OverPimpleDyMFoam issue

HARISHKG · August 8, 2018, 10:23

Hi, Am new to openfoam. While i run my simulation using overset method in openfoam(OverpimpleDyMFoam) i get following error:
FOAM Warning :
From function bool Foam:

versetPolyPatch::master() const
in file oversetPolyPatch/oversetPolyPatch.C at line 149
The master overset patch is not the first patch. Generally the first patch should be an overset patch to guarantee consistent operation.
--> FOAM Warning :
From function bool Foam:

versetPolyPatch::master() const
in file oversetPolyPatch/oversetPolyPatch.C at line 149
The master overset patch is not the first patch. Generally the first patch should be an overset patch to guarantee consistent operation.

Please help me sort this issue.

Thanks

omdemircan · August 8, 2018, 10:35

This a warning and not an error. I get get the same warning for my runs, however, it doesn't have a visible effect on the results.

HARISHKG · August 9, 2018, 02:54

hi osman.. For me the visible result has some issues..i am using a three blade system with overlapping zone..overset mesh method is what i am prefering.

HARISHKG · August 9, 2018, 02:56

Simulation image from paraview

omdemircan · August 9, 2018, 13:12

Unfortunately, it is hard to understand what is the issue with your case, with only these images. But it seems to me that your mesh gets much coarser to the edges of your domains surrounding the blades.
Whenever a problem happens with an overset implementation, it is important to check if the overlapping region is compatible with the background mesh as it moves. You should make sure that the background is not very coarse compared to the overlapping region. Ultimately, it could be a problem related to your mesh quality. Other than that, check your boundary conditions and overset region definitions.

HARISHKG · August 10, 2018, 00:23

I use fluentMeshToFoam and meshing is done in ansys workbenck..the mesh used is tetrahedron.

Thanks for the reply ..would try to make the mesh fine and implement it once more

August 8, 2018, 10:23	OverPimpleDyMFoam issue	#1
HARISHKG New Member Harish K G Join Date: Aug 2018 Posts: 7 Rep Power: 7	Hi, Am new to openfoam. While i run my simulation using overset method in openfoam(OverpimpleDyMFoam) i get following error: FOAM Warning : From function bool Foam:versetPolyPatch::master() const in file oversetPolyPatch/oversetPolyPatch.C at line 149 The master overset patch is not the first patch. Generally the first patch should be an overset patch to guarantee consistent operation. --> FOAM Warning : From function bool Foam:versetPolyPatch::master() const in file oversetPolyPatch/oversetPolyPatch.C at line 149 The master overset patch is not the first patch. Generally the first patch should be an overset patch to guarantee consistent operation. --> FOAM Warning : From function bool Foam:versetPolyPatch::master() const in file oversetPolyPatch/oversetPolyPatch.C at line 149 The master overset patch is not the first patch. Generally the first patch should be an overset patch to guarantee consistent operation. Please help me sort this issue. Thanks

August 8, 2018, 10:35		#2
omdemircan New Member Osman Mirza Demircan Join Date: May 2017 Location: Ankara, Türkiye Posts: 29 Rep Power: 8	This a warning and not an error. I get get the same warning for my runs, however, it doesn't have a visible effect on the results. __________________ Osman Mirza Demircan

August 9, 2018, 13:12		#5
omdemircan New Member Osman Mirza Demircan Join Date: May 2017 Location: Ankara, Türkiye Posts: 29 Rep Power: 8	Unfortunately, it is hard to understand what is the issue with your case, with only these images. But it seems to me that your mesh gets much coarser to the edges of your domains surrounding the blades. Whenever a problem happens with an overset implementation, it is important to check if the overlapping region is compatible with the background mesh as it moves. You should make sure that the background is not very coarse compared to the overlapping region. Ultimately, it could be a problem related to your mesh quality. Other than that, check your boundary conditions and overset region definitions. __________________ Osman Mirza Demircan

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August 9, 2018, 02:54		#3
HARISHKG New Member Harish K G Join Date: Aug 2018 Posts: 7 Rep Power: 7	hi osman.. For me the visible result has some issues..i am using a three blade system with overlapping zone..overset mesh method is what i am prefering.

August 10, 2018, 00:23		#6
HARISHKG New Member Harish K G Join Date: Aug 2018 Posts: 7 Rep Power: 7	I use fluentMeshToFoam and meshing is done in ansys workbenck..the mesh used is tetrahedron. Thanks for the reply ..would try to make the mesh fine and implement it once more