NO Moving Probes for Moving Mesh in Foam Extend 4.0

alia · April 6, 2017, 14:08

Dear Foamers,

In OpenFOAM we are able to define probes that are moving with a moving mesh which is very useful for example in pressure probing of moving objects. this capability unfortunately I think is not available in Foam-Extend versions, which is a very big flaw especially for FSI applications.

the following lines which are in probes.H files of OpenFOAM are missing in Foam Extend versions:

Code:

//- Fixed locations, default = yes
//  Note: set to false for moving mesh calculations where locations
//        should move with the mesh
    
//- Interpolation scheme name
//  Note: only possible when fixedLocations_ is true
word interpolationScheme_;       bool fixedLocations_;

anyone knows how to resolve this issue? or can we fix it in probes.H and probes.C files?

Thank you

Ali

alia · September 19, 2017, 05:59

I did solve this problem a while ago and I want to share it here.
it is quite simple to have probes moving with mesh. you just need to comment out the following lines from the probes.C file

Code:

    if (mesh.moving() || mesh.changing())
    {
        cellList_.clear();
        findCells(mesh);
    }

cheers

Bazinga · June 7, 2018, 06:15

Is there anything else I need to do? I commented out the part of the code but the probes are still not moving with the mesh although I added "fixedLocations false" in the controlDict.

alia · June 7, 2018, 06:36

Quote:

Originally Posted by Bazinga

Is there anything else I need to do? I commented out the part of the code but the probes are still not moving with the mesh although I added "fixedLocations false" in the controlDict.

Dear Bazinga, you need to copy the probes directory in your FOAM_USER directory and rename the class to create a new class like myProbe. after compiling it should work. make sure you type the name of the new probe in the probe definition in controlDict.
I just put my adjusted probe code here. I hope it helps.
Cheers
Ali

Bazinga · June 7, 2018, 07:10

Thanks for the fast reply. I will try it, but I am not too familiar with this. If possible, to make things a bit easier, can you share your code?
edit: Thank you so much

alia · June 7, 2018, 07:23

I just edited my last reply and attached the code
Cheers

gigliagarf · June 25, 2018, 10:24

I also am having trouble with this exact issue, I tried your approach with commenting out the section and duplicating the probes folder to make myprobes, however it didn't compile correctly. I also tried just downloading your folder to my $WM_PROJECT_USER_DIR and typing wmake within it, without success. Do you have any suggestions as to what I might be doing wrong? I have fsi foam and waves2foam installed as well, do you think they have broken the functionality or your fix?

April 6, 2017, 14:08	NO Moving Probes for Moving Mesh in Foam Extend 4.0	#1
alia New Member Ali Aghaei Join Date: Oct 2014 Posts: 12 Rep Power: 12	Dear Foamers, In OpenFOAM we are able to define probes that are moving with a moving mesh which is very useful for example in pressure probing of moving objects. this capability unfortunately I think is not available in Foam-Extend versions, which is a very big flaw especially for FSI applications. the following lines which are in probes.H files of OpenFOAM are missing in Foam Extend versions: Code: //- Fixed locations, default = yes // Note: set to false for moving mesh calculations where locations // should move with the mesh //- Interpolation scheme name // Note: only possible when fixedLocations_ is true word interpolationScheme_; bool fixedLocations_; anyone knows how to resolve this issue? or can we fix it in probes.H and probes.C files? Thank you Ali Bazinga likes this.

September 19, 2017, 05:59	Solved	#2
alia New Member Ali Aghaei Join Date: Oct 2014 Posts: 12 Rep Power: 12	I did solve this problem a while ago and I want to share it here. it is quite simple to have probes moving with mesh. you just need to comment out the following lines from the probes.C file Code: if (mesh.moving() \|\| mesh.changing()) { cellList_.clear(); findCells(mesh); } cheers pi06jl6, Bazinga and fcl like this.

June 7, 2018, 07:10		#5
Bazinga Senior Member Join Date: Jun 2012 Location: Germany, Bochum Posts: 230 Rep Power: 16	Thanks for the fast reply. I will try it, but I am not too familiar with this. If possible, to make things a bit easier, can you share your code? edit: Thank you so much Last edited by Bazinga; June 7, 2018 at 07:13. Reason: because alia is awesome

June 7, 2018, 07:23		#6
alia New Member Ali Aghaei Join Date: Oct 2014 Posts: 12 Rep Power: 12	I just edited my last reply and attached the code Cheers Bazinga likes this.

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June 7, 2018, 06:15		#3
Bazinga Senior Member Join Date: Jun 2012 Location: Germany, Bochum Posts: 230 Rep Power: 16	Is there anything else I need to do? I commented out the part of the code but the probes are still not moving with the mesh although I added "fixedLocations false" in the controlDict.

June 25, 2018, 10:24		#7
gigliagarf New Member Join Date: Oct 2014 Location: Lafayette, LA Posts: 18 Rep Power: 12	I also am having trouble with this exact issue, I tried your approach with commenting out the section and duplicating the probes folder to make myprobes, however it didn't compile correctly. I also tried just downloading your folder to my $WM_PROJECT_USER_DIR and typing wmake within it, without success. Do you have any suggestions as to what I might be doing wrong? I have fsi foam and waves2foam installed as well, do you think they have broken the functionality or your fix?