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Cyclic conjugate heat transfer

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Old   December 30, 2021, 10:55
Default Cyclic conjugate heat transfer
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I am investigating water flow through a heated internally rifled tube, using chtMultiRegionSimpleFoam (modelling heat transfer in both water and the tube). Until now I have been using a mesh with entrance region to ensure fully developed flow before the heating section, but I am interested in trying a cyclic approach. I have come across som examples for cyclic heat transfer of internal flows (as descirbed in Fully Developed Flow and Heat Transfer in Ducts Having Streamwise-Periodic Variations of Cross-Sectional Area by Patankar & Sparrow, 1977).

The basic idea is to define a modified pressure field,

p^*(x,y,z) = p(x,y,z) - \beta z,
where z is the streamwise direction and \beta z is the pressure drop across the domain. The same can be done for temperature (assuming constant heat flux),
T^*(x,y,z) = T(x,y,z) + \gamma z,

where \gamma is the temperature gradient, defined as
\gamma = \frac{\dot{Q}}{\dot{m}C_p L}.

However, this is not shown for conjugate heat transfer, which I am interested in. I have not managed to find any examples of this yet, so I thought I should ask here if anyone has experience with this. If not, I think it should be possible to implement this in OpenFOAM without too much trouble. Any help is appreciated.

Best regards,
johanesp is offline   Reply With Quote


cht, cyclic, heat transfer, openfoam, periodic

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