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Old   July 9, 2014, 13:46
Default Wall heat transfer
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Hi,
I would like to solve heat transfer from an air flow through a metal wall to surrounding air without modelling the solid wall thickenss (separate mesh).



The BC would be set as:

Internal wall temperature is calculated
Internal heat transfer coefficient is calculated
Wall thickens and conductivity are assigned
External surrounding temperature is assigned


Is it possible to use for this problem BC externalWallHeatFlux or is there some other BC for this propose? Is there some tutorial solving this problem?


Thanks
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Old   July 10, 2014, 08:44
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ashwin
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Hello Altan,

The externalWallHeatFlux fits perfectly to your description.

Code:
wall
        {
            type            externalWallHeatFluxTemperature;
            kappa           fluidThermo;       // fluidThermo, solidThermo 
            //q               uniform 1000;      // heat flux / [W/m2]
            Ta              uniform 300.0;     // ambient temperature /[K]
            h               uniform 10.0;      // heat transfer coeff /[W/K/m2]
            thicknessLayers  (0.1); // thickness of layer [m]
            kappaLayers     (0.05);          // thermal conductivity of
                                               // layer [W/m/K]
            value           uniform 300.0;     // initial temperature / [K]
            kappaName       none;
        }
Note
Only supply \c h and \c Ta, or \c q in the dictionary
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Old   July 11, 2014, 11:09
Default Wall heat transfer
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Thanks for the response. I am now testing this BC with rhoSimpleFoam.
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