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Old   June 12, 2004, 09:16
Default First order upwind
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Hi all,

I want to know is it true that a second order upwind always provide a better accuracy than a first order one in all flow problem ?

Thank .
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Old   June 12, 2004, 12:57
Default Re: First order upwind
Jonas Larsson
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Yea it should do, at least as long as you get the second order upwind scheme to converge. The first order upwind scheme in fluent is very diffusive and it will quickly smear out all your shear layers etc.
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Old   June 13, 2004, 08:09
Default Re: First order upwind
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A higher order scheme is more accurate than a lower order one.

The problem is in the stability of the solution and the speed of convergence, which usually becomes lower as you increase the order of the scheme.


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