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

mozafarie · November 5, 2012, 14:43

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

-mAx- · November 6, 2012, 03:55

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

Marion · November 6, 2012, 06:24

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?
Marion.

mozafarie · November 6, 2012, 14:26

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."

Marion · November 7, 2012, 05:00

If you want to mesh this with hex elements, the best thing to do is to divide the domain into smaller, simpler volumes.
Marion.

Marion · November 7, 2012, 05:02

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.

November 6, 2012, 03:55		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	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 __________________ In memory of my friend Hervé: CFD engineer & freerider

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November 6, 2012, 06:24		#3
Marion Senior Member Marion Join Date: Jul 2012 Location: France Posts: 122 Rep Power: 14	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? Marion.

November 7, 2012, 05:00		#5
Marion Senior Member Marion Join Date: Jul 2012 Location: France Posts: 122 Rep Power: 14	If you want to mesh this with hex elements, the best thing to do is to divide the domain into smaller, simpler volumes. Marion.

November 7, 2012, 05:02		#6
Marion Senior Member Marion Join Date: Jul 2012 Location: France Posts: 122 Rep Power: 14	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.