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In which operation should I apply the Bounce back conditions ?

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Old   August 12, 2012, 13:04
Question In which operation should I apply the Bounce back conditions ?
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Dear all,

I'm simulating the heat transfer in a cavity which contains two heated obstacles,
My problem is where should I add the (Thermal) bounce back condition(solid-fluid) in the stream operation or in the collision one,
More, the LBM Algorithm in oure code is in this order :

3-Boundary conditions
4-Macroscopic proporties

Would you mind helping me or advising me please?

Best regards,
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