (Print)978-1-56700-262-1
    Publication statusPublished - Sept 2009
    Event6th International Symposium \on Turbulence, Heat and Mass Transfer - Rome
    Duration: 14 Sept 200918 Sept 2009

    Publication series

    NameInternational Symposium on 'Turbulence, Heat and Mass Transfer


    Conference6th International Symposium \on Turbulence, Heat and Mass Transfer
    Internet address


    • Conjugate Heat Transfer, Turbulence, Temperature Variance, Turbulence Modelling


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