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February 27, 2023, 04:41 |
Periodic boundary condition setting
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#1 |
New Member
Shuo_Yuan
Join Date: Aug 2022
Posts: 9
Rep Power: 3 |
Dear all,
I wanna simulate a flow circulation, so I set the Inlet (velocity inlet boundary) and Outlet (pressure outlet boundary) as a pair of periodic boundaries. But as this simulation running, the flow velocity keep decreasing. I wanna make the velocity keep the value I set. Is there anything I missed? Any information will be appreaciated. Thanks. |
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February 28, 2023, 06:47 |
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#2 |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
Posts: 435
Rep Power: 17 |
Fully-Developed Interface. Mass Flow Rate there.
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March 30, 2023, 09:39 |
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#3 |
New Member
Shuo_Yuan
Join Date: Aug 2022
Posts: 9
Rep Power: 3 |
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May 9, 2023, 17:05 |
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#4 |
Member
WY
Join Date: Mar 2020
Posts: 36
Rep Power: 6 |
Hi, I set a velocity inlet (with a constant velocity) and a pressure outlet (with zero pressure), and create periodic fully-developed interfaces on inlet-outlet and give a constant mass flow rate. To my understanding, this prescribed mass flow rate would be maintained during the calculation. But will the type and value of inlet and outlet would have any effect on the simulation? It seems that all the setting of periodic boundary would overwrite the previous settings. Thanks!
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May 10, 2023, 00:57 |
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#5 |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
Posts: 435
Rep Power: 17 |
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May 10, 2023, 01:46 |
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#6 |
Member
WY
Join Date: Mar 2020
Posts: 36
Rep Power: 6 |
Thanks for replying! A follow-up question is for periodic inlet and outlet boundaries, if the periodic interface will overwrite other settings, how to appropriately apply and reflect inflow condition, such as a parabolic velocity profile, in the simulation? Thanks!
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May 10, 2023, 02:37 |
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#7 |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
Posts: 435
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Velocity profile would be a result of the simulation.
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