How can I import a multi region mesh from gmsh to OpenFoam

Thanks a lot man. Please come back. Need more videos related to OpenFOAM and Gmsh.

Thank you for guiding me through the process. 🙂

Which version of Gmsh software is this?

hi Martin, Thank you very much for the Video, Can we do this procedure for interFOAM solver alos though it is transient solver but i want to know at what second my simulation is converging, can you guide me please?

i ran your files and got the following error help me resolve the error --> FOAM FATAL ERROR: 1 not found in table. Valid entries: 0() From function const T& Foam::HashTable<T, Key, Hash>::operator[](const Key&) const [with T = int; Key = int; Hash = Foam::Hash<int>] in file /home/ubuntu/OpenFOAM/OpenFOAM-7/src/OpenFOAM/lnInclude/HashTableI.H at line 126. FOAM exiting

Hello, instead of terminating the simulation at end time (stop at - end time) could we use another criterion so the simulation automatically stop when the steady state is achieved?

thank you. changing patch types in the boundary file is what i missed. i tried to change the patch type to empty, but i didnt know i had to remove the physicalType line.

Just what I was looking for!! Thanks a lot

Hi, i got this error, how can i solve it? -> FOAM FATAL IO ERROR: cannot find file file: /home/meier/incompressible/simpleFoam/CFDwOpenFoam-master/CFDwOpenFoam-master/LaminarPipeFlow/constant/turbulenceProperties at line 0. From function regIOobject::readStream() in file db/regIOobject/regIOobjectRead.C at line 237.

Thanks for making this informative video. Can you please share your email id if I have any questions?

Can someone explain how to export the result in high quality?

thank you so much!

mate, thank you so so much, this helped me a crazy amount

Send the link where form cylinder.msh

This tutorial is very helpful, thanks a lot.

maybe if someone can try to help me, i´m having a problem on the conversion using gmshToFoam: Create time Starting to read mesh format at line 2 Read format version 4.1 ascii 0 Starting to read physical names at line 5 Physical names:8 Surface 1 cylinderWalls Surface 2 bico Surface 3 inlet Surface 4 outlet Surface 6 wallbox Surface 7 surfacebox Volume 5 internal Volume 8 fluidbox #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::sigSegv::sigHandler(int) at ??:? #2 ? in /lib/x86_64-linux-gnu/libpthread.so.0 #3 ? at ??:? #4 __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6 #5 ? at ??:? Segmentation fault (core dumped) Anyone know what made this mistakes?

We have a Discord channel for Gmsh. discord.gg/SXxvTqg , would be a pleasure having you over there as well.

Really awesome sir please don't stop making new videos

does it realy only work for simpleFoam solver as you said? for e.g interFoam it doesnt work because there is no residual control? because it isnt a stady state solver and you will never reach a stady state?

What do Rx and Nx mean ? :-( 14:38

This is great! Helped me a lot ^^

Gmsh 2.14 I needed to manually change boundary frontAndBack from "patch" to "empty" then it works. I tested on cavity flow case.

doest work

Hi Martin, Thank you so much for this detailed video, I cam across this when I was exploring to control p-residual line. I am defining three orthogonal corrector steps and this lead to frequent plotting of p residuals within that iteration, is there a way to control this? I am sure its been long since you uploaded this video, but any information over this matter will be really helpful for me.

VERY NICE

Thank you for give this tutorial but if we want to do more to the modle such as defining the first layer distance ,how can we do that ?

hello Martin I am studying Openfoam software. I am a new user of Openfom. I want to ask you about gnuplot. how do I install in gnuplot in openfoam software. Please ask me my quesiton.

You are missing cylinder.msh in ur github link...I need it asap...working on a project..please do that fafa

Please give links to these files

If you have gnuplot you can plot the residuals simply by accessing the residuals directory in postProcessing directory and by typing this command foamMonitor -l residuals.dat foamMonitor -logscale residuals.dat

Hey, i followed the similar steps, which you have done in your previous video and created my mesh for an airfoil. However, i got the error saying "no cells read from file airfoil.msh" after i typed "gmshToFoam airfoil.msh" on terminal. Could you please help me.

