Hi @czhang!
You can either use the Split operation in the Mesh Creator tab or if you are working with OnShape use their Split option explained here: Split
Cheers,
Jousef
Hi @czhang!
You can either use the Split operation in the Mesh Creator tab or if you are working with OnShape use their Split option explained here: Split
Cheers,
Jousef
Thank you very much!
Hi @jousefm !
i started my mesh operation and got an error, so i started a new operation with the exact setting, wich i got above.
now i have the same error again and cant start the mesh operation.
Sorry for the late response @rizzo!
Do you want to share the project with me or did you already solve the issue by yourself?
Best,
Jousef
Lingering Question…
From the first session, my results showed the pressure forces on the two designs to be essentially equal. Since I didn’t expect that, I thought I must have used the same wing model, so I carefully re-ran the mesh and model getting essentially the same results.
My questions are:
Standard Px Pz Py
Flap 25.55 -25.80
Wing 9.00 -94.25 -8.15
High Down Force
Flap 25.57 -25.85
Wing 9.02 -94.16 -8.14
Original run: https://www.simscale.com/workbench?publiclink=4ee6ed90-70df-4b1a-aee3-c57ecf51de70
Second run: https://www.simscale.com/workbench?publiclink=24332b99-6fdc-4278-8e2a-eea267dee93f
i know the similarity may be academic at this point, but it still makes me wonder why. Can anyone explain it?
Thanks,
Don
Hi @dond,
Thank you for the question, I’ll answer as best as I can.
Thank you for the excellent and detailed response.
I forgot that the wing and flap are treated separately.
Again, thanks
Don
Hi,
I have problem running the simulation. It said “Finished” but also “Error”. It gave me an incorrect graph for Convergence plots. I would appreciate if anyone can take a look that that.
Thanks,
Here is the link to my workbench.
Hi @chaunguyen!
I ran the simulation with increased number of CPUs as well as an increased runtime. Convergence plot looks “good” now. Shared the finished simulation run with you.
Best!
Jousef
Hello,
I am facing problems while simulating for the tutorial 2. I have tried multiple times but simulations always ended up with the same error. I havent used the porous media & rotating zones because i am unable to create close surfaces required to create volume. I have tried to open the same tutorial model in Catia but it shows unsupported. I have also tried to open in Onshape but it was not successful, error was translation failed.
My project link:
Any suggestion to get rid of simulation error, merging surfaces for the STL file will be much appreciated.
Thank you so much in advance.
Regards,
Kartik
Hi Kartik!
The problem is that you have still some bad cells inside of your mesh, make sure that the structures called “Barre” are meshed with an increased refinement and then look at the meshing log if you could reduce the number of erroneous cells.
Best,
Jousef
Hi Jousefm,
Thank you so much for your quick reply. I will try it today and update it for the same.
Regards,
Kartik
I just have a quick question with regards to Exercise #2: Full Car Analysis in the Applications of CFD in Formula Student & Formula SAE course. I’ve currently spent a while trying to mesh the car, but unfortunately, I am constantly met with an error in the event log detailing an error with a cell zone. After doing some research and looking through the forums trying to rectify this issue, I realised that the cell zones can only be created using volumes, but “MRF_F”, “MRF_R” and “Radiator” are all deemed faces in the model and when trying to select volumes, the entire model “solid_0” is only selected. I have tried altering the model in Exercise 2 using SolidWorks and noticed that the model was seen as one entire solid rather than sub-elements, which is reflected in the STL file, as the 2.5 million lines were encased between the one volume. I decided to try using the Exercise 3- full model and noticed that the model was also treated as a single volume. I downloaded it and noticed that the STL file is separated into the various sections. I disassembled the STL file and followed the 2 processes in STL file compilation found in the Exercise 4 pdf. Unfortunately, when loading the newly altered STL file into the exercise, ensuring the MRF zones and radiator are volume entities, they still appear to register as faces. I’ve tried resolving this by also following the various forums which have alluded to the same thing, but haven’t been able to fix the issue. Do you have any suggestions, as I’ve tried converting the MRF sections to volumes in order to create the cell zones, but have had no success, even though I have
tried altering the model and STL files?
I’d greatly appreciate any suggestions!
Thanks in advance!
Hey @gdonegan,
There was a change in how porous zones are selected (only volumes are allowed now). Please take a look at this detailed discussion. By the time this workshop went live, face selection was possible but not anymore.
/Ric
Hey, i am stuck here with this problem - “A cell zone has been defined with assignments of faces. This is not supported. Please create a closed solid region that exactly represents your cell zone in your CAD tool.”
Have tried selecting the volume tool first but it does not fix the problem. Can you please suggest me what to do?
Thanks
Hey,
Cell zones have to be a volume (separate to the flow region). Make sure to have a look at this tutorial, that makes use of a MRF rotating zone: Fluid Flow Through Centrifugal Pump | Tutorial | Simscale
Figure 22 is of special interest:
If you’re still having issues, make sure to post your project link so we can have a look!
Hello Ricardo,
Thanks for the support to the user ‘bbari’, I am facing exactly the same issue he had faced, I can understand that MRF and the Porous Medium should be in Seperate Volumes and not as a Surface, but I am not sure how to ungroup the MRF’s and Radiator from the Solid assembly.
Can you please help me with this, below is the link of my project
https://www.simscale.com/workbench/?pid=5522997268464954680&mi=spec%3A728bc4ab-1050-49cb-9f51-4ec40120f0ff%2Cservice%3AMESHING%2Cstrategy%3A1117&sh=1116
Hey there!
Please have a look at this topic for more insights. But long story short, the model has some faulty surfaces, which are making it get flagged as a sheet body. Once the faulty parts are fixed and everything is a solid, you should be good to go!
Check this simplified model to see the difference: https://www.simscale.com/workbench/?pid=1295674389835736516&mi=geometry%3A1&mt=GEOMETRY
Great tutorial, can you please also do structural analysis of space frame chassis ? for formula Student a humble request .
Sounds like a great idea Thomas! Do you have any example in terms of CAD so we might give that a spin soon
Cheers!
Jousef