I didn't knew freeCAD is capable of doing such analysis! Thanks for sharing. One suggestion from me: You shouldn't use pressure BC on inlet and outlet at the same time. It is much better to use mass flow at inlet and pressure outlet. Especially if You are running inviscid flow.
Thank you very very very much. What to say, whatever workflow for CFD I was looking for including installing necessary software, you generously presented to everybody in 2 videos. Absolutely amazing. I am sure that everybody greatly appreciate your efforts and expertise.
Hello. Thank you for this tutorial. It's really clear and easy to understand. I've tried to reproduce same actions you are doing. I'm facing an issue, that pressure resudials are not dropping below 10^(-2) with meshing 25 mm (nor with 20 or 5 mm). I'm running OS: Ubuntu 18.04.6 LTS (ubuntu:GNOME/ubuntu) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.19.24366 (Git) AppImage Build type: Release Branch: (HEAD detached at 0f9259c) Hash: 0f9259cda103ae1824ac16c68ac9b4a0d54b05fc Python version: 3.9.7 Qt version: 5.12.9 Coin version: 4.0.0 OCC version: 7.5.3 Locale: Russian/Russia (ru_RU) with openfoam2106 Do you have any ideas what can cause such behaviour and how can I overcome this issue?
The problem could be all sorts of things. Try changing the mesh for different settings and simplify the geometry if it has any complex parts. Boundary conditions might play a role as well. Good Luck
hi, tysm for the videos, you are a great source for learning freecad. Can you please make a video for more detailed FEM, like, details of messhing, materials solvers and etc ? especially their advantages. also two very interesting corners that i am eager to learn, is there a optimization on FEM ? even not 100 percent automatic will be amazing. like coding to change some paramaerters gradually, so we can compare the results by ourselve afterward. the last one is impact or collisions or two part, not only one moving part colliding with other moving or stationary part, but two stationary parts, which at least one of them will be deformed due to a force and then reaches to the second part. i know multibody isn't covered by feecad, which is a shame, but i was hoping that you can suggest a way aroung it.
well, im stuck. i can do very basic CFD, but now i want to do a cfd of my small 650mm wind turbine blade i made. I can not figure out the inlet and outlet surface on my blade haha. My main goal is to have air hit(flow) into the top surface of my blade at a particular speed, then measure the force in newtons of that wind speed. But i do not even know where to begin haha
You can do an external flow analysis like in this video here: th-cam.com/video/JVO2kqO3D1Q/w-d-xo.html You also, on some platforms, set things to spin. I'm not sure if you can do it in FreeCAD, you might be able to in Salome Mecca.
Tried the CAELinux LiveCD. Has old version of FreeCAD not able to read from AddOns directory for auto install of plugins. I will update on how i did this on an Ubuntu 20.04 LTS LiveUSB when finished in a comment here.
I follow this tutorial many time but i just cant make the graph or the analysis control working. The error come out "mpiexec detected that one or more processes exited with non-zero status"
I have never seen that error before and I'm unable to replicate it. I found this information which may be related to the computer username www.cfd-online.com/Forums/openfoam-solving/225209-mpirun-detected-one-more-processes-exited-remotely-accessed.html Good luck
@@JokoEngineeringhelp owh ok, tq for share the link... I don't think it is because my username because. It work yesterday. But now it doesn't. I don't know what I did wrong
Hello. How did you setup openfoam to work with FreeCAD. I am running OpenFoam with docker but I don't know how to select installation path in preferences for all three, openfoam, paraview, and gmesh. What was your method?
I started with CAELinux so I didn't have to do those installs. See this video and follow the next videos from the description th-cam.com/video/eL-YBpC4p6I/w-d-xo.html
MPI stands for message parsing interface which used for parallel calculation in CFD. From your error, it appears that you haven't installed MPI in your PC. If you're using Ubuntu then you should be able to find complete tutorial on how to install MPI in your PC. Google is your friend at this point. Good luck.
hi there , Im getting this error code "0.5: Fatal error: Unable to find mesh in directory ../meshCase 0.5: Simulation exited with error" ..any hints hahhaha!!!
I had that error before. I installed with a different method and it fixed the error. I had it come up a long time ago on either the appimage or a flatpak installation I was running so I opened the file in the CAElinux pre-installed version of FreeCAD, updated and ran it and I didn't get that error.
Hi, thank you for making interesting videos! I learn a lot from your videos. I did watch you videos on running fluid simulation for external flow from STL file. I am wondering is it possible to simulate internal flow from a hollow STL file?
I didn't knew freeCAD is capable of doing such analysis! Thanks for sharing.
One suggestion from me: You shouldn't use pressure BC on inlet and outlet at the same time. It is much better to use mass flow at inlet and pressure outlet. Especially if You are running inviscid flow.
Thank you for so much great content. This was really cool. The open-source software just gets better every day.
Thank you very very very much. What to say, whatever workflow for CFD I was looking for including installing necessary software, you generously presented to everybody in 2 videos. Absolutely amazing. I am sure that everybody greatly appreciate your efforts and expertise.
Thank you! I'm so glad it was helpful.
Great walkthrough of the process 👍
Thanks for sharing your experience with all of us 👍😀
I really Ike your music and your subtle humor in your videos. Keep up the good work!
Your videos are always very interesting and useful, thanks!
Thank you, This is what i'm waiting for😎.
Good job.
Great video 👍
Very comprehensive, thanks to share
Thank you. Your work is awesom.
Would probably never use theese functions but very interesting anyhow! Thanks!
