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How to under-relax big source terms in steady-state simulation

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Old   October 15, 2010, 11:04
Smile How to under-relax big source terms in steady-state simulation
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Steven Qhin
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Hi, everyone,

I have a problem here relating to big source terms and highly non-linear uds in FLUENT.

I want to use explicit under-relaxation technique for big source terms,
like this: S(new) = S(old, last iteration)+a*(S(new, this iteration)-S(old))

Now the point is I donot know how to access the values in the last iteration in FLUNET by UDF, so anybody could give me some advice?

Thanks very much!!!
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