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March 9, 2006, 03:16
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About convergence
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Guest
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I tried to run the same case file in single and double precision solver. The convergence limit is 1E-5. The double precision converges while the single one does not. Why this is so?
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March 9, 2006, 12:19
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Re: About convergence
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#2 |
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Numeric diffussion.
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March 9, 2006, 23:59
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Re: About convergence
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#3 |
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Guest
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Then how can I avoid this? Thanks.
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March 10, 2006, 12:36
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Re: About convergence
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#4 |
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Guest
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Using the double precision solver obviously works. If you are using second order upwind try switching to first order, which is less susceptible to numeric diffusion.
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March 10, 2006, 23:19
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Re: About convergence
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#5 |
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Guest
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I'm using QUICK scheme now. I will try 1st order upwind. Thank you!
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