Grid dependence check

July 28, 2003, 06:10

What difference between results obtained with different meshes is acceptable to say that no additional refinement is needed?

July 28, 2003, 15:02

I would say 5%, but it can depend on a lot of issues!!

Have you got the Ercoftac domumentation yet? It gives guidelines to a lot of these basic questions you're asking

allan

July 28, 2003, 15:23

Hi Allan,

No, don't have the Ercoftac documentation. How can I get it?

Thanks for your response,

Julie

July 28, 2003, 16:35

Have you ever heard of Richardson extrapolation? This gives you as well a mean to check for the mesh independent solution. See also Ferziger & Peric, Computational Methods for Fluid Dynamics, Springer, 2001

July 29, 2003, 05:24

How exactly do I perform the check for independent solution using Richardson extrapolation (for example, applying the material given here: http://www.math.ubc.ca/~burggraf/math256/richardson.pdf)?

July 29, 2003, 06:26

go to their website:

http://www.ercoftac.org

click on the link ercoftac publications then best practice guidelines

allan

July 28, 2003, 06:10	Grid dependence check	#1
Julie Polyakh Guest Posts: n/a	What difference between results obtained with different meshes is acceptable to say that no additional refinement is needed?

July 28, 2003, 15:02	Re: Grid dependence check	#2
allan Guest Posts: n/a	I would say 5%, but it can depend on a lot of issues!! Have you got the Ercoftac domumentation yet? It gives guidelines to a lot of these basic questions you're asking allan

July 28, 2003, 15:23	Re: Grid dependence check	#3
Julie Polyakh Guest Posts: n/a	Hi Allan, No, don't have the Ercoftac documentation. How can I get it? Thanks for your response, Julie

July 28, 2003, 16:35	Re: Grid dependence check	#4
4xF Guest Posts: n/a	Have you ever heard of Richardson extrapolation? This gives you as well a mean to check for the mesh independent solution. See also Ferziger & Peric, Computational Methods for Fluid Dynamics, Springer, 2001

July 29, 2003, 05:24	Re: Grid dependence check	#5
Julie Polyakh Guest Posts: n/a	How exactly do I perform the check for independent solution using Richardson extrapolation (for example, applying the material given here: http://www.math.ubc.ca/~burggraf/math256/richardson.pdf)?

July 29, 2003, 06:26	Re: Grid dependence check	#6
allan Guest Posts: n/a	go to their website: http://www.ercoftac.org click on the link ercoftac publications then best practice guidelines allan

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