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Segregated vs Coupled - help needed

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Old   January 30, 2013, 05:29
Default Segregated vs Coupled - help needed
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Harshad Joshi
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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!!
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Old   January 30, 2013, 12:27
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siamak rahimi ardkapan
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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?
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Old   May 21, 2013, 22:41
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Abdullah Karimi
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Quote:
Originally Posted by jhv_1729 View Post
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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