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[ÇóÖú] UDF ¶¨ÒåÕ³¶Èºó Error: Divergence detected in AMG solver: x-momentum ÊÇʲôԭÒò ÒÑÓÐ1È˲ÎÓë

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#include "udf.h"
DEFINE_PROPERTY(cell_viscosity,cell,thread)
{
real mu_lam;
real rate=C_STRAIN_RATE_MAG(cell,thread);
mu_lam=339*pow(rate,(-0.75));
return mu_lam;
}
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