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Forum: OpenFOAM

June 13, 2010, 23:47

Replies: 25

Temperature inlet/outlet boundary conditions

Views: 23,206

Posted By poplar

kriz. For buoyancy case, use...

kriz.

For buoyancy case, use buoyantPressure at all walls .At inlet, buoyantPressure seems better than zeroGradient. At outlet, zeroGradient fot velocity and specific value for pressure.

If...

Forum: OpenFOAM

June 11, 2010, 22:49

Replies: 25

Temperature inlet/outlet boundary conditions

Views: 23,206

Posted By poplar

Your right Boundary was set as a fixed pressure...

Your right Boundary was set as a fixed pressure =0?
Appropriate setting is: pd=0,or p=p_top-g*h
pd=0 is a easy way

Forum: OpenFOAM

June 11, 2010, 21:59

Replies: 25

Temperature inlet/outlet boundary conditions

Views: 23,206

Posted By poplar

Hi,jeff. "value uniform -1.138941;...

Hi,jeff.

"value uniform -1.138941; //-rho*g*h"
"rho 1.161;"

Perhaps these should be :
"value uniform -1.138941/1.161; //-rho*g*h"
"rho 1.161/1.161;"

in BuoyantBoussnesq*, the pressures...

Forum: OpenFOAM

June 11, 2010, 03:20

Replies: 25

Temperature inlet/outlet boundary conditions

Views: 23,206

Posted By poplar

Density is not required for...

Density is not required for buoyantBoussinesqPiso/SimpleFoam solver.

Governing eqns.:
continuity, div(u)=0
momentum Du/Dt=-Grad(p)/rho+Div(nyu_eff*Grad(u))+beta*g*(T-T0)

let P=p/rho,...

Forum: OpenFOAM

June 11, 2010, 02:06

Replies: 25

Temperature inlet/outlet boundary conditions

Views: 23,206

Posted By poplar

Hi,jeff. based on your B.C.: ...

Hi,jeff.

based on your B.C.:
rightsideatmosphere
{
type inletOutlet;
inletValue uniform (0 0 0);
value uniform (0 0 0);
}

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