Wow, it's an honor to have one of the developers here. Being on the mechanical side, sometimes the development side feels a bit like magic. Thanks for making your efforts so accessible and making these tools as great as they are.
Great video. At 20:00 or so you could have made the airplane more visible by decreasing the opacity of the streamlines. This the best/easiest/clearest way of meshing for OpenFOAM that I've found. Good work !
Joko I suggest making FreeCAD videos explaining the Assembly 3 Workbench. As a former Solidworks user I think this workbench is intuitive and in my opinion it should be the main Assembly workbench
This Floating point exception error should disappear without the need to remesh with different size if you just switch initialization from potential flow to specify values (you can leave the default zeros there).
I Liked your simulation video , Joe . great work . If you could do a comparison video on the assembly work benches . Perhaps advantages and disadvantages of each one and maybe with examples ?? I know that may be a lot of work , but please consider . Thank You Merry Christmas to you and yours and a great new year to all . Kindest Regards Terry Lembke
Trust me that the CfdOF module in FreeCAD is the most intuitive open-source CFD software. Pretty much everything else (including OpenFOAM itself) requires digging deep in input files and programming languages.
With Paraview you can use less points (I saw 1000) and downscale the point cloud. Or use a line rather than a sphere for the stream lines. Also turn on the plane geometry. Can you do a demonstration with an external flow on a building? If you can generate a CFD flow with atmospheric boundary layer profile (decreasing velocity from the top height to bottom) it would be awesome.
awesome video. Thank you for recommending it to me. I do have a question. I am new to CFD. I understand the math very well, but what i am trying to understand is why the negative cut of the plane? why not just leave the plane as a solid? or does freecad not like overlapping geometry? How does having a empty shell vs solid part calculate flow? And why do we need a wall? whats its purpose? EDIT: i figured out why we need walls. I didnt catch what you said, but htis box is a "virtual wind tunnel" so no walls would be an issue. thanks
I'm not a career analyst, so my answer probably isn't the best. Making a negative of the plane establishes the area/boundary that flow will occur in, and allows you to define where the flow starts, ends, what acts as a wall, etc. Great to hear from you, Best!
Is it possible to do wind induced rotation simulation in this software? Like for example to determine wind turbine rotation speed under the influence of wind and rotor power?
I could not get anything working with Simscale but have been able to sucessfully get some results using Openfoam workbench for FreeCAD on a laptop with only four cores and 8GB of memory. Workflow seems more streamlined for CFDOF plugin.
Possibly. I have a series on setting up FreeCAD for CFD. It requires add ins for some things. This is the first video in the series: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-eL-YBpC4p6I.html
The video I was really looking forward to. Thanks! The streamline results are in MPa or in terms or m/s? Also, it would be best if we have a good Paraview tutorial.
Love the video so far, using it for a school project, but a quick question, I made an aircraft in Open-VSP and exported it as an STL, I followed the instructions and couldn't get past the cutting/halving of the plane. It gives me the error "Recompute failed!". if you have any idea on how to fix this it would be greatly appreciated.
I can't seem to find anything visible that would cause it to be zero thickness, I downloaded your model so I could see how it went but I got another error when computing the mesh in cfdOF, saying that the installation path hasn't been set and couldn't be found.
@@Nebb1e This is a common thing in the world of analysis. Change meshing parameters and mesh types might help. Even consider changing the shape if you need to. Sharp edges and/or unusual angles, unusually small features may all be causes.
Yes if I understand your question. View>toggle orthographic or perspective rendering. Not distorting the model for perspective viewing is the standard in every platform I've used, because when modeling it is quite important to have correct, nonscaled features for relations and constraints on external geometry.
@@JokoEngineeringhelp That is what the ortho views are for (top, left, right, back, etc.) Heck make any ortho view ya want with a working plane. My brain struggles to figure out which way the model is orientated with ortho perspective especially in wire frame, no problem at all in normal perspective plus i get to see what the model really looks like especially if we can adjust focal (lens) length
It would be extremely difficult to simulate in OpenFOAM, let alone CfdOF. You would likely need FSI and thus coupling with a structural solver (like CalculiX) for this. Even then I'm not sure if contact would work.
really interesting! if i wanted to simulate a car including wheel rotation, what should i do? can you make a tutorial like this for this topic too? thank you very much, very clear video
There wouldn't be a simulation of a combustion itself, you could simulate multiple materials and the flow as they mix and you could do another analysis of what the max possible combustion pressures would be on your components. I haven't heard of FEA that has this capability, but Ansys might since it's so advanced and heavily used in aerospace. Likewise Cyprien Rusu has some good material on FEA, he might have a guide for it on an open source free platform like Salome. feaforall.com
Joko I suggest making FreeCAD videos explaining the Assembly 3 Workbench. As a former Solidworks user I think this workbench is intuitive and in my opinion it should be the main Assembly workbench
