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raffap April 16, 2007 13:34

thermal analysis
 
Is it possible to perform a thermal analysis (only conduction between solid) with pro star??? How can I impose the thermal exchange coefficient (hcoeff) on some surfeces??? I'd like to explain you why I have to do this but it's to long in for a short message... thanks rafpax


SJLee April 17, 2007 01:48

The behavior of droplets at the symmetry boundary
 
Hello, experts!

I'm considering a droplet (axial direction) injection problem in the position of middle of pipe line. By the way, the number of mesh (about 2,000,000 cell) for the problem is too big to dealing. So I'd like to use the the symmetry boundary on the middle of the model. But I'm not familiar with droplet spray problem.

Can I take the symmetry plane boundary on the middle of the model for this droplet injection problem? What happen if droplets are impinged at the symmetry plane boundary?

Thanks in advance.

SJLee

abstrused00388 April 28, 2011 01:12

I have the same doubt as the first person .. please post it as soon as possible !!

will help me complete my project !

hwangkl May 3, 2011 20:12

Quote:

Originally Posted by raffap
;173524
Is it possible to perform a thermal analysis (only conduction between solid) with pro star??? How can I impose the thermal exchange coefficient (hcoeff) on some surfeces??? I'd like to explain you why I have to do this but it's to long in for a short message... thanks rafpax

yes , of couse. only solid thermal analysis is ok in star-cd.

abstrused00388 May 4, 2011 02:01

Quote:

Originally Posted by hwangkl (Post 306161)
yes , of couse. only solid thermal analysis is ok in star-cd.

But tell us how .. ? don't simply post it as "possible" .. even we know it hwangk ! please help !!

TomK May 4, 2011 16:38

SJLee, a way that I have done this same problem is to model 1/4 of the pipe and then set up cyclic boundaries. I was actually able to benchmark against some air/water tests we had done. We had a complex geometry inside the pipe that resulted in a model of 200 million cells for the full problem. So we quartered it, used cyclics on the to edges where it was cut, and it worked fine.

TomK

hwangkl May 4, 2011 21:32

Quote:

Originally Posted by abstrused00388 (Post 306179)
But tell us how .. ? don't simply post it as "possible" .. even we know it hwangk ! please help !!

1.set cell type as solid.
2.switch Solid-Fluid Heat Transfer icon on.
3.re-define material property, that is k, cp, rho,...
4.define boundary.
5.select solver and converge criteria.
6.run

I have test OK, and wish you can success.

Keep smile and don't be angry. :D

abstrused00388 May 23, 2011 02:08

Quote:

Originally Posted by hwangkl (Post 306303)
1.set cell type as solid.
2.switch Solid-Fluid Heat Transfer icon on.
3.re-define material property, that is k, cp, rho,...
4.define boundary.
5.select solver and converge criteria.
6.run

I have test OK, and wish you can success.

Keep smile and don't be angry. :D

Lol .. i was not angry ! i was frustrated !!!
still trying .. nothing worked out :(


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