[egp]

I generated a hex grid for a free-surface-piercing NACA 0024 using Gridgen from Pointwise, Inc. It is a simple c-type grid with clustering near the wall (for wall fxn) and near the waterplane. However, when I try to convert it, it simply hangs and does not report an error. Any suggestions on how to debug this?

Here is the output:


Exec : fluentMeshToFoam . SPNACA SPNACA/spnaca24_sublayer.cas
Date : Nov 26 2006
Time : 15:19:30
Host : ritchie.aset.psu.edu
PID : 4877
Root : /scratch/egp11
Case : SPNACA
Nprocs : 1
Create time

Reading header: "exported from Gridgen 15.09R3"
Dimension of grid: 3
Number of points: 345321
number of faces: 1005100
Number of cells: 330000
Reading points
Reading uniform cells
Reading zone data
Embedded blocks in comment or unknown
Found end of section in unknown
,Reading uniform faces



FINISHED LEXING


dimension of grid: 3
Creating shapes for 3-D cells
----------this is where it hangs---------------

thanks,

Eric Paterson

[egp]

By the way, my Fluent case file was written as ASCII, and I deleted the DOS control characters using dos2unix (unfortunately, my desktop machine is a Dell).

[hjasak]

This is a strange place for the converter to hang: you have successfully finished lexing. Can I have a look at this file if it's not confidential?

Hrv

[egp]

Hrv,

You can download the file from:

http://idisk.mac.com/egpaterson-Public

It is the only file there. Also, I mistyped my original email. This grid was designed for sublayer resolution.

Eric

[hjasak]

I get a nice core dump over here:

--> FOAM FATAL ERROR : index 6 out of range 0 ... 5

It turns out that the cell number 182, defined as a hex, has got 7 (at least 7?) faces, which is wrong. The offending face index is 976015.

My guess is that you have defined a face of cell 182 to belong to two boundary patches at the same time. As usual, nothing wrong with my converter.

Hrv

[egp]

Thanks for the debug, Hrv. I'll double-check, but this would be impossible to explicitly do when using GridGen. Maybe there is a bug with the Gridgen -> Fluent converter, although I've not run into one before. I'll post back when I find the error.