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How to solve UDS in Multiphase flow

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Old   March 6, 2007, 04:33
Default How to solve UDS in Multiphase flow
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I want to solve a scalar equation for solid phase in gas-solid flow. I try to solve it use UDS. My question is when i choose "mass flow rate" for flux function in UDS panel, the solution is ok. When I use my UDF to define the flux, it diverges. The udf is simple return the value of F_FLUX. Can anyone help me? Really appreciate if you help me out.

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