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dp/dx and dp/dy in Comsol

Posted Aug 18, 2013, 9:39 p.m. EDT Computational Fluid Dynamics (CFD), Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization, Studies & Solvers Version 4.3 1 Reply

Hooman
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Hello,

I am working with a N.S equation. Does anybody know that p in N.S equation is static pressure or not?
How can I find out that dp/dx=0 or dp/dy=0 in my simulation?

Comsol bring out p as a dependant variable, but why don't we have gradient of p?

we have u,v,spf U. how about pressure??

Thanks
1 Reply Last Post Aug 20, 2013, 7:03 a.m. EDT
Christian Walter
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Posted: 1 decade ago Aug 20, 2013, 7:03 a.m. EDT
I believe that p is the overall pressure (static+dynamic).

I did not find a convenient method to calculate the static pressure yet, but you can plot the gradient of the pressure in the various directions by using "px", "py", and "pz".
I believe that p is the overall pressure (static+dynamic). I did not find a convenient method to calculate the static pressure yet, but you can plot the gradient of the pressure in the various directions by using "px", "py", and "pz".

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