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Boundary condition in a multiphase flow

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Old   April 2, 2013, 04:46
Default Boundary condition in a multiphase flow
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Hi to all,
I have a problem in the setting of the boundary condition of a multiphase flow using interfoam.
My case is summarized as follow:
at the initial time t=0 the right wall of a closed tube completely filled with a liquid is removed, allowing the liquid to exit the domain and, at the same time, allowing the gas to enter.
I set this boundary condition:
U) fixedValue (0,0,0) in the pipe wall and in the left inlet, zeroGradient in the outlet
p) zeroGradient in the pipe wall and in the left inlet, fixedValue of 1 atm in the outlet
alpha) zeroGradient in the pipe wall. For the left inlet and the outlet I tried some case:
- InletOutlet/InletOutlet
- zeroGradient/zeroGradient
- zeroGradient/InletOutlet
- zeroGradient/calculated
but all this case give me strange solution

Someone have an idea to set the boundary condition for this case?
thank to all
giack is offline   Reply With Quote


alpha1, boundary condition, interfoam, multi phase

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