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boundary condition between multi zones for UDS

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Old   May 10, 2011, 11:12
Default boundary condition between multi zones for UDS
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Dear All

In Fluent, there are three types of boudary conditions between fluid and solid domain. One is flux. Anyone knows what's the meaning of Flux here? Does it equal to -Diffusivity*grad(phai) or -Diffusivity1*grad1(phai)-(-Diffusivity2*grad2(phai)), where the subscript 1 and 2 indicate the two sides of the interface? TKS.
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