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Thermal Sim: Heat Transfer B.C help when modelling convection

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0702518

Mechanical
Sep 24, 2012
6
Hi, wondering if anyone can help me with this - new to using Abaqus for thermal simulation and I am struggling to get the correct model.

What I am trying to achieve is a cavity with walls/surfaces of a certain initial temperature (180 degC) and the cavity filled with hot gas (air for now @ 800 degC).

However when I put in my B.C's for the walls the hot air has no effect and the results just show the model temperature of 180 degC all over.

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any advice is greatly appreciated / also if I am going about this incorrectly please just shout! n.b. I have done the convection by adding Instance -> Surface film condition -> making the sink T = to 800 degC.

Thanks,
scott
 
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