# How to define momentum source?

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 May 5, 2002, 12:45 How to define momentum source? #1 Bogesz Guest   Posts: n/a In CFX build 5.5 I want to define linear resistance coefficient. In which direction (u, v, or w) of the velocity will it take effect? Because the Help says the linear (or quadratic) resistence coefficients are related to the x, y or z components but in the source definition window of Build I can define by components only the momentum source, for the coefficients there's no option to define which velocity component I want to handle THX Bogdan

 May 6, 2002, 14:44 Re: How to define momentum source? #2 Neale Guest   Posts: n/a It's isotropic resistance in all three directions. You can't currently specifically do x, y or z independently. Neale

 May 10, 2002, 05:31 Re: How to define momentum source? #3 alain Guest   Posts: n/a If you want to define an anisotropic resistance coefficient, you can use the momentum source term with an adequate CEL expression for linear or quadratic source term. Alain

 July 23, 2002, 03:25 Re: How to define momentum source? #4 kim nag jeom Guest   Posts: n/a

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