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Old   March 21, 2002, 17:55
Default Continuity residual
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Ferraris
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hi every one :

I have a little problem with the conticuity residual. I m modelling a 3d natural convection problem and it seems not easy reduce this residual in particular. I am using linear aproximation of the density like force source in the momentum equation, and i m not sure what this continuity residual means.

I could not find this explanation in the manuals .

Thank you in advance.

Sergio
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Old   March 22, 2002, 03:03
Default Re: Continuity residual
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Jin-Wook LEE
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You can be advised by the Fluent's 'HELP' option.

Help --> Index --> Definition of residuals.

Sincerely, Jinwook

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Old   March 22, 2002, 07:21
Default Re: Continuity residual
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Greg Perkins
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I've found that often problems with continuity stem from a poor mesh. Making a better mesh often helps the continuity equation residuals.

(though I've done very little natural convection..)

An easy way to check is to use grid adaption on your existing grid in regions where residuals are high. If this works, you can then go back and create a better starting grid. I also suggest using hexas or quads if possible in preference to tets and tris.

Greg
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