CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   ANSYS Meshing & Geometry (https://www.cfd-online.com/Forums/ansys-meshing/)
-   -   [ANSYS Meshing] Build grid: Aborted due to critical error (https://www.cfd-online.com/Forums/ansys-meshing/96770-build-grid-aborted-due-critical-error.html)

srikrishnacs January 31, 2012 11:54
Build grid: Aborted due to critical error
 
Hi All,
I am having issues with importing my 2D mesh into Fluent. The geometry has a simple conical nozzle extending into a test section that has a truncated conical specimen placed inside. Its a PATRAN file created using ESI's CFD-GEOM. I did check my grid 100 times for flaws and found none. I tried different domain configurations to make this work but that was just a waste of time. When I break my grid into 2 different pieces i.e., nozzle and test section, I am able to import them successfully. But when it comes to the whole setup, the error message " Build grid: Aborted due to critical error" pops up and the the function window says " Cell centroid is xc: "(some value)" and yc : "(some value)"
WARNING: no face with given nodes. Thread 1, cell 22109
Clearing partially read grid.
Error: Build grid: Aborted due to critical error
Error object: #f "

Please suggest some good techniques to make this work.

Far January 31, 2012 12:06
it is 2d mesh?

Hybrid January 31, 2012 12:49
A number of reasons can produce this error, don't know exactly which one?

  1. may be negative volumes? or
  2. a very very small volume? or
  3. orientation of blocks/surfaces problem? or
  4. Fastran didn't export file correctly or if you copy from another PC , incorrect copy.
  5. may be more?
I have faced this a few times. I usually revisit my mesh and try to correct all the above I mention. You can do:


  1. try to open in a serial Fluent, problem may be solved. or
  2. export in any other format accepted for fluent like CGNS/NASTRAN from FASTRAN. If problem is still there you have to remake/correct you mesh.


Regards

Hybrid

srikrishnacs February 1, 2012 21:41
@Far: It is a 2D mesh and I trying to import it into ANSYS 13,0.
@Ali: Thanks for the suggestions. I did try importing it in different formats but that did nit work either. May be I just need to fiddle around the mesh till it gets imported. Is there any other reason that you can think of ?

Far February 1, 2012 23:14
Your mesh must be on the x-y plane, a requirement of Fluent

Hybrid February 7, 2012 11:47
try to load ur file in tgrid or icem!

cagri.metin.ege August 2, 2013 14:15
"
Quote:
Originally Posted by srikrishnacs (Post 342133)
Hi All,
I am having issues with importing my 2D mesh into Fluent. The geometry has a simple conical nozzle extending into a test section that has a truncated conical specimen placed inside. Its a PATRAN file created using ESI's CFD-GEOM. I did check my grid 100 times for flaws and found none. I tried different domain configurations to make this work but that was just a waste of time. When I break my grid into 2 different pieces i.e., nozzle and test section, I am able to import them successfully. But when it comes to the whole setup, the error message " Build grid: Aborted due to critical error" pops up and the the function window says " Cell centroid is xc: "(some value)" and yc : "(some value)"
WARNING: no face with given nodes. Thread 1, cell 22109
Clearing partially read grid.
Error: Build grid: Aborted due to critical error
Error object: #f "


Please suggest some good techniques to make this work.
"



I have same problem you can see problem curve when uncheck shells under mesh and associate that curve , on the other hand if you working sharp tail edge and you should create a curve this is important which is associated curve of airfoil

Hamed1117 June 14, 2017 05:03
negative volume cells
 
In my case (ICEM CFD block mesh), I had plenty of negative volume cells because of inverted blocks.

Then I fixed inverted blocks by >> Blocking/BlockChecks/method/Fix Inverted Blocks, and it solved the problem.

mehran.mo July 1, 2018 15:38
thank you, your solution worked very well

poopo November 19, 2018 20:34
Quote:
Originally Posted by Hamed1117 (Post 653120)
In my case (ICEM CFD block mesh), I had plenty of negative volume cells because of inverted blocks.

Then I fixed inverted blocks by >> Blocking/BlockChecks/method/Fix Inverted Blocks, and it solved the problem.
thank you it works well

namratha98 March 13, 2019 02:15
hi, i fixed those inverted blocks too. even then it shows the same error. so,what else would be the problem?


All times are GMT -4. The time now is 08:40.