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Assign different heat transfer coefficient

Hello everyone

As there is convection, I use MAT4, which also contains the heat transfer coefficient H. Now I am woundering, how can you specify two different heat transfer coefficient on certain surfaces of the model?

The heat transfer coefficient is actuallly not a material property, so I am woundering if this is the right way to go. How can two different heat transfer coefficient be assigned?

Thank you in advance for your help!

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Rahul Rajan_21763

The Heat transfer coefficient can be defined in PCONV (Free Convection Property Definition).

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Altair Forum User

Thank you Rahul!

Does this interface come from the group 'CONVECTION'? Because the default there is FTYPE 0, with which I can assign MID, but no H1. If I change FTYPE to 3 I can assign a H1, but no MID.

Do you know why I can't assign both?

Altair Forum User

Okay I can assign MID and H1. But there is still a problem. The temperatures are not including any convection.

Can I still use MAT4 and specify there the thermal conductivity (K) and leave the heat transfer coefficient (H) empty?

Rahul Rajan_21763

yes you can try with above settings. If still face issue then please share fem file to check same at our end.