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Vacuum Initial condiction
hello, every one
i have a problem does the Initial condiction can set Vacuum ? thanks |
voids can be assigned pressure and temperature, but without the use of a bubble model it does not make much difference for one-fluid incompressible flow. What is the application you are using it for?
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so the voids is air? I don't know the void means,and how to use it. i wanna use vapor started into a tube to condensation and I think the tube should not have any fluids at first. so i wanna set the tube as vacuum condiction at first. thank you very much! you really help me many times! |
If you want to inject vapor into a vacuum, then a void model will not work. You will need to use the two-fluid model, with fluid #1 representing liquid phase and fluid #2 representing the vapor. The initial vacuum will have to approximated by the vapor at a low density.
You can then inject vapor (fluid #2) at a mesh boundary by specifying the velocity, density and temperature at it. As it condenses it will form fluid #1, liquid that is.. |
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The initial vacuum will have to approximated by the vapor at a low density. I don't know that means??... |
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