Hello Martin, It was really nice knowing some things. I would appreciate a little help from you when you have time. I have created an airfoil in gmsh and also the far field as a square. And now I am trying to import that file into opneFoam. But it is showing the following error: Create time Starting to read mesh format at line 2 Read format version 2.2 ascii 0 Starting to read physical names at line 5 Physical names:5 Line 1 inlet Line 2 outlet Line 3 wall_top Line 4 wall_bottom Surface 5 fluid Starting to read points at line 13 Vertices to be read:567598 Vertices read:567598 Starting to read cells at line 567614 Cells to be read:1123721 Mapping region 5 to Foam patch 0 Cells: total:0 hex :0 prism:0 pyr :0 tet :0 --> FOAM FATAL IO ERROR: No cells read from file "Profile7.csv.msh" Does your file specify any 3D elements (hex=5, prism=6, pyramid=7, tet=4)? Perhaps you have not exported the 3D elements? file: Profile7.csv.msh at line 1691337. From function void readCells(Foam::scalar, bool, const pointField&, const Foam::Map<int>&, Foam::IFstream&, Foam::cellShapeList&, Foam::labelList&, Foam::List<Foam::DynamicList<Foam::face> >&, Foam::labelList&, Foam::List<Foam::DynamicList<int> >&) in file gmshToFoam.C at line 742. FOAM exiting Could you help me out please! Thanks in advance

Thank you for useful tutorial, Martin! But if I don't make mistakes, the Poiseuille flow is the classic problem when the different pressures are specified at the ends of the pipe.

Hi Martin, thanks for sharing this. Maybe you could share the final .geo file, too?

Hi Martin. You did not seem to define the surfaces formed by block lines as physical groups. My confusion is that if I define them as symmetry walls, would I have flow normal to them or would they be treated as walls if I do not assign them a physical group.

Is it possible to mesh the interior of the cylinder as well? (while keeping the the element boundaries on the edge of cylinder)

Sir, I have a problem. The residuals to my 3D simulation is not converging at all. what could be the problem.?

Hi Martin many thanks for the great tutorial. I have a question. I created my geometry on auto cad and imported a step file into gmsh do the same instructions apply to creating a mesh from a step file created in auto cad you have explained here. If not how can I go about creating a mesh for my simulation. thanks

I need to simulate an empty Sphere inside a 3D-Box. There is differentiation between these two geometries, 1- Sphere and 2- Box minus Sphere. How can I define this model in Gmsh?

I don't see the file "resPlot" in OpenFOAM 2.2.2. Can you help me?

Hi Martin Einarsve, Thanks for this helpful video. Let's assume I follow everything till 14.06 and now I want to rotate all the surfaces together against the left most vertical line by 10 degree. Can you please suggest what should I do? I am expecting to get a typical pi-slice of cheese cake type shape, but not getting it. Thanks in advance. FYI, I am very new to Gmsh. Others are also welcomed to chime in. Thanks.

Hallo Mister Martin Einarsve, I have this fatal error when i try to import the mesh into OpenFoam, I don't understand why? Can you help please, I tried all the step you did, I want to know if you had to change something in the in tools, option, mesh or something in the software before you use it?--> FOAM FATAL IO ERROR: No cells read from file "gmsh_meshing.msh" Does your file specify any 3D elements (hex=5, prism=6, pyramid=7, tet=4)? Perhaps you have not exported the 3D elements? file: gmsh_meshing.msh at line 35956. From function void readCells(Foam::scalar, bool, const pointField&, const Foam::Map<int>&, Foam::IFstream&, Foam::cellShapeList&, Foam::labelList&, Foam::List<Foam::DynamicList<Foam::face> >&, Foam::labelList&, Foam::List<Foam::DynamicList<int> >&) in file gmshToFoam.C at line 729. FOAM exiting Do you know how we can import the mesh into OpenFoam from XCFD-GEOM? in wich extention we have to save the file because we don't have .msh like extention? I hope for your answer Sir Thank you very much for your video Man is very usful

Hi Martin, I want to thank you much about this video, also I have a question about how to plot residuals real time during running the simulation if you could help me. Thanks in advance!

very helpful and informative.. please try to include interactive text or subtitles for better understanding

This seems like adaptive meshing! How can we do it for 3D geometries? Thanks in advance

when you say "ramp up the total number of iterations or do some other modifications" what exactly other modifications are you talking about?????

hi +Martin, thanks for the video. It works fine for me.

HELLO.. Thanks for this tutorial! please can you tell how I can change the color of paraview background?

Hi, I am getting an error saying Createtime