Error when importing cgns mesh created with numeca

Pe2 · May 14, 2009, 03:58

Hi

I do some turbomachinery simulations. For grid generation I use numeca, and for the simulation I use CFX11.

Numeca creates the mesh in cgns.

When I import the mesh I always several error messages of this type:

Code:

GTMAPI::importmeshToModel - The importing process reported the following warning(s) while importing
the mesh from the requested file:

  Unable to map nodes in interface "bc_6" between Zone "row_1_flux_1_Blade_1_down"
  and "row_1_flux_1_Blade_1_up" as the not all nodes could be equivalenced.

The simulation runs and I don't think I have any issues with this problem, but I am not sure.

So my question is: Have anyone else had this problem? Do you know what causes this? And does it influence the simulation result?

ghorrocks · May 14, 2009, 18:30

Hi,

I think this error is saying it can't equivalence nodes across a periodic boundary. If the nodes across the periodic boundary don't match then ignore the error and use a GGI periodic boundary. If they should match then you will probably adjust the equivalencing tolerance so they match. Then you will be able to use a 1to1 periodic boundary and this is faster and more accurate - but not a show stopper if you can't do it.

Glenn Horrocks

May 14, 2009, 03:58	Error when importing cgns mesh created with numeca	#1
Pe2 New Member Petter Join Date: May 2009 Posts: 1 Rep Power: 0	Hi I do some turbomachinery simulations. For grid generation I use numeca, and for the simulation I use CFX11. Numeca creates the mesh in cgns. When I import the mesh I always several error messages of this type: Code: GTMAPI::importmeshToModel - The importing process reported the following warning(s) while importing the mesh from the requested file: Unable to map nodes in interface "bc_6" between Zone "row_1_flux_1_Blade_1_down" and "row_1_flux_1_Blade_1_up" as the not all nodes could be equivalenced. The simulation runs and I don't think I have any issues with this problem, but I am not sure. So my question is: Have anyone else had this problem? Do you know what causes this? And does it influence the simulation result?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Moving mesh	Niklas Wikstrom (Wikstrom)	OpenFOAM Running, Solving & CFD	122	June 15, 2014 06:20
Null Domain Pointer Error when importing CGNS mesh	Matt	FLUENT	2	November 26, 2005 01:01
Importing Patran mesh into Gambit	Trac	FLUENT	1	September 29, 2005 10:32
importing mesh into fluent	ch	FLUENT	11	July 7, 2005 16:42
Problem importing ANSYS mesh, please help	Ankan Kumar	FLUENT	1	February 2, 2003 08:38

May 14, 2009, 18:30		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Hi, I think this error is saying it can't equivalence nodes across a periodic boundary. If the nodes across the periodic boundary don't match then ignore the error and use a GGI periodic boundary. If they should match then you will probably adjust the equivalencing tolerance so they match. Then you will be able to use a 1to1 periodic boundary and this is faster and more accurate - but not a show stopper if you can't do it. Glenn Horrocks