Can OpenFoam handle both positive and negative velocites at the inlet?

sjohn2 · September 24, 2020, 15:56

Hi,

I am trying to implement a sinusoidal velocity at the inlet , where flow both goes in and (suction/negative) comes out of the boundary. Can OpenFoam handle such a thing?

Has anyone implemented such a case or negative velcoity at the inlet?

I have submitted a bug to the foundation:

https://bugs.openfoam.org/view.php?id=3551

I know CFX cannot handle such a boundary, but what about OpenFoam ?

pvpnrao · July 2, 2021, 16:36

Did you happen to find any information on this. I am also trying to simulate this
positive velocity followed by negative. Similar to breathing cycle.

HPE · July 2, 2021, 19:00

could any of these help?:
- https://www.openfoam.com/documentati...e.html#details
- https://www.openfoam.com/news/main-n...patchfunction1
- https://www.openfoam.com/news/main-n...patchfunction1

September 24, 2020, 15:56	Can OpenFoam handle both positive and negative velocites at the inlet?	#1
sjohn2 Member Stanley John Join Date: Sep 2018 Posts: 79 Rep Power: 8	Hi, I am trying to implement a sinusoidal velocity at the inlet , where flow both goes in and (suction/negative) comes out of the boundary. Can OpenFoam handle such a thing? Has anyone implemented such a case or negative velcoity at the inlet? I have submitted a bug to the foundation: https://bugs.openfoam.org/view.php?id=3551 I know CFX cannot handle such a boundary, but what about OpenFoam ?

July 2, 2021, 19:00		#3
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 931 Rep Power: 13	could any of these help?: - https://www.openfoam.com/documentati...e.html#details - https://www.openfoam.com/news/main-n...patchfunction1 - https://www.openfoam.com/news/main-n...patchfunction1 __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

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July 2, 2021, 16:36		#2
pvpnrao Member Pavan Join Date: Jan 2016 Posts: 53 Rep Power: 10	Did you happen to find any information on this. I am also trying to simulate this positive velocity followed by negative. Similar to breathing cycle.