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Splitting one Geometry in two

Posted May 2, 2013, 10:07 a.m. EDT Heat Transfer & Phase Change, Geometry, Materials Version 4.2a 3 Replies

Kirill Klassen
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Hello,
Iam a newy in working with comsol Multiphysics and would be very glad if I could find some help in this forum for my problem.
I would like to define two different materials in one geometry. You can watch in my attached grafic-file, which geometry Iam talking about. The file shows an tank with luiquid gas inside. But the tank should be filled with liquid gas just for 60 % and the rest should be gas. So there should be something like a border to define the liquid and the gas phase.
I have tried to do it with the workplane, but unfortunetly without succeeding.
Do somebody know how to handle this?
Thank you very much für your help!

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3 Replies Last Post May 6, 2013, 11:48 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 2, 2013, 4:34 p.m. EDT
Hi

indeed with a workplane and a drawing of the closed "solid" contour you should get a cut plane.
Else, the hard way, since your model looks very symmetric, is to add a block cutting away half the model, and then reconstructing it with a rotation of 180 or a mirror node

--
Good luck
Ivar
Hi indeed with a workplane and a drawing of the closed "solid" contour you should get a cut plane. Else, the hard way, since your model looks very symmetric, is to add a block cutting away half the model, and then reconstructing it with a rotation of 180 or a mirror node -- Good luck Ivar
Kirill Klassen
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Posted: 1 decade ago May 6, 2013, 5:11 a.m. EDT
Hello Ivar,

thank you very much for your help!
I tried the first tipp and succeed. But unfortunetly its only working with 50 %. So when the workplane splitts the middle of the tank. If I try to draw the solid contour at a higher plane, like somewhere above the middle axis, the contours come out of the tank because the tank gets smaller but the drawing plane is just for the middle axis.
I don't want to measure the contours. Should't the drawing plane be on the plane where I define it?
I hope you know what I mean and can give me a tipp!
Hello Ivar, thank you very much for your help! I tried the first tipp and succeed. But unfortunetly its only working with 50 %. So when the workplane splitts the middle of the tank. If I try to draw the solid contour at a higher plane, like somewhere above the middle axis, the contours come out of the tank because the tank gets smaller but the drawing plane is just for the middle axis. I don't want to measure the contours. Should't the drawing plane be on the plane where I define it? I hope you know what I mean and can give me a tipp!
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 6, 2013, 11:48 a.m. EDT
Hi
these approaches were tricky before, it has been solved in the new 4.3b, that has added features of projecting cut planes and line conversion (finally :)

--
Good luck
Ivar
Hi these approaches were tricky before, it has been solved in the new 4.3b, that has added features of projecting cut planes and line conversion (finally :) -- Good luck Ivar

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