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Old   June 3, 2005, 05:27
Default Grid Independance
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lalgudi
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As i am new CFD ACE User, I like to know how to check the grid quality such as grid independance. And what all the basic things and parameter that is to be considered to generate good quality grids can any one help in this.

Thanks in Advance.

lalgudi
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Old   June 7, 2005, 04:38
Default Re: Grid Independance
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lalgudi
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No Reply!!!!!!
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Old   June 7, 2005, 18:47
Default Re: Grid Independance
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Glenn Horrocks
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Hi,

Correct, no reply. Why? Because I think I have answered this question about 50 times before. I wish there was a FAQ we could refer common questions to.

Grid quality parameters can be measured in CFX in ICEM or CFX-Post. They give a number of measures of grid quality.

Grid independance checks are done by generating a number of meshes with different grid resolutions and finding the mesh resolution where the parameters of interest stop changing. The methodology is the same regardless of which CFD code you use.

Regards, Glenn Horrocks
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Old   June 13, 2005, 07:11
Default Re: Grid Independance
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lalgudi
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Thank you Mr.Horrocks,

As i am new user of CFD, i feel i asked an basic question.Thanks for answering. ok! should i change the number of grids in all directions (I,J,K) together or in one direction alone, Sugest me the pattern to change the number of grids which gives good result in less number of grid generation.

Thank you
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Old   June 13, 2005, 14:22
Default Re: Grid Independance
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khalid sultan
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change it in the direction(s) that has or have high gradients. godd luck.
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