snappyHexMesh tutorial for beginners- Flow past objects

Hello all!!!
In this tutorial, I briefly explained how to use snappyHexMeshing in OpenFOAM. I also briefly discussed how to make your models with FreeCAD (Free open-source software) for making your object file and export it to OpenFOAM for meshing.
This tutorial is mainly for beginners.
Screencast recorded in Ubuntu 16.04 with KAZAM.
I am thankful to OpenFOAM, FreeCAD, and MeshLab community.

[@aero_cats]

Great tutorial! Hope to see your further simulations, keep uploading!

[@jordandenev5305]

Well done - you really concentrated on the important steps. The video is quite usefull for my beginner-level.

[@sriharisha251]

Make more please. Your clarity is amazing.

[@chloealexisharris602]

Very good tutorial. Thanks!

[@hebaalaaeldin2596]

That was very helpful, Thank you!

[@sachithperera4626]

Great job. Nailed it.

[@aimanshuhaimi1068]

Hi. May I know, how do you create the files as shown in the video? I managed to install the OpenFOAM but seems like I can't find those files.

[@ShyamUHS]

You can find those files in tutorial folder in openfoam installation directory, select the files according to our case

[@minzhang2848]

It is a very nice video. Thanks!

[@thucpham4598]

Thank you for your video. I tried but when I ran openfoam, the position of cylinder was different from in freecad. Do you know why?

[@danatothova8728]

Thank you for the video, it is great. Do you know what could be wrong with my mesh? I am creating a mesh of a rectangular tank with a pipe. I get a mesh at the walls of the tank and at the walls of the pipe, but there is no internal mesh. Thanks!

[@engineeringtalks7727]

It seems to be a issue with viewing in paraview if I am correct. You can try checking the mesh by using volume instead of surface. The other issue may be with locationInMesh.. check that one as well

[@qwertyman9560]

Very useful, thanks

[@hellsing48]

I can't tick off the Binary Encoding in MeshLab. Why is that?

[@hellsing48]

To answer my own question... It is possible to export ascii stl file directly from FreeCAD. If you go to Mesh Design wb > Meshes > Create mesh from shape... ; Export mesh to file > choose ascii stl format

[@eda364]

Hi. When I use the command surfaceFeatureExtract appaers the following error: Reading surfaceFeatureExtractDict --> FOAM FATAL ERROR: (openfoam-2012) No surfaces specified/found for entry: cube.stl From int main(int, char**) in file surfaceFeatureExtract.C at line 305. FOAM exiting I am not sure where the error come from, since the name of the file is the same as the name in the triSurface folder.

[@TopCornerFacts]

Please make a tutorial on using sHM with reactingParcelFilmFoam solver, thank you!

[@danielmolina7540]

Great video. Do you mind posting the files used somewhere so that I may try to see what is wrong with my setup? I keep on receiving this error from snappyHexMesh: Reading refinement surfaces. --> FOAM FATAL ERROR: Not implemented From function virtual Foam::Istream& Foam::ITstream::read(char*, std::streamsize) in file db/IOstreams/Tstreams/ITstream.C at line 159. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::ITstream::read(char*, long) at ??:? #3 Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::FixedList&) at ??:? #4 Foam::refinementSurfaces::refinementSurfaces(Foam::searchableSurfaces const&, Foam::dictionary const&, int) at ??:? #5 ? at ??:? #6 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #7 ? at ??:? Aborted (core dumped)

[@luisarmandobispo5142]

Hi! Can you show the result of the command checkMesh -allTopology -allGeometry?

[@murchanaab]

What type of mesh is created by SnappyHexMesh? For example.. Polyhedral, tetrahedral etc?

[@turbochargersutututu]

How do I add inflation layers to this mesh, to account for reasonable y+

[@momosh59]

Sir, thanks for your great tutorial. Could you please the files?

[@angeloarcasedda6267]

Thank You! :D

[@Classmates12]

sir how to get these directry?

[@johnramirez6906]

Please review your video before. Remove unnesesary super-mega detailed explanation. And focus on the important and necesary steps.

[@GPonnoos]

see some people need super mega explanation, not everyone is super easy with the basics.

[@samikmaiti9339]

😃 this is an Indian style of explanation; we need that detailed explanation who is in beginner lever.

[@MrRevancheRay]

eventhough I am not a real beginner, I still prefere detailed explanation instead of those fast result oriented vids. They won't help much