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-   -   Segregated vs Coupled - help needed (http://www.cfd-online.com/Forums/star-ccm/112502-segregated-vs-coupled-help-needed.html)

jhv_1729 January 30, 2013 05:29

Segregated vs Coupled - help needed
 
Hi,

What model would any one of you suggest for flows involving low velocities ( upto 40 m/s) but very high temperatures (500 C) - segregated or coupled? I am trying to an external simulation where there are hot air exhausts in moderate wind conditions.

Thanks!!

siara817 January 30, 2013 12:27

Hi
It depends on the CPU capacity that you have. Coupled flow usually gives more accurate solution but it will take longer time to converge.
Is it possible to do some measurements to prove your simulation? if yes, then you can try first segregated and if it did not give reasonable result then change it to coupled.
What is the fluide, Is it air?

abdullahkarimi May 21, 2013 22:41

Quote:

Originally Posted by jhv_1729 (Post 404962)
Hi,

What model would any one of you suggest for flows involving low velocities ( upto 40 m/s) but very high temperatures (500 C) - segregated or coupled? I am trying to an external simulation where there are hot air exhausts in moderate wind conditions.

Thanks!!

For low velocities, I would prefer segregated solver anyday. This has been found to give faster results. Coupled solver would not even converge (my experience) many times when you have low velocity cases. And user guide also recommends segregated solver for the low velocities.


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