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Forum: STAR-CCM+

June 6, 2012, 21:26

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Below picture shows 30k iterations. I did...

Below picture shows 30k iterations.

I did not change relaxation factor

Thanks

Forum: STAR-CCM+

June 3, 2012, 22:05

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

ok I'll let it run.... I'm using segregated...

ok I'll let it run....

I'm using segregated flow.

Thank you

Forum: STAR-CCM+

June 1, 2012, 12:33

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

After 5000 iterations it still looks unsteady..! ...

After 5000 iterations it still looks unsteady..!

Thanks

Forum: STAR-CCM+

May 31, 2012, 14:51

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

1000 iterations Thank you

1000 iterations

Thank you

Forum: STAR-CCM+

May 31, 2012, 10:48

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

ok...this is what the simulation looks like now ...

ok...this is what the simulation looks like now
Any ideas about the strange behavior happening in the middle of the tube

Forum: STAR-CCM+

May 29, 2012, 13:31

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

I don't see a re-initialize on the right click...

I don't see a re-initialize on the right click menu...!
Below is the output when I click Reset-All & Initialize

Forum: STAR-CCM+

May 29, 2012, 11:57

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

abdul099, What did you mean by "Check the...

abdul099,
What did you mean by "Check the output for the interface matching"?

Thanks

Forum: STAR-CCM+

May 24, 2012, 19:34

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Yeah

Ok now I can see the steel and water, Great..
below is all the 3 physics models I'm using now...

But I still don't see any change in temperature in steel or water!
Air inlet, velocity=1m/s &...

Forum: STAR-CCM+

May 21, 2012, 13:42

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

I changed all physics continua to Segregated...

I changed all physics continua to Segregated solver. But Star CCM still gives me an incompatible error ?

I have attached the three continua & the error massage..

Thank you

Forum: STAR-CCM+

May 17, 2012, 14:15

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

I let it run 1000 iterations. Outlet conditions...

I let it run 1000 iterations. Outlet conditions are good.

I'm experiencing another problem. See the below error massage.,
This happens when I apply Coupled Energy to Steel tube.Do I need to add...

Forum: STAR-CCM+

May 9, 2012, 15:48

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

It worked. I can see temperatures in all regions...

It worked. I can see temperatures in all regions now.
I have another problem. When I draw streamlines, water doesn't seem to go through the tube (Direction of the blue arrow). Any ides??

Thank you

Forum: STAR-CCM+

May 7, 2012, 18:46

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Thank you so much for your reply and your...

Thank you so much for your reply and your precious time spending on me.
I'm still learning Star CCM+. Your reply is so informative & better than any of the heat exchange tutorials comes with Star...

Forum: STAR-CCM+

May 1, 2012, 14:12

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

This is the sim file , ...

This is the sim file ,

https://docs.google.com/open?id=0B43E5MMdSoPvVl93M1RXMHdpMUE

Thank you for your valuable time

Forum: STAR-CCM+

April 26, 2012, 16:51

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Hi, Thanks...Fixed it Simulation ran without...

Hi,
Thanks...Fixed it
Simulation ran without an error. :)
But output is not quiet what I expected. There is no temperature gradient in he water column!
And why can I see whats happening inside...

Forum: STAR-CCM+

April 26, 2012, 13:35

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Hi, I'm a engineering student just binning...

Hi,

I'm a engineering student just binning to learn CFD with Star CCM+.
I want to know if I created regions/interfaces correctly.

Thank you

Forum: STAR-CCM+

April 26, 2012, 12:03

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Hi LuckyTran, This is a part of a big...

Hi LuckyTran,

This is a part of a big simulation. I think if I understand how to set up this problem in Star CCM+ it will resolve lot of thing in the full version.

Full version includes a...

Forum: STAR-CCM+

April 26, 2012, 10:28

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Hi LuckyTran, Thank you for your reply. ...

Hi LuckyTran,

Thank you for your reply.
The outlet mustn't contain any steam. So the maximum water temperature shouldn't exceed 100C. IMO 90C would be a good value for the outlet water...

Forum: STAR-CCM+

April 25, 2012, 16:25

Replies: 40

Cross Flow Heat Exchager

Views: 9,681

Posted By iDeew

Cross Flow Heat Exchager

I'm new to Star CCM+ and want to simulate a cross flow heat exchanger.
Please look at the attached picture.
The steel tube carrying a turbulent flow of water and hot air flows upwards across this...

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