a question about refineMesh

fangliu · June 22, 2011, 09:09

Hi everybody!
I' like using refineMesh to refime the mesh like below

but the result is like below

what should I do?
Thanks very much!

fangliu · June 22, 2011, 20:46

I have fund the answer, the refineMesh works well.The refined grids just like the first figure, but the paraview's display is not correct， The diagonal lines are of fictitious. I still do not know how to correct it.

fangliu · June 22, 2011, 20:59

Checking the "Use VTkPolyhedron", paraview will show the correct display.

openfoam_user · June 28, 2011, 05:29

Hi,

Where is located the "Use VTkPolyhedron" in paraFoam ?

Regards,

Stephane.

fangliu · June 28, 2011, 21:35

Hi,
If you compile "PV3FoamReader Module" correctly, the paraview's "Object Inspector" looks like figure below ,you can check "use VTKPolyhedron".

but if you failed to compile "PV3FoamReader Module", paraview can still work, the "Object Inspector" looks like figure below ,you can not check "use VTKPolyhedron", the display is not correct, but the grids are ok.

Fransje · September 5, 2011, 11:35

Hi All,

OpenFOAM cannot use meshes with floating nodes, so no the, diagonals are not fictitious. Valid cell shapes recognized by OpenFOAM can be found here. Therefore, to correctly close the mesh shown in the first post, OpenFOAM will create triangles, which is consistent with the diagonals shown in paraview/paraFoam.

Kind regards,

Francois.

giovanni10 · October 31, 2011, 11:22

Does anyone know how I can refine a specific region in a cavity for example?
Thanks!

ic3wall · January 20, 2012, 16:14

Quote:

Originally Posted by fangliu

Hi everybody!
I' like using refineMesh to refime the mesh like below

but the result is like below

what should I do?
Thanks very much!

I have the exact OPPOSITE problem ... refineMesh doesn't add the diagonal, so two faces are orthogonal to another single face, which creates problems

Is there a switch somewhere in the refineMeshDict that I haven't seen ???

October 31, 2011, 11:22	how I can refine a specific region?	#7
giovanni10 New Member giovanni silva Join Date: Jul 2010 Posts: 14 Rep Power: 4	Does anyone know how I can refine a specific region in a cavity for example? Thanks!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cannot refineMesh with useHexTopology true ver141	naoki	OpenFOAM Bugs	5	June 11, 2008 04:07
Unanswered question	niklas	OpenFOAM	0	December 14, 2005 09:11
Poisson Solver question	Suresh	Main CFD Forum	3	August 12, 2005 04:37
CHANNEL FLOW: a question and a request	Carlos	Main CFD Forum	4	August 23, 2002 05:55
question	K.L.Huang	CD-adapco	1	March 29, 2000 03:57

June 22, 2011, 20:46		#2
fangliu New Member liufang Join Date: Jun 2011 Posts: 4 Rep Power: 3	I have fund the answer, the refineMesh works well.The refined grids just like the first figure, but the paraview's display is not correct， The diagonal lines are of fictitious. I still do not know how to correct it.

June 22, 2011, 20:59		#3
fangliu New Member liufang Join Date: Jun 2011 Posts: 4 Rep Power: 3	Checking the "Use VTkPolyhedron", paraview will show the correct display.

June 28, 2011, 05:29		#4
openfoam_user Senior Member stephane sanchi Join Date: Mar 2009 Posts: 287 Rep Power: 7	Hi, Where is located the "Use VTkPolyhedron" in paraFoam ? Regards, Stephane.

September 5, 2011, 11:35		#6
Fransje Senior Member Francois Join Date: Jun 2010 Location: Netherlands Posts: 100 Rep Power: 4	Hi All, OpenFOAM cannot use meshes with floating nodes, so no the, diagonals are not fictitious. Valid cell shapes recognized by OpenFOAM can be found here. Therefore, to correctly close the mesh shown in the first post, OpenFOAM will create triangles, which is consistent with the diagonals shown in paraview/paraFoam. Kind regards, Francois.