Got a question on finding the boundary value with a known boundary face label

frankyux · September 11, 2011, 16:36

Hi all,

Just got a question on finding the boundary value with a known boundary face label, it seems quite straight forward but somehow confused me.

I can do the following to find a boundary face label:

meshSearch ms(mesh());
label faceLabel = ms.findNearestBoundaryFace(X);

and trying to get the corresponding value on the boundary:

"vf.boundaryField()[ ? ][faceLabel]"

Now in the question mark [?], unlike internalField, boundaryField contains more than one patches, thus I will need to know the patch label in front of the face label. One way I can do is just make a loop for all patches and check which is the one the face belongs to, but it seems stupid. I just wondering if there's any simple ways to solve it.

Thanks.

regards
Frank

frankyux · September 14, 2011, 15:26

Found something useful, I can use

label patchId=mesh().boundaryMesh().whichPatch(myFaceLab el);

to identify the patch index with given face label.

September 11, 2011, 16:36	Got a question on finding the boundary value with a known boundary face label	#1
frankyux New Member Frank Yu Join Date: Jun 2011 Location: Toronto, ON Posts: 15 Rep Power: 15	Hi all, Just got a question on finding the boundary value with a known boundary face label, it seems quite straight forward but somehow confused me. I can do the following to find a boundary face label: meshSearch ms(mesh()); label faceLabel = ms.findNearestBoundaryFace(X); and trying to get the corresponding value on the boundary: "vf.boundaryField()[ ? ][faceLabel]" Now in the question mark [?], unlike internalField, boundaryField contains more than one patches, thus I will need to know the patch label in front of the face label. One way I can do is just make a loop for all patches and check which is the one the face belongs to, but it seems stupid. I just wondering if there's any simple ways to solve it. Thanks. regards Frank

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September 14, 2011, 15:26		#2
frankyux New Member Frank Yu Join Date: Jun 2011 Location: Toronto, ON Posts: 15 Rep Power: 15	Found something useful, I can use label patchId=mesh().boundaryMesh().whichPatch(myFaceLab el); to identify the patch index with given face label.