Null Domain Pointer Error when importing CGNS mesh

November 20, 2005, 22:07

I am getting the following error when I attempt to import a CGNS mesh file into Fluent: ------------------------------------------------------
: /file/import/cgns/mesh

CGNS file name [] tomgrid_3.cgns

Reading "| utility fe2ram -tCGNS -d3 tomgrid_3.cgns"...

Starting exec /usr/local/Fluent.Inc/utility/fe2ram4.3/lnx86/fe2ram.4.3.11 -tCGNS -d3 tomgrid_3.cgns

CGNS file to RAMPANT file

Read 712937 nodes, 781813 elements, 1 groups.

8416 tet elements

10994 pyramid elements

189839 wedge elements

572564 hex elements

Building...

grid,

Error: Null Domain Pointer

Error Object: #f

----------------------------------------------------------- Fluent obviously isn't happy with the mesh. I am trying to diagnose the problem with the CGNS file. It would be a great help if I could figure out what the above error message means.

Thanks, Matt

November 23, 2005, 18:37

negative cells or skewness levels so high the solver is interpreting these cells as completely flat with neg. volumes. go back to your grid and check for skewness.

November 26, 2005, 02:01

Well, why didn't they just say so! I have discovered the negative volumes. Thanks for the translation.

Matt

November 20, 2005, 22:07	Null Domain Pointer Error when importing CGNS mesh	#1
Matt Guest Posts: n/a	I am getting the following error when I attempt to import a CGNS mesh file into Fluent: ------------------------------------------------------ : /file/import/cgns/mesh CGNS file name [] tomgrid_3.cgns Reading "\| utility fe2ram -tCGNS -d3 tomgrid_3.cgns"... Starting exec /usr/local/Fluent.Inc/utility/fe2ram4.3/lnx86/fe2ram.4.3.11 -tCGNS -d3 tomgrid_3.cgns CGNS file to RAMPANT file Read 712937 nodes, 781813 elements, 1 groups. 8416 tet elements 10994 pyramid elements 189839 wedge elements 572564 hex elements Building... grid, Error: Null Domain Pointer Error Object: #f ----------------------------------------------------------- Fluent obviously isn't happy with the mesh. I am trying to diagnose the problem with the CGNS file. It would be a great help if I could figure out what the above error message means. Thanks, Matt

November 23, 2005, 18:37	Re: Null Domain Pointer Error when importing CGNS	#2
Noelle Guest Posts: n/a	negative cells or skewness levels so high the solver is interpreting these cells as completely flat with neg. volumes. go back to your grid and check for skewness.

November 26, 2005, 02:01	Re: Null Domain Pointer Error when importing CGNS	#3
Matt Guest Posts: n/a	Well, why didn't they just say so! I have discovered the negative volumes. Thanks for the translation. Matt

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