Wear prediction - follow up

Submitted by alexander.polson on Tue, 12/07/2010 - 10:36

Hi Everyone

(I wanted to post the information below (and some more pictures) as part of the original "Wear prediction" topic, but the option to attach files was not further available. That is the reason I start this topic as a follow-up. Is there a better way?)

Further to the previous postings on this topic:

I dont think the problem is in Paraview. I did the following:
* I ran the chute_wear input file (in.chute_wear) on v1.2.1-beta and on v1.2.2-beta
* I used the output file "dump99800.vtk" from both above versions of LIGGGHTS to make attached image files that:
~ show centers of triangles (calculated from the POINTS and POLYGON data in above dump files);
~ centers are colour-coded red if the wear is zero, and green if non-zero

From the above mentioned images one sees that, again, wear is only predicted for the bottom-left corner of the model. I expected that wear be predicted in more or less a mirror image accross the horizontal centerline of the model, i.e. top left of model should be mirror of bottom left?

Referring to attached files it appears the same problem exist as previously reported.

Could somebody (Chris?) please send me "dump99800.vtk" from you simulation if you think yours works fine? I assume that the original input file is used unchanged in all cases.

Kind regards

Alexander

AttachmentSize
Image icon wear_1p2p1.png41.72 KB
Image icon wear_1p2p2.png41.71 KB
ckloss's picture

ckloss | Tue, 12/07/2010 - 11:24

Ok, I found the issue now... I guess you used 12 processors for the simulation?
Unfortunately, the script to auto-generate the tarball left out a part of the code that was vital for writing out the data correctly in parallel. I will patch that for 1.2.3

Cheers,
Christoph

alexander.polson | Tue, 12/07/2010 - 11:45

Hi Christoph

Yes, I also forgot something. I did not mention that I used 8 cpu's, i.e. "processors 2 2 2".

I would appreciate to receive the fix, because I am preparing for some presentations that shows the wear functionality.

Kind regards

Alexander

ckloss's picture

ckloss | Tue, 12/07/2010 - 12:07

I can't say when I will post the fix. But if you run the wear prediction in serial in the meanwhile, everything should be fine

Christoph

alexander.polson | Tue, 12/07/2010 - 12:28

Thank you Christoph,

Off-course. I did not think of that.

Kind regards

Alex

prasantud | Sun, 08/07/2011 - 13:48

Hi everybody,
I am recently running the in.chute_wear without any modification. It is generating the vtk files and the dump file without the velocity. It shows the following error while running on the screen.

WARNING: You are using the wear model, which is currently in beta mode!
WARNING: Dump mesh/gran/VTK contains a mesh with no velocity allocated, will not dump velocity

Needs your valuable suggestions.

thanking you
Samantaray