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

[yinlad]

So, if you guys can confirm to me, you can get the graphical stuff working as well, you can use the MFlow Linux version in WSL2. Then MFlow for Windows is dead, which will open up much more development time for MFlow for useful features. Windows compatibility really eats a lot of my time.

Regarding the radius rule, we are getting there. It will be for race 2 though.

Just to get back to you on this, I have managed to open MFlow via WSL2. I've yet to run a case but I'll give it a go and let you know how I get on.

EDIT: Nevemind, I run into the same issue Ash has, where I open a case folder but it doesn't actually load.

[Ft5fTL]

