I am trying to do conjugate heat transfer analysis in Abaqus by using fluid-structure co-simulation between concrete and air. In the standard model, I have defined transient heat transfer step, whereas, flow step in CFD model with temperature energy equation. Equal step time and initial increment have been set for both steps. Same meshing element for both models. The whole model is in mm-tonne-mJ unit system. But somehow, the heat is not transferring despite of more than 500 increments...
Sometimes I get a warning " The assembly is out of date and needs to be regenerated. The input file was not generated and the co-execution was not submitted".
If someone has been through the same problem, please highlight any key points I am missing or add some helpful suggestions/recommendations.
Dear Alina Fatima
Few things to check:
I hope these suggestions are helpful in resolving the heat transfer issue you are facing in your Abaqus simulation.
Hello Alina Fatima,
looking at the illustration provided, the first possible problem that came to mind is that the material properties are not defined correctly. Check carefully the Specific Heat and Conductivity properties you have defined for the material. Chack if they really correspond to mm-tonne-mJ. For example for Specific Heat for concret should be about 880 J/(kg°C) = 880 mJ/(tonn°C), and conductivity is around 1 W/(m°C) = 1 J/(m°Cs) = 1 mJ/(mm°Cs).
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