# Time dependent heat flux

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 November 14, 2012, 17:59 Time dependent heat flux #1 Member   Nikunj Raithatha Join Date: Jul 2012 Location: Washington DC Posts: 47 Rep Power: 6 Hello All! I am trying to simulate an example with a trubulentHeatFluxTemperature boundary condition. While I have successfully implemented this BC, I am wanting to introduce time dependent heat flux in table format, where one specifies time and the corresponding heat flux value. I believe it is doable for fields like T, U using uniformFixedValue type, I dont know how to do it while using trubulentHeatFluxTemperature type. Please let me know how to recompile this BC type or related discussions. Thanks. Nikunj.

 January 22, 2013, 06:55 #2 Member   Robert Join Date: Aug 2012 Location: Berlin Posts: 74 Rep Power: 6 Hey Nikunj, have you already found a way to do this? It's exactly the problem I'm facing right now. Best regards, Robert

 April 15, 2015, 04:55 #3 New Member   Jules Join Date: Jun 2014 Posts: 2 Rep Power: 0 Dear all , I 'm also facing this problem. I would like to define two linearly time dependent boundary conditions : a wall heat flux ( W/m^2) and a mixture gas mass flow rate (kg/s). For the heat flux , I was testing the compressible::turbulentHeatFluxTemperature boundary condition on the hot room tutorial case from tutorials/heatTransfer/buoyantPimpleFoam and I modified the Temperature boundary condition for the floor like this : Code: ```floor { type compressible::turbulentHeatFluxTemperature; heatSource flux; // flux for W/m^2 q tableFile; tableFileCoeffs { fileName "/home/user/Openfoam/hotRoom/myDataFile.txt" outOfBounds clamp; } kappa fluidThermo; Qr none; kappaName none; value uniform 300; }``` However this way does not seem to work as q expects the key word uniform with scalar value. May someone provide hints to do some time-dependent heat flux and mass flow rate BC ? Thank you in advance !

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