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how to specify axis in hollow geometry

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Old   August 29, 2002, 13:01
Default how to specify axis in hollow geometry
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vinayak
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sir how to specify axis for hollow geometry thanking in anticipation
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Old   August 29, 2002, 22:23
Default Re: how to specify axis in hollow geometry
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david
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For example you have a hollow cylider of radius r1 and r2.

If you define your central exis in the central axis of cylinders, still its alright as the domain will be considered as r2-r1 with the length L.

DC
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Old   August 30, 2002, 02:44
Default Re: how to specify axis in hollow geometry
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vinayak
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but as this hollo portion is neither fluid nor solid so when we exort to fluent it wont take axis specification
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Old   August 30, 2002, 21:54
Default Re: how to specify axis in hollow geometry
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david
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Hey Vinayak Ofcourse you know how do subtract volumes in gambit don't you ?

Well, in case you don't: create 2 volumes of radius r1 and r2 and subtract r1 from r2 if r2>r1. Keep the subtracted volume and delete everything else.

DC
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Old   September 1, 2002, 10:46
Default Re: how to specify axis in hollow geometry
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sri
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the other option would be to make the unwanted fluid zone into solid zone so that flow equations are not solved in this region.If you are also solving for energy equation,give a very low thermal conductivity to the solid region.

sri
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