[snappyHexMesh] snapEdge - failure

Tobi · January 30, 2011, 07:01

Hi all,

i wanna test the snapEdge tool and downloaded it from the wiki and installed it correctly.

If i run snapEdge i got a error message that he can 't read the "stl" file.

Code:

--> FOAM FATAL ERROR: 
Cannnot read "inlet.stl"

    From function triSurface::read(const fileName&, const word&, const bool)
    in file triSurface/triSurface.C at line 371.

FOAM exiting

does someone know these error message ?
I ve had a look at the triSurface.C file but there is just the error-report line.

thanks

Tobi

Tobi · January 30, 2011, 07:30

Okay - prolbem solved

the STL has to be in the "case" dictionary. Not in the triSurface.

Tobi

niklas · January 31, 2011, 02:43

Let me know how it works.
I've come up with a whole new algorithm and
I'm working on a complete re-write of this tool.

Tobi · February 16, 2011, 08:28

Hi niklas,

i ve been working on a chtMultiRegion case and got very small and big mappedWall types.

Your tool is fantastic for that. without it i never get the interfaces correctly.
Its simple and good.

1. castellated (sHM)
2. snap (sHM)
3. snapEdge
(4. addLayers)

thats it

Great tool...

Here an picture.

Good work
Tobi

Hanno · February 24, 2011, 05:46

Hey Niklas,

im very interested in your work. You've got any further with your re-write?

And, most important: is there a way to run your tool in parallel? decomposePar + mpirun doesn't do the job

niklas · February 24, 2011, 06:49

Quote:

Originally Posted by Hanno

Hey Niklas,

im very interested in your work. You've got any further with your re-write?

yes, but I need to clean it and make it more structured, otherwise I'm quite happy with the new
algorithm.
It works better I think.

N

Hanno · February 24, 2011, 07:33

Quote:

Originally Posted by niklas

yes, but I need to clean it and make it more structured, otherwise I'm quite happy with the new
algorithm.
It works better I think.

N

Please get me informed as soon as you have it ready to share. I try to mesh a pretty complex geometry (with only 90° angles) with SHM+SE but SE doesnt do the job so far.

niklas · February 25, 2011, 08:46

Try this one and if it fails I'd like to look at your stl if its possible.
(Note that its no longer necessary to link the stl to from the constant/triSurface directory)
http://openfoam.nequam.se/cases/snapEdge_110225.tgz

Everyting is now in a separate class to make it easier for those who want to incorporate snapEdge
with snappy.

N

braennstroem · February 26, 2011, 03:06

Hi Niklas,

does this work in parallel as well!?

Best Regards!
Fabian

niklas · February 26, 2011, 09:14

nope, it does not.

braennstroem · February 26, 2011, 10:53

thanks for the quick response.

Hanno · February 28, 2011, 07:55

Hey Niklas,

thanks a lot, i'll give it a try and report results later!

hfs · October 30, 2012, 11:09

Quote:

Originally Posted by niklas

Try this one and if it fails I'd like to look at your stl if its possible.
(Note that its no longer necessary to link the stl to from the constant/triSurface directory)
http://openfoam.nequam.se/cases/snapEdge_110225.tgz

Everyting is now in a separate class to make it easier for those who want to incorporate snapEdge
with snappy.

N

Hello Niklas,

Thank you very much for providing the tool!

I have tried it with my STL .. did not really work for me

Please check my STL if you have time

and If you have more time please check my case under this link:
http://dl.dropbox.com/u/32336583/Case.zip

Thanks a lot!

niklas · October 31, 2012, 03:37

it looks like you are trying to 'snap' to a surface.
this tool only work on edges.

hfs · October 31, 2012, 04:10

Quote:

Originally Posted by niklas

it looks like you are trying to 'snap' to a surface.
this tool only work on edges.

Exactly.

Could you please advice? I have tried to play around with snapping parameters ... I increased snapping iterations (5000 iterations) ... I have disabled all snapping controls ... nothing is working

Really appreciate your guidance!

Regards,

niklas · October 31, 2012, 05:08

How do you get the Umb patch?

niklas · October 31, 2012, 05:58

Does these work better?

hfs · October 31, 2012, 06:34

Quote:

Originally Posted by niklas

How do you get the Umb patch?