Very Cool..!! Thank You for sharing .. Cheers :)
First time I saw your face I thought you were Ryan from Destination Linux, last video in the interview my doubts were scratched.
Hello.
Thank you for this tutorial. It's really clear and easy to understand.
I've tried to reproduce same actions you are doing. I'm facing an issue, that pressure resudials are not dropping below 10^(-2) with meshing 25 mm (nor with 20 or 5 mm).
I'm running
OS: Ubuntu 18.04.6 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24366 (Git) AppImage
Build type: Release
Branch: (HEAD detached at 0f9259c)
Hash: 0f9259cda103ae1824ac16c68ac9b4a0d54b05fc
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: Russian/Russia (ru_RU)
with
openfoam2106
Do you have any ideas what can cause such behaviour and how can I overcome this issue?
The problem could be all sorts of things. Try changing the mesh for different settings and simplify the geometry if it has any complex parts. Boundary conditions might play a role as well. Good Luck
Cool tutorial, well done, thanks :)
sooo sooo cool!! however, I can't get pass the meshing. It's just driving me crazy!!!
Meshing is a challenge. Play with all the parameters you can, simplify any unnecessary features and remove from the model may help.
hi,
tysm for the videos, you are a great source for learning freecad.
Can you please make a video for more detailed FEM, like, details of messhing, materials solvers and etc ?
especially their advantages.
also two very interesting corners that i am eager to learn, is there a optimization on FEM ?
even not 100 percent automatic will be amazing.
like coding to change some paramaerters gradually, so we can compare the results by ourselve afterward.
the last one is impact or collisions or two part, not only one moving part colliding with other moving or stationary part, but two stationary parts, which at least one of them will be deformed due to a force and then reaches to the second part.
i know multibody isn't covered by feecad, which is a shame, but i was hoping that you can suggest a way aroung it.
Thank you for this it was very helpful, can you do a basic wind tunnel analysis with a basic shape like a sphere for example?
I am preparing content on external flow. I will be a little while until I have it
Great Video! Can you use the same workflow to simulate a wind tunnel simulation, which is wind pressure acting upon surfaces of a structure?
I am preparing some content on external flow, it will take a while before I can get it on here
@@JokoEngineeringhelp we are willing to wait for your quality content. Thanks!!
@@xelonix_ You are very kind, thank you
this is 200% easier than openfoam alone
Wow😲😲thanks
well, im stuck. i can do very basic CFD, but now i want to do a cfd of my small 650mm wind turbine blade i made. I can not figure out the inlet and outlet surface on my blade haha.
My main goal is to have air hit(flow) into the top surface of my blade at a particular speed, then measure the force in newtons of that wind speed. But i do not even know where to begin haha
You can do an external flow analysis like in this video here:
th-cam.com/video/JVO2kqO3D1Q/w-d-xo.html
You also, on some platforms, set things to spin. I'm not sure if you can do it in FreeCAD, you might be able to in Salome Mecca.
@@JokoEngineeringhelp thanks for the link. I will watch it soon
Tried the CAELinux LiveCD. Has old version of FreeCAD not able to read from AddOns directory for auto install of plugins. I will update on how i did this on an Ubuntu 20.04 LTS LiveUSB when finished in a comment here.
That "Point Cloud" thing in ParaView does absolutely nothing for me 🤔🤔
Please let me know if this software contains a human body voxel or if I can create one for a simulation of an implantable antenna.
But how to test a real body in wind
Hello my friend, I am doing the same as in the video, but there is no movement in the output part. Can you help me?
What movement are you expecting?
I follow this tutorial many time but i just cant make the graph or the analysis control working. The error come out "mpiexec detected that one or more processes exited with non-zero status"
I have never seen that error before and I'm unable to replicate it. I found this information which may be related to the computer username
www.cfd-online.com/Forums/openfoam-solving/225209-mpirun-detected-one-more-processes-exited-remotely-accessed.html
Good luck
@@JokoEngineeringhelp you mean "/C" path storage?
@@JokoEngineeringhelp owh ok, tq for share the link... I don't think it is because my username because. It work yesterday. But now it doesn't. I don't know what I did wrong
Hello. How did you setup openfoam to work with FreeCAD. I am running OpenFoam with docker but I don't know how to select installation path in preferences for all three, openfoam, paraview, and gmesh. What was your method?
I started with CAELinux so I didn't have to do those installs. See this video and follow the next videos from the description
th-cam.com/video/eL-YBpC4p6I/w-d-xo.html
@@JokoEngineeringhelp I ended up dual booting CAELinux. Thanks it is much easier
I get this in the report box when I solve
./Allrun: line 9: mpiexec: command not found
I have never seen that error before. The forum might be able to help
MPI stands for message parsing interface which used for parallel calculation in CFD. From your error, it appears that you haven't installed MPI in your PC. If you're using Ubuntu then you should be able to find complete tutorial on how to install MPI in your PC. Google is your friend at this point. Good luck.
hi there , Im getting this error code "0.5: Fatal error: Unable to find mesh in directory ../meshCase
0.5: Simulation exited with error" ..any hints hahhaha!!!
I had that error before. I installed with a different method and it fixed the error. I had it come up a long time ago on either the appimage or a flatpak installation I was running so I opened the file in the CAElinux pre-installed version of FreeCAD, updated and ran it and I didn't get that error.
Can i get the softwere freecad?
www.freecadweb.org/downloads.php
Hi, thank you for making interesting videos! I learn a lot from your videos. I did watch you videos on running fluid simulation for external flow from STL file. I am wondering is it possible to simulate internal flow from a hollow STL file?