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-   -   Boundary condition definitions (http://www.cfd-online.com/Forums/openfoam-solving/59811-boundary-condition-definitions.html)

coastal593 February 22, 2007 17:18

hello all, i'm having some
 
hello all,

i'm having some boundary condition issues and i thought i might bounce what i've got now off some people.

i have 4 types of elements in a fairly asymmetric, complex mesh.

1) walls. nothing in or out.
currently pd is set zeroGraidnet, internalField 101325. U is set fixedValue, uniform (0 0 0), internalField uniform (0 0 0)

2) atmosphere (101.3kPa).
currently pd is set totalPressure, uniform 101325. this isn't good for me because i dont want them to be statically defined. U is set pressureInletOutletVelocity, uniform (0 0 0)

3) low pressure inlet (<101.3kPa), where i set the pressure explicitly in my dictionary pd.
currently pd is set totalPressure, uniform 1333.22 (~10 Torr), U is set pressureInletOutletVelocity, uniform (0 0 0);

4) gas inlet, where i set the velocity explicitly in my dictionary U.
pd is set zeroGradient, U is set fixedValue uniform (80.3007 -114.681 0).

are these appropriate? i'm currently using interFoam and i don't have much confiendence in these settings given the solutions i'm seeing.

any advice would be welcome.

thanks,
anthony


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