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[GAMBIT] double pipe heat exchanger with helical fin around inner tube

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Old   November 5, 2012, 15:43
Smile double pipe heat exchanger with helical fin around inner tube
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shahab
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Hello ....
I made a 3d model of double pipe with helical fin around the inner tube in gambit but i can not mesh it.helical fin made it hard to mesh .can any one help me?
here's the picture of 3d model
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Last edited by mozafarie; November 5, 2012 at 16:08. Reason: modify text
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Old   November 6, 2012, 04:55
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did you model the thickness of thin?
Or is it designed as a baffle?
What kind of error did you get?
Can you post picture with shaded mode on
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Old   November 6, 2012, 07:24
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A description of the error would be nice, I agree with mAx. Have you tried to mesh it using the hex/cooper option, or the tet mesh?
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Old   November 6, 2012, 15:26
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Hi.let me explain more about problem.here's a double pipe that the fluid flows through annulus.Therefore i first created annuls then sweeped cross section of fin perpendicular to
helical curve then subtracted annulus volume from fin volume .Now i want to mesh this domain by hex element but gambit does not do any of hex element type (map,submap,tet primitive).
when i chose hex/map after a little meshing this error will be appear
"ERROR: volume could not be meshed without faces successfully meshed."
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File Type: zip 3d inlet tube with fin.zip (26.9 KB, 53 views)
File Type: zip shaded volume.zip (9.7 KB, 43 views)
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Old   November 7, 2012, 06:00
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If you want to mesh this with hex elements, the best thing to do is to divide the domain into smaller, simpler volumes.
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Old   November 7, 2012, 06:02
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I just had a look at the images - I don't think you will be able to use hex at the boundaries of your domain as the angles are very sharp.
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