Thanks for your quick reply

I got Umb patch from an STL file... this is what I did

1-Extracted the geometry from the STL and convert it to emesh using the command: surfaceFeatureExtract -includedAngle 150 -writeObj constant/triSurface/Umb.stl Umb

2-Duplicated edges in emesh (simply by copy-pasting) as recommended here (http://www.cfd-online.com/Forums/ope...rane-edge.html)

3-Converted this emesh file to faceZones by adding faceZone Umb; cellZone Umb; cellZoneInside inside; to snappyHexMeshDict as follows:

refinementSurfaces
{
Umb
{
// Surface-wise min and max refinement level
level (2 2);
faceZone Umb;
cellZone Umb;
cellZoneInside inside;
}
}

4- After the SHM, I converted this faceZones into Patches using the command: createBaffles Umb '(Umb Umb)'

hfs · October 31, 2012, 06:39

Quote:

Originally Posted by niklas

Does these work better?

Wow!
Thank you very muchhh!!!

It is snapped very nicely! ...

Is this here the secret?: [faceType boundary;]

In blockMesh: Is creating one patch for all other patches as an empty patch is better for snapping?? Why??

Thanks again!

niklas · October 31, 2012, 07:23

ok, thats good. I've been trying to get the edges to actually match also, but for some reason they wont.

I dont know why.

I dont have time to look into this now. If I do, ill post the solution here.

N

January 30, 2011, 07:01	snapEdge - failure	#1
Tobi Super Moderator Tobias Holzmann Join Date: Oct 2010 Location: Bad Wörishofen Posts: 2,711 Blog Entries: 6 Rep Power: 52	Hi all, i wanna test the snapEdge tool and downloaded it from the wiki and installed it correctly. If i run snapEdge i got a error message that he can 't read the "stl" file. Code: --> FOAM FATAL ERROR: Cannnot read "inlet.stl" From function triSurface::read(const fileName&, const word&, const bool) in file triSurface/triSurface.C at line 371. FOAM exiting does someone know these error message ? I ve had a look at the triSurface.C file but there is just the error-report line. thanks Tobi

February 24, 2011, 05:46	snapEdge	#5
Hanno New Member Hannes Join Date: Dec 2010 Location: Oldenburg, Germany Posts: 17 Rep Power: 15	Hey Niklas, im very interested in your work. You've got any further with your re-write? And, most important: is there a way to run your tool in parallel? decomposePar + mpirun doesn't do the job Last edited by Hanno; February 24, 2011 at 06:48.

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January 30, 2011, 07:30		#2
Tobi Super Moderator Tobias Holzmann Join Date: Oct 2010 Location: Bad Wörishofen Posts: 2,711 Blog Entries: 6 Rep Power: 52	Okay - prolbem solved the STL has to be in the "case" dictionary. Not in the triSurface. Tobi

January 31, 2011, 02:43		#3
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	Let me know how it works. I've come up with a whole new algorithm and I'm working on a complete re-write of this tool.

February 25, 2011, 08:46		#8
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	Try this one and if it fails I'd like to look at your stl if its possible. (Note that its no longer necessary to link the stl to from the constant/triSurface directory) http://openfoam.nequam.se/cases/snapEdge_110225.tgz Everyting is now in a separate class to make it easier for those who want to incorporate snapEdge with snappy. N

February 26, 2011, 03:06		#9
braennstroem Senior Member Fabian Braennstroem Join Date: Mar 2009 Posts: 407 Rep Power: 19	Hi Niklas, does this work in parallel as well!? Best Regards! Fabian

February 26, 2011, 09:14		#10
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	nope, it does not.

February 26, 2011, 10:53		#11
braennstroem Senior Member Fabian Braennstroem Join Date: Mar 2009 Posts: 407 Rep Power: 19	thanks for the quick response.

February 28, 2011, 07:55		#12
Hanno New Member Hannes Join Date: Dec 2010 Location: Oldenburg, Germany Posts: 17 Rep Power: 15	Hey Niklas, thanks a lot, i'll give it a try and report results later!

October 31, 2012, 03:37		#14
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	it looks like you are trying to 'snap' to a surface. this tool only work on edges.

October 31, 2012, 05:08		#16
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	How do you get the Umb patch?

October 31, 2012, 07:23		#20
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	ok, thats good. I've been trying to get the edges to actually match also, but for some reason they wont. I dont know why. I dont have time to look into this now. If I do, ill post the solution here. N