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-   -   [GAMBIT] double pipe heat exchanger with helical fin around inner tube (http://www.cfd-online.com/Forums/ansys-meshing/108945-double-pipe-heat-exchanger-helical-fin-around-inner-tube.html)

mozafarie November 5, 2012 15:43

double pipe heat exchanger with helical fin around inner tube
 
1 Attachment(s)
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 04:55

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 07:24

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 15:26

2 Attachment(s)
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 06:00

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 06:02

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.


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