# Wall heat transfer

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 July 9, 2014, 13:46 Wall heat transfer #1 New Member   Join Date: Jul 2014 Posts: 21 Rep Power: 5 Sponsored Links 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

 July 10, 2014, 08:44 #2 New Member   ashwin Join Date: Jul 2012 Location: erlangen Posts: 26 Rep Power: 7 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

 July 11, 2014, 11:09 Wall heat transfer #3 New Member   Join Date: Jul 2014 Posts: 21 Rep Power: 5 Thanks for the response. I am now testing this BC with rhoSimpleFoam.

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