CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[Gmsh] unused points

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 23, 2010, 05:53
Default unused points
  #1
Member
 
Arina
Join Date: Oct 2009
Location: Belarus
Posts: 71
Rep Power: 17
Akuji is on a distinguished road
Send a message via ICQ to Akuji
Hi there,

how can I delete unused points, when I use gmshToFoam?
Because of it I 've got an error using checkMesh
Akuji is offline   Reply With Quote

Old   November 30, 2010, 09:04
Default
  #2
Senior Member
 
Join Date: Sep 2010
Posts: 226
Rep Power: 17
T.D. is on a distinguished road
Quote:
Originally Posted by Akuji View Post
Hi there,

how can I delete unused points, when I use gmshToFoam?
Because of it I 've got an error using checkMesh
Hi Akuji,
after you converted using gmshToFoam you open the constant/PolyMesh/boundary file
and inside it you delete the last one "defaultFaces" and you also change the "number" on top of the boundary patches to "number-1" and all will be ok.

Good Luck
T.D. is offline   Reply With Quote

Old   December 1, 2010, 05:18
Default
  #3
Member
 
Arina
Join Date: Oct 2009
Location: Belarus
Posts: 71
Rep Power: 17
Akuji is on a distinguished road
Send a message via ICQ to Akuji
Quote:
Originally Posted by T.D. View Post
Hi Akuji,
after you converted using gmshToFoam you open the constant/PolyMesh/boundary file
and inside it you delete the last one "defaultFaces" and you also change the "number" on top of the boundary patches to "number-1" and all will be ok.

Good Luck
Thnx for replay,
but it doesn't work. Also, after using gmshToFoam in /constant/polyMesh/boundary I haven't a defaultFAces. I see faces, which I define.
Akuji is offline   Reply With Quote

Old   December 1, 2010, 09:17
Default
  #4
Senior Member
 
Join Date: Sep 2010
Posts: 226
Rep Power: 17
T.D. is on a distinguished road
hi,
can you send me the gmsh file ".geo"
i can check it for you if you want.
T.D. is offline   Reply With Quote

Old   December 2, 2010, 06:52
Default
  #5
Member
 
Arina
Join Date: Oct 2009
Location: Belarus
Posts: 71
Rep Power: 17
Akuji is on a distinguished road
Send a message via ICQ to Akuji
Quote:
Originally Posted by T.D. View Post
hi,
can you send me the gmsh file ".geo"
i can check it for you if you want.
I'll be grateful


Here I try to visualize a flow around a building. As I see, gmsh make a mesh inside building too, but I don;t need it. How can I delete it?..
Attached Files
File Type: txt nok2.txt (2.6 KB, 24 views)

Last edited by Akuji; December 2, 2010 at 07:49.
Akuji is offline   Reply With Quote

Old   May 11, 2012, 03:32
Default
  #6
Member
 
Abhishek
Join Date: Dec 2010
Posts: 39
Rep Power: 15
Abhishekd18 is on a distinguished road
Hi,

Did you succeed in removing unused points from openfoam mesh?
Abhishekd18 is offline   Reply With Quote

Old   May 11, 2012, 05:24
Default
  #7
Member
 
Arina
Join Date: Oct 2009
Location: Belarus
Posts: 71
Rep Power: 17
Akuji is on a distinguished road
Send a message via ICQ to Akuji
Quote:
Originally Posted by Abhishekd18 View Post
Hi,

Did you succeed in removing unused points from openfoam mesh?

Yes. I solved my problem
Akuji is offline   Reply With Quote

Old   August 1, 2012, 12:41
Default
  #8
New Member
 
Join Date: Jun 2012
Posts: 2
Rep Power: 0
karl_tae is on a distinguished road
Hello Akuji,
how did you solve your problem?

Thanks, Karl
karl_tae is offline   Reply With Quote

Old   August 6, 2012, 03:10
Default
  #9
Member
 
Arina
Join Date: Oct 2009
Location: Belarus
Posts: 71
Rep Power: 17
Akuji is on a distinguished road
Send a message via ICQ to Akuji
Quote:
Originally Posted by karl_tae View Post
Hello Akuji,
how did you solve your problem?

