double pipe heat exchanger with helical fin around inner tube
 

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

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

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.

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."

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

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.