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convective heat flux boundary condition

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Hi,

I'm confused by the result I got by using convective heat flux boundary condition. Hope I can find the answer here. Thanks a lot.

I'm working on a time dependent heat transfer model, one of the boundaries is defined as convective heat flux, q0=h(Text-T). Based on the definition of heat flux, q0=-k(dT/dx), I checked my result after running a few time steps. I plotted ht.q0 line graph along the boundary, as well as -material.k_isoTx along the boundary, they are not the same.

I also plot integration(q0) and integration(-k*Tx) along the boundary with respect to time, they are getting closer as time, but I'm still confused about this, is it because my mesh is not good enough? I'm checking all these because I didn't get a good result for my model and trying to find out the reason.

Really appreciate your help. Thanks a lot.

Jing


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