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Old   July 22, 2002, 08:23
Default Convergence
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hey guys

I am modeling a ventilated space. when I increase the number of cells the mass residual decreases only in an order of one. Is it possible to reduce it further? For a course grid I get a reduction of order 12, when I triple the grid size there is a problem.


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Old   July 23, 2002, 13:25
Default Re: Convergence
James Date
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Just a little tip. Check that the Y+ of any cells near any solid walls is greater than 11, usually cell sizes should be such that the Y+ is in the range of 30 - 500. I have found in my research that failure to stick to the correct bounds for Y+ can result in lack of convergence and very long solution times.

Good luck

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Old   July 29, 2002, 05:32
Default Re: Convergence
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