[MVRC] Mantium Virtual Racecar Challenge 2025 (Grand Prix Cars)

[Coventry]

Hey, I’m currently trying to get my feet wet with mantiumflow before jumping into this challenge, I’m stuck at building a case. The loading geometry panel gets to 95% and then doesn’t move from there, I left it over night but no progress. I’m just trying to run the car tutorial off the site, I’ve tried building on both the competition and demo versions of mflow but get the same result with both. Does any one know where I might be going wrong?

[janci_kp]

Hi guys,
my friend just told me about this competition and I would love to share my 2026 car that I have been developing since the new year. Here is the pressure distribution and you can find many more details on my X page
https://x.com/jancikapral
https://imgur.com/a/hv4P6w1

Looks like you've been busy. You should enter! I suspect you'd need to develop a new car to meet the mvrc rules, particularly about surface thickness but the more the merrier!

But you aren’t working on 26 cars right now right? I would love to enter this competition for 26. But I have a few questions. Do you have CFD for free and is it computing locally or on cloud? Do you design model in specified CAD or is it free choice?

[CAEdevice]

Hi guys,
my friend just told me about this competition and I would love to share my 2026 car that I have been developing since the new year. Here is the pressure distribution and you can find many more details on my X page
https://x.com/jancikapral
https://imgur.com/a/hv4P6w1

Looks like you've been busy. You should enter! I suspect you'd need to develop a new car to meet the mvrc rules, particularly about surface thickness but the more the merrier!

But you aren’t working on 26 cars right now right? I would love to enter this competition for 26. But I have a few questions. Do you have CFD for free and is it computing locally or on cloud? Do you design model in specified CAD or is it free choice?

Hi, the CFD solver is OpenFOAM, the pre/post processing is done with a free version of MantiumFLOW (https://mantiumflow.com/). The official CAD format for the car submission is STL, in case the staff decided to change it would be STEP (with standardized STL conversion) so you can use any CAD software to produce your models.

[spacehead3]

But you aren’t working on 26 cars right now right?

Yes, MVRC2025 is using the 2026 F1 regulations. We try to stay 1 year ahead of the real cars. https://mantiumchallenge.com/ has everything you need to get started.

[k.ko100v]

Can't resist a little teaser. First run is in the books.

https://i.imgur.com/gJ9CoJP.png

+1 from my side. Still far away from the first run.

[The Rusted One]

Hey, I’m currently trying to get my feet wet with mantiumflow before jumping into this challenge, I’m stuck at building a case. The loading geometry panel gets to 95% and then doesn’t move from there, I left it over night but no progress. I’m just trying to run the car tutorial off the site, I’ve tried building on both the competition and demo versions of mflow but get the same result with both. Does any one know where I might be going wrong?

99% likely not the solution but make sure all the file names don't have dashes "-", which is actually in all of the mandatory parts when I downloaded it.
common mistake

[LVDH]

Hey, I’m currently trying to get my feet wet with mantiumflow before jumping into this challenge, I’m stuck at building a case. The loading geometry panel gets to 95% and then doesn’t move from there, I left it over night but no progress. I’m just trying to run the car tutorial off the site, I’ve tried building on both the competition and demo versions of mflow but get the same result with both. Does any one know where I might be going wrong?

99% likely not the solution but make sure all the file names don't have dashes "-", which is actually in all of the mandatory parts when I downloaded it.
common mistake

When looking at the new mandatory parts, I did wonder why we switched from underscores to dashes, but did not think much about it. MFlow probably complains, because OpenFOAM later does not like this at some step.
I will try to fix the mandatory parts, including the wheel position situation today. When MFlow is ready, is still a bit unclear to me. If you guys are happy to live without streamlines when using OFv12, I could release a version today. But I should be close to solving this issue.

[LVDH]

So, there are some minor modifications that need to get done in our mandatory parts. We will have to wait a bit. I also looked into MFlow and yes, it does complain about dashes in the file names, So next stl/step export, I will have that fixed. This is only a warning though. I noticed that it can get stuck at 95% when creating the case. This is a funny issue though. Especially Windows users will know how hard it is to make a good progress bar. I did my best and think compared to other software, I am not too bad. However, it seems like it can appear to be stuck at 95% when you are wring some pretty large stl files. If you just wait, it should work and create the case.

[LVDH]

I have updated the supplied CAD files and slightly updated the rules.

[yinlad]

I have updated the supplied CAD files and slightly updated the rules.

Thanks for the hard work. Looking forward to getting started in earnest. Could you clarify if the regulations are final at this stage? If we will take on Appendix 2 from the proposed regulations or use the inlet as per last year.

I just worry that with no mandatory plenum and no requirement to model one to deliver air to the engine inlet surface, engine covers could quickly stray from a 'reasonable' shape/function

[LVDH]

There is an issue with the new CAD files. Please do not use them and wait for the fix.

There rules are more or less final. I would have expected much more backlash and comments from you guys, but if you are happy then we are pretty much done.

The air inlet will be pretty much like last year. I did not really see the point of you guys designing an internal duct as they would very quickly all look perform the same. There was a potential loophole to exploit, though. And I did not see an easy way to enforce a rule to avoid this.

[CAEdevice]

I have updated the supplied CAD files and slightly updated the rules.

Thanks for the hard work. Looking forward to getting started in earnest. Could you clarify if the regulations are final at this stage? If we will take on Appendix 2 from the proposed regulations or use the inlet as per last year.

I just worry that with no mandatory plenum and no requirement to model one to deliver air to the engine inlet surface, engine covers could quickly stray from a 'reasonable' shape/function

This is my interpretation of the rules about the engine inlet.

To avoid confusion, I would add to the rules: all the air that feeds the engine must come from a flow through the inlet of the airscope (which by regulation is located all above the helmet).

[yinlad]

I have updated the supplied CAD files and slightly updated the rules.

Thanks for the hard work. Looking forward to getting started in earnest. Could you clarify if the regulations are final at this stage? If we will take on Appendix 2 from the proposed regulations or use the inlet as per last year.

I just worry that with no mandatory plenum and no requirement to model one to deliver air to the engine inlet surface, engine covers could quickly stray from a 'reasonable' shape/function

This is my interpretation of the rules about the engine inlet.

To avoid confusion, I would add to the rules: all the air that feeds the engine must come from a flow through the inlet of the airscope (which by regulation is located all above the helmet).

https://www.caedevice.net/SERVER/MVRC/2 ... urface.png

This is what I understood but it seems Andre does not want to use this implementation.