|March 9, 2012, 15:18||
Fixed Flow rate and outlet Continuity Problem
Join Date: Jul 2010
Posts: 49Rep Power: 8
I'm modeling a centrifugal fan in a fix flow rate with OF, but I had a problem and haven't find any solution for it!!!!
As I know in fluent it is modeled by these BCs:
in OF I've tested many things like:
inlet: U: fixedFlowRate
outlet: U: zeroGradient/fluxCorrectedVelocity
and a pRefCell and pRefValue for pressure reference. I think these Bcs are equivalent as the Fluent Bcs. When I run the MRFSimpleFoam the error would be
Continuity error cannot be removed by adjusting the outflow.
Please check the velocity boundary conditions and/or run potentialFoam to initialise the outflow.
Total flux : 56.788705
Specified mass inflow : 0.55
Specified mass outflow : 0
Adjustable mass outflow : 0
What is the problem? Thanks for your help.!!!
|March 10, 2012, 15:32||
Join Date: Jun 2011
Posts: 141Rep Power: 9
when you use a fixedflowrate type for bcs.. you cannot constraint the outlet else you'll get this error...enforcing zerograd on U does it..try using inletout types with massflow types.. cuz then u can have backflow
or convert your massflow to velocity and use, if possible :
"Elune will grant us the strength"
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