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November 27, 2024 at 10:09 am
Dio
SubscriberHi,
I am doing simple smooth pipe to get Nusselt number.
Defined periodic BC at fluent meshing side, and added 1e-3 uniform inflation.
When I switch to fluent, defined periodic bc and it worked. result was higher than dittus-boelter corelation
Then wantted to decrease inflation first layer to 3.1e-6 using y+ calculator.
But that time in fluent side periodic bc does not work and got below error.
What can be the reason?
Thank you,
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November 27, 2024 at 10:58 am
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November 27, 2024 at 11:09 am
Rob
Forum ModeratorThat looks OK. You can always create a nonconformal periodic, that generally avoids problems.
I assume you checked the periodic energy equation fudge and how Fluent calculates Nu?
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November 27, 2024 at 11:53 am
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November 27, 2024 at 12:35 pm
Rob
Forum ModeratorDefine as "interface" & "interface_1" or "fred" & "ginger" but with the type as interface.
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November 27, 2024 at 1:16 pm
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November 27, 2024 at 1:49 pm
Rob
Forum ModeratorNice to see the classic boundary name pairing. :)
It's running so the basics are OK. If you review the flowfield at around 20 iterations what is going on?
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November 27, 2024 at 2:14 pm
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November 27, 2024 at 2:21 pm
Rob
Forum ModeratorCheck things like area values in Fluent alongside what the experimental values & errors are. I won't say the experiment is wrong, nor the CFD, but don't assume either is "correct" either.
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