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Old   April 26, 2007, 17:55
Default grid independence
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how to know grid independence in any problem , is it necessry to find out

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Old   April 27, 2007, 04:50
Default Re: grid independence
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it is not necessary to find out grid independence, but for supplying the time step size or the courant number, and for some turbulence parameters, knowledge of the grid dependence is necessary.
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Old   April 27, 2007, 09:16
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If you want to know how well you are capturing the physics - then grid independence is a definite must. (If you double the mesh count - and your answer changes by more than a few percent - then you know your original mesh was probably not causing any flow characteristics. If the answer changes by more than that - then you know the mesh itself was influencing the flow results.)
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