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April 15, 2010, 09:42 |
Phase segregation in multiphaseInterFoam
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#1 |
New Member
Søren
Join Date: Apr 2010
Posts: 3
Rep Power: 16 |
Hey guys,
I have a problem. I'm currently simulating a 3 phase injectionmolding process in OpenFoam using multiphaseInterFoam, and the phases keep segregating. I have tried adjusting the sigmas in the transportProperties and the alphaContactAngle in my alphaair. How do i adjust the phases compatibility so they don't segregate so violently? t=0 t=0.001 |
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April 15, 2010, 10:38 |
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#2 |
Senior Member
Claus Meister
Join Date: Aug 2009
Location: Wiesbaden, Germany
Posts: 241
Rep Power: 18 |
Have yet tried to simulate without any contact angles, i.e. zeroGradient at all walls?
Furthermore, could you post transportProperties, U and p. I would like to take a closer look |
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April 16, 2010, 07:52 |
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#3 |
New Member
Søren
Join Date: Apr 2010
Posts: 3
Rep Power: 16 |
Thanks for your reply!
I just tried that and it still goes zebra on me... Here is the code. Some is from the damBreak4phase case. I also have at problem with floating point exception when I increase the viscosity of the binder or the powder. Code:
FoamFile { version 2.0; format ascii; class volScalarField; object p; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [1 -1 -2 0 0 0 0]; internalField uniform 0; boundaryField { inlet { type zeroGradient; } left { type fixedValue; value uniform 0; } right { type fixedValue; value uniform 0; } defaultFaces { type zeroGradient; } } Code:
FoamFile { version 2.0; format ascii; class volVectorField; object U; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { inlet { type fixedValue; value uniform (0 -2 0); } left { type zeroGradient; } right { type zeroGradient; } defaultFaces { type fixedValue; value uniform (0 0 0); } } Code:
FoamFile { version 2.0; format ascii; class dictionary; location "constant"; object transportProperties; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // phases ( powder { transportModel Newtonian ; nu nu [ 0 2 -1 0 0 0 0 ] 1e-03 ; rho rho [ 1 -3 0 0 0 0 0 ] 7800 ; } binder { transportModel Newtonian ; nu nu [ 0 2 -1 0 0 0 0 ] 0.1 ; rho rho [ 1 -3 0 0 0 0 0 ] 1000 ; } air { transportModel Newtonian ; nu nu [ 0 2 -1 0 0 0 0 ] 1.48e-03 ; rho rho [ 1 -3 0 0 0 0 0 ] 1 ; } ); refPhase air; sigmas ( ( air binder ) 0 ( air powder ) 0 ( binder powder ) 0 ); |
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May 7, 2010, 05:10 |
Immiscible phases...
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#4 |
New Member
Søren
Join Date: Apr 2010
Posts: 3
Rep Power: 16 |
Apparently I have missed that multiphaseInterFoams phases are immiscible. So this solver can't be used to simulate segregation in metal injection moulding.
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