directMappedPatch in OpenFoam 1.6

olhe0002 · April 1, 2010, 06:28

Hi!

I'm trying to use directMappedPatch in order to sample the fluid-velocity
at point x/y/z to a boundary (by using an offset).

I get the message:

FOAM Warning :
From function directMappedPatchBase::calcMapping() const
in file directMapped/directMappedPolyPatch/directMappedPatchBase.C at line 451
The actual cell/face centres picked up using offset (0 0.33 0) are not
on a single plane. This might give numerical problems.
At patchface (-70.1184 25.6462 2.17446) the sampled cell/face (-70.12 26.0355 2.17448)
is not on a plane 0.390814 offset from the patch.
You might want to shift your plane offset. Set the debug flag to get a dump of sampled cells.

Does somebody know this message?

Best Regards

olhe

om3ro · April 8, 2010, 10:54

I got a similar error message with directmappedpatch, but i solved by using the updated version of openfoam 1.6.x .
there should be a bug in directmappedpatch of version 1.6 .

hope this helps.

marco

Thomas Baumann · April 8, 2010, 12:35

Hi,

I'm working with OpenFOAM 1.6. You get this warning message, but mapping works in OF 1.6. I solved different simulations and validated it (e.d. laminar pipe flow).

Regards Thomas

April 1, 2010, 06:28	directMappedPatch in OpenFoam 1.6	#1
olhe0002 New Member Oli Join Date: Apr 2009 Posts: 27 Rep Power: 17	Hi! I'm trying to use directMappedPatch in order to sample the fluid-velocity at point x/y/z to a boundary (by using an offset). I get the message: FOAM Warning : From function directMappedPatchBase::calcMapping() const in file directMapped/directMappedPolyPatch/directMappedPatchBase.C at line 451 The actual cell/face centres picked up using offset (0 0.33 0) are not on a single plane. This might give numerical problems. At patchface (-70.1184 25.6462 2.17446) the sampled cell/face (-70.12 26.0355 2.17448) is not on a plane 0.390814 offset from the patch. You might want to shift your plane offset. Set the debug flag to get a dump of sampled cells. Does somebody know this message? Best Regards olhe

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April 8, 2010, 10:54		#2
om3ro New Member Marco Join Date: Mar 2010 Posts: 9 Rep Power: 16	I got a similar error message with directmappedpatch, but i solved by using the updated version of openfoam 1.6.x . there should be a bug in directmappedpatch of version 1.6 . hope this helps. marco

April 8, 2010, 12:35		#3
Thomas Baumann Senior Member Join Date: Apr 2009 Location: Karlsruhe, Germany Posts: 103 Rep Power: 17	Hi, I'm working with OpenFOAM 1.6. You get this warning message, but mapping works in OF 1.6. I solved different simulations and validated it (e.d. laminar pipe flow). Regards Thomas