Freecad CfdOF Tutorial #1: getting started
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- เผยแพร่เมื่อ 27 มิ.ย. 2024
- First steps in Freecad CfdOF: This tutorial shows you how to install the CfdOF workbench, how to build up a model and how to postprocess the simulation. This tutorial gives you the basics of Freecad CfdOF. In the following tutorials, I will show more sophisticated simulations.
0:00 Introduction
1:41 Installation
5:41 Setup of the model with the part design work bench
8:05 Setup of the CFD-Simulation
14:34 Solver
16:42 Review with Paraview - วิทยาศาสตร์และเทคโนโลยี
Thank you very very much Bernd, I was having very hard time to understand what I am suppose to do. With this video from you I started understanding at least some of the steps between FreeCAD and Paraview.
Thanks!! This workbench is pure gold
Many thanks for this incredible content. Clear and concise.
Thank you for the tutorial. This has helped me a lot
Hallo Bernd, vielen Dank für dieses klasse Video! Werde gleich den nächsten Teil anschauen.
Mein Kompliment an den Autor dieses Videos. Er ist ein Überflieger. Ich möchte ihm ein Getränk ausgeben. Ich habe jahrelang versucht, OpenFOAM zu verwenden und hatte bis heute keinen Erfolg. Ich bin sehr glücklich.
Ich spreche nicht sehr fließend Deutsch. Deutsch ist nicht meine zweite Sprache.
Many thanks Tech Bernd. A very helpful tutorial: I even watched it twice.😃
Twice? I have watched this video more than 20 times
At least in my case, the parallel computing option must be set to *False*
this was great help
Thanks for sharing this video, i saw on the screen some that it can help me install Freecad with OF successfully this time, in other times It wasn't successfully installed.
danke, sehr gute infos, beginne gerade mich in simulationen einzuarbeiten
Wunderbar. Ich liebe diesen TH-cam-Kanal
danke, sehr hilfreich
Awesome Bernd! Thanks for the review. How good is CfdOF!
Excellent youtube tutorial, Bravo, very appreciate it if you could demonstrate wind flow across the building
Thank you for your positive feedback. The flow across a building is similar to the flow around a car. You a video about the flow around a car in tutorial #6: th-cam.com/video/KWbUaiE9SBc/w-d-xo.html
In the freecad-forum, you will please find an example for the flow around a CAARC-standard-building: forum.freecad.org/viewtopic.php?f=37&t=68164&sid=20997e127a6d4d3afa7a6a15ae95908b
Sir, in 2:51 I didn't see OpenFoam install directory and paraview executable path automatically. In my case, they are blank and I don't know which file I should use. Do you have any suggestions?
Thanks for the tutorial!
Sir, thank you very much for your question. May I kindly ask you to post your question in the FreeCad-Forum (forum.freecad.org/viewforum.php?f=37)? In the FreeCad-Forum, you will find more experts who can answer your question. When posting your question, please also write your OS (Windows 10, Windows 11, Linux, ...) and the FreeCad-Version and the CfdOf-Version you are currently using.
Please notice that my tutorial is 1 year old, in this video, I am describing the installation of the blueCFD-package. Meanwhile, the installation of the MinGW package became possible. The installation of the MinGW package is similar to the installation of the blueCFD-package, but there are some slight differences. For this reason, please post in the FreeCad-forum if you tried to install the blueCFD-package or the MinGW package.
Hello, thank you for the video. How do i check courant numbers?
Hi Bernd, is symmetry constraint like a wall? Why didn't we use wall, non slip instead of symmetry constraint? Thanks.
Hi shuvashishroy6006, a constraint like a wall would also be feasible. Please mind that this tutorial is about starting FreeCad CfdOf, so I made the most simple calculation possible.
Constraints / boundary conditions can be interpreted physically or mathematically. A wall with no slip for examples defines mathematically the speed (= zero) and the pressure. A symmetric boundary condition defines the symmetry of this object, means, that anything that happens in the left half is identical with the right half.
I chose a symmetric boundary condition because for postprocessing, you can interpret anything you see as a slide through this system. If you take a look on my tutorial about cars (th-cam.com/video/KWbUaiE9SBc/w-d-xo.html), you will understand how a symmetric boundary condition works. A symmetric boundary conditions has advantages in postprocessing (= similar to a slide through an object) and advantages in calculation time (= half of the calculation time)
@@techbernd5535 Thank you so much for the awesome explanation!
@@shuvashishroy6006 Thanks to both of you. I am learning a lot.
Great introduction. Unfortunately tried importing a file that was originally done in Rhino into FreeCAD and could not get the CFD to work. If I have a native Rhino file what is the best format to export it in so that it can be read correctly in FreeCAD?
Please ask questions like these in the FreeCad-Forum: forum.freecad.org/viewforum.php?f=37
Is there a reason face7 isn’t constrained (eg. also as a wall)? Is does the symmetry on face8 mean that the opposite face doesn’t need to constrained? Thanks for this tutorial series, I think they will help a lot 👍
@rhodriwilliams2891: You are right, face 7 is not constrained. That was a mistake that happened to me during the recording. Normally, this surface should also be constrained.
@@techbernd5535 I’m assuming as a no-slip wall? Thanks for the prompt reply 👏
@@rhodriwilliams2891 Yes, a no-slip wall.
@@techbernd5535
Is there a tutorial to install *cfdof* in FreeCAD on Linux ?
OpenFOAM and Paraview are already installed on my Ubuntu 20.04 computer but I have not been able to make *cfdof* run in FreeCAD.
Stream Tracer didn't work for some reason but everything else worked perfectly! Thank you for the awesome video!
could you do a video of this smae process but with a small wind turbine blade?
that would be very helpful becasue i do not know what counts as inlet and outlet
If you need information, please write your request clearly and in detail. In any case, it is better to make this request in the FreeCad forum than here. And please don't use abbreviations. The abbreviation "smae" doesn't mean anything to me, so I can't answer your question. I have recorded 15 tutorials about FreeCad CfdOf, isn't there a tutorial that will help you with your question? You always have to understand the basics first, so my first tutorials will help you before you can tackle more complicated questions.
@@techbernd5535 oh, the word smae was a typo of the word "same" haha. Thats my phones fault.
To answer your question "inst there a tutorial that can help you with your question?"
There is not, hence why i was asking :)
I will start on the freecad forums and go from there.
Thank you :)
@@techbernd5535 Here is a request. How to do CFD on a 2d object. IE maybe wind blowing onto a flat plate. Show how to set that up and solve for the force of the wind blowing onto the flat plate. I think that would be a very informative video.
thank you: )
@@LT72884 These types of simulations are sufficiently explained in my tutorials. I don't see any reason to record a new tutorial. If you lack the specialist knowledge for Cfd or FreeCad CfdOf, you can get professional help here: forum.freecad.org/viewforum.php?f=31
@@techbernd5535 ill look again through your tutorials to see if i can find one that is a fluid pushing into a plate.
Thanks
Hi I got error Meshing exited with error at 11:56
Could you please ask your question in the CfdOf-subforum of the FreeCad-Forum? You will find the subforum here: forum.freecad.org/viewforum.php?f=37. In the FreeCad-Forum, you will find many experts who can help you.
Which freecad version are you using? Use version 20.2, do not use 21.
1.3: Meshing exited with error
did u solved it? i got same problem too
no, i want to know how to fix that@@JadeConsult
Which freecad version are you using? Use version 20.2, do not use 21.