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how to apply velocity to the interface of fluid and air

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Old   March 15, 2016, 02:25
Default how to apply velocity to the interface of fluid and air
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hanglianqiang
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hello, everyone, I am a newer here.
now I encounter a problem in my OF learning, it is very urgent.
the model is: the fluid phase is a block surround by air phase, and apply a force or a velocity on one face of the fluid block, aiming to stretch the fluid block.
I know that the setfield can define the interfield of the whole mesh, but I did not find the function of applying boundary condition on the interface.
Could you help me, thanks.
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