[hussainazam2002]

I am a beginner to openfoam and have been working on a project for a few weeks now trying to navigate my way around to learn how to use it. Initially on one of my test mesh models I used, i easily ran surfaceFeatureExtract and an emesh file was made and i could see this in the constant/triSurface/ directory.

Now after some fixing of my model and a lot of trial and error with many different models ( built in CAD exported as STL files) I have come back to running the command to make the emesh file. I did this normaly many times before but it just will not work anymore. I am not getting any errors, I have checked my stl file using meshlab and rebooted my computer. I used my old stl files where earlier the command was working and emesh was forming, but now even this wont work. I dont get an error and get a generation time of 0 seconds (instant). I have attached some screenshots below and would appreciate any help to overcome this issue.

[Yann]

Hello Hussain,

Your surfaceFeatureExtractDict looks weird, you should not have a "geometry" dictionary there. Have a look at this example: https://develop.openfoam.com/Develop...ureExtractDict

You should have something like:

closed1.stl
{
    extractionMethod    extractFromSurface;
    includedAngle       120;
}

Regards,
Yann

[hussainazam2002]

Hi Yann,

Thank you for your help, I cant believe I was stuck on such a simple error for so long.

I have another question regarding the meshing process if you are able to help. I build a CAD model of a very simplified reactor in Solidworks. I cut a hole out of the side of the reactor. I then created a surface coincident to this and defined this as an inlet. I have 3 similar surface bodies and 1 solid body. I exported all of these as stl files to openfoam. I have generated emesh and added them all to my snappyHexMesh file. My blockMeshDict file is very simple and creates a cuboidal geometry. I ran snappyHexMesh and it finished and I opened the case in paraview. The geometry shows only a cuboid. I am guessing this has something to do with my snappyHexMesh not being read correctly. This is confusing as in the mesh region on paraview it shows the all the different patches i had defined.

Would you have any idea as to what I have done wrong or what I could change ??

Best regards,
Hussain

[Yann]

Hello Hussain,

It's difficult to answer, as many things could have been done wrong.

If you can share your snappyHexMeshDict file and some screenshots of your resulting mesh, it could be helpful to know what is going on.

Regards,
Yann