Symmetry boundary layer - appropriate wall function

olek.warc · July 24, 2018, 13:57

Hi all,

I am new OpenFoam user and I am trying to simulate external aero of a car in a half-car flow domain. I managed to set up my symmetry wall to "symmetryPlane" in blockMeshDict. I am now wondering what would be appropriate wall function for the symmetryPlane wall in 0.orig/nut file. Does it even need specifying? I am struggling to find any info on this topic.

Let me know if you need any more information to address my question.

Kind regards,
Olek

simrego · July 25, 2018, 07:53

Hi!

There is a boundary condition called "symmetryPlane".
It's not a wall... You need wall functions on walls. Symmetry plane is like a "mirror".
Correct me if I'm wrong!

olek.warc · July 25, 2018, 09:58

Hey,

Perhaps I haven't made myself clear. I have set patch type to "symmetryPlane" in blockMeshDict. However I also need to spec near wall turbulencefunction for said wall in 0.orig/nut. I don't think the option "symmetryPlane" is available for this file?

Thanks for your reply
Olek

simrego · July 25, 2018, 15:34

Yes, I understand you.
You set the patch type to symmetryPlane. But the boundary condition for it is also called symmetryPlane. You can use it on nut too.

July 24, 2018, 13:57	Symmetry boundary layer - appropriate wall function	#1
olek.warc New Member Olek Warchalowski Join Date: Jun 2018 Posts: 5 Rep Power: 7	Hi all, I am new OpenFoam user and I am trying to simulate external aero of a car in a half-car flow domain. I managed to set up my symmetry wall to "symmetryPlane" in blockMeshDict. I am now wondering what would be appropriate wall function for the symmetryPlane wall in 0.orig/nut file. Does it even need specifying? I am struggling to find any info on this topic. Let me know if you need any more information to address my question. Kind regards, Olek

July 25, 2018, 15:34		#4
simrego Senior Member anonymous Join Date: Jan 2016 Posts: 416 Rep Power: 14	Yes, I understand you. You set the patch type to symmetryPlane. But the boundary condition for it is also called symmetryPlane. You can use it on nut too. AlbatrossR likes this.

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July 25, 2018, 07:53		#2
simrego Senior Member anonymous Join Date: Jan 2016 Posts: 416 Rep Power: 14	Hi! There is a boundary condition called "symmetryPlane". It's not a wall... You need wall functions on walls. Symmetry plane is like a "mirror". Correct me if I'm wrong!

July 25, 2018, 09:58		#3
olek.warc New Member Olek Warchalowski Join Date: Jun 2018 Posts: 5 Rep Power: 7	Hey, Perhaps I haven't made myself clear. I have set patch type to "symmetryPlane" in blockMeshDict. However I also need to spec near wall turbulencefunction for said wall in 0.orig/nut. I don't think the option "symmetryPlane" is available for this file? Thanks for your reply Olek