Thanks, Karl
Hello, Karl!


My problem was solved long time ago... I don't remember now exactly, but I think I made my geometry on another way. Also, maybe I was a little inattentive and don't include in volume some faces, lines.
Hope you will find solution for yours problem


Best, Arina
Akuji is offline   Reply With Quote

Old   August 6, 2012, 04:33
Default
  #10
New Member
 
Join Date: Jun 2012
Posts: 2
Rep Power: 0
karl_tae is on a distinguished road
Hello Arina,
thanks a lot for your answer. My problem was solved unexpectedly by Icem itself. In the forth or fith run of CheckMesh it found the unconnected vertices. I don't know, what the reason was, but okay.
So my advice for other people with similar problems: Just redo your actions in Icem. Icem just needs a little bit more time sometimes.

Best, Karl
karl_tae is offline   Reply With Quote

Old   March 16, 2013, 10:52
Default
  #11
Senior Member
 
Join Date: Nov 2012
Posts: 171
Rep Power: 14
hz283 is on a distinguished road
Hi All,

I also had this problem: there are two unused points in my mesh. But I found that the mesh can still be used for running although I do not know if the results are correct. How did you solver this problem in the stage of mesh generation?

Thanks.
H

Quote:
Originally Posted by karl_tae View Post
Hello Arina,
thanks a lot for your answer. My problem was solved unexpectedly by Icem itself. In the forth or fith run of CheckMesh it found the unconnected vertices. I don't know, what the reason was, but okay.
So my advice for other people with similar problems: Just redo your actions in Icem. Icem just needs a little bit more time sometimes.

Best, Karl
hz283 is offline   Reply With Quote

Old   January 12, 2016, 07:13
Default Same problem with Salome
  #12
New Member
 
CHAITHANYA SUGGALA
Join Date: Dec 2015
Location: Nagpur,India
Posts: 4
Blog Entries: 1
Rep Power: 10
suggalachaitu is on a distinguished road
*Unused points found in the mesh, number unused by faces: 6859 number unused by cells: 6859


how can i remove these unused points in salome.. please reply asap
suggalachaitu is offline   Reply With Quote

Old   June 10, 2017, 05:13
Default
  #13
Senior Member
 
sunilpatil's Avatar
 
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 179
Rep Power: 14
sunilpatil is on a distinguished road
Hi, I am also facing the same issue
*Unused points found in the mesh, number unused by faces: 1458 number unused by cells: 1458
<<Writing 1458 unused points to set unusedPoints

Have you solved this problem
I am using Salome for mesh generation
sunilpatil is offline   Reply With Quote

Old   February 8, 2022, 19:13
Default How to remove unused points
  #14
New Member
 
Jiri Kolar
Join Date: Dec 2016
Posts: 1
Rep Power: 0
fiery is on a distinguished road
First use "topoSet" or "setSet" to select all cells you want to extract, excluding the unusedPoints. Or just call "checkMesh", it creates cellSet without unusedPoints as well.



If the resulting cellSet is "region0":


> subsetMesh region0 -overwrite

Last edited by fiery; February 9, 2022 at 06:11.
fiery is offline   Reply With Quote

Old   June 13, 2023, 18:30
Default
  #15
Member
 
Join Date: Apr 2022
Posts: 31
Rep Power: 4
AMR96 is on a distinguished road
Hi,

I know it has been a long time since this post but I was wondering if the unused points caused any trouble with the final results?

I'm facing the same problem and not sure how to solve it.

Best,

Amirmohammad
AMR96 is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[swak4Foam] outputTime in Swak function immortality OpenFOAM Community Contributions 20 October 6, 2022 13:08
Caffa 3D code Waliur Rahman Main CFD Forum 0 May 29, 2018 01:53
[snappyHexMesh] No layers in a small gap bobburnquist OpenFOAM Meshing & Mesh Conversion 6 August 26, 2015 10:38
[snappyHexMesh] crash sHM H25E OpenFOAM Meshing & Mesh Conversion 11 November 10, 2014 12:27
[blockMesh] BlockMeshmergePatchPairs hjasak OpenFOAM Meshing & Mesh Conversion 11 August 15, 2008 08:36


All times are GMT -4. The time now is 10:43.