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-   -   accuracy (http://www.cfd-online.com/Forums/fluent/46157-accuracy.html)

jai September 27, 2007 12:41

accuracy
 
i'm going to analyse one heat transfer problem in heat exchanger by using fluent with more accuracy mode. so for what are all enable while iterating?

Glenn September 28, 2007 07:04

Re: accuracy
 
For heat transfer, I suggest you always 1) use the double precision solver, and 2) make sure the energy under-relaxation factor is set to exactly 1.0 (especially if analyzing a conjugate heat transfer problem). In prior years, I have seen an invalid conjugate result with energy under-relaxation as high as 0.98, which quickly altered and corrected itself when energy under relaxation was changed from 0.98 to 1.0. Hope this helps.


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