[m.atifme20]

Hi I am a newbie in OpenFOAM. I am trying to run simpleFoam analysis of a tractor-trailer. I have copied the code from the university document which was working perfectly before. I followed all steps but used different software(solidworks) to create geometry. I placed .stl file in constant/trySurface folder. When I am using the command surfaceFeatureExtract it is giving the error below. It seems to me that the solver could not read the .stl file. I have checked the names in surfaceFeatureExtractDict which is same.
I have run the motorBike tutorial which was running fine. I am using openFOAM v7. Please find attached file of geometry and surfaceFeatureExtractDict.
Any help will be highly appreciated!

/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 7
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
Build : 7-3bcbaf946ae9
Exec : surfaceFeatureExtract
Date : Oct 21 2020
Time : 17:02:09
Host : "Atif-pc"
PID : 594
I/O : uncollated
Case : /mnt/c/Users/Admin/Documents/openFoam/practice/truckAnalysis
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Reading surfaceFeatureExtractDict

Surface : "Truck-Geometry.stl"


Feature line extraction is only valid on closed manifold surfaces.


--> FOAM FATAL ERROR:
Cannot read "/mnt/c/Users/Admin/Documents/openFoam/practice/truckAnalysis/constant/triSurface/Truck-Geometry.stl"

From function bool Foam::triSurface::read(const Foam::fileName&, const Foam::word&, bool)
in file triSurface/triSurface.C at line 304.

FOAM exiting

[DramaDrummer]

Hi Muhammad!
Don't know if it still helps you, but I would have two possible solutions:
1. As far as I know, in newer versions of OF surfaceFeatureExtract was replaced by surfaceFeatures. For this you would need the surfaceFeaturesDict, which (I think) looks similar to the surfaceFeatureExtractDict. Just look into the tutorials
2. More likely, the problem is a miss spelling of your .stl file or this file being in the wrong folder. From the code triSurface.C at line 304 you can see that this error comes up when the software is unable to find the file.


Hope this helps out.
Kevin

[R786]

Hello,
I am having a similar problem as follows, please can anyone help:
Note: Feature line extraction only valid on closed manifold surfaces

Reading surfaceFeatureExtractDict

Surfaces : body.stl
Output : body
Load options : offset
Write options: writeObj=off writeVTK=off

Statistics:
Triangles : 13754331 in 1 region(s)
Vertices : 6669391
Bounding Box : (0.0980459 0.0999999 -6e-05) (7.1459 7.5 1.45325)

Constructing feature set from included angle 150
Selecting edges based purely on geometric tests: no
Killed

[DramaDrummer]

Hi there,


two notes that will probably help you:

1. Change from surfaceFeatureExtract to surfaceFeatures, since this is the newer version.
2. Looks like your problem could be the fact there are no features with an angle < 150° in the stl.

Best
Kevin

[GeorgesSR]

Greetings, I have a similar issue to run surfaceFeatureExtract, but I also can't seem to run the new command surfaceFeatures, would anyone please know why ?

[AtoHM]

An top, you run surfaceFeatureExtract which fails, because it is missing surfaceFeatureExtractDict to work with.


At the bottom, you try to run surfaceFeatures which is missing, because you are working with the ESI-branch of OpenFOAM (indicated by the numbering v2212, the foundation branch uses OpenFOAM 9, 10, 11 and so on as versioning). In the ESI branch the utility has not been renamed and is still called surfaceFeatureExtract. I use this syntax in surfaceFeatureExtractDict: surfaceFeatureExtract

[DramaDrummer]

Thanks AtoHM for the detailed reply!

So for Georges to summarize: You just have to rename your surfaceFeaturesDict to surfaceFeatureExtractDict.

[GeorgesSR]

Thank you for both of your replies.
I fixed the issue but it told me my object was non-manifold, I tried to make a new/simpler one in blender, a very simple box (the basic blender box primitive) with a bit of thickness, 0 problem of manifold inside blender, then snappyHexMesh-GUI, but still... object non-manifold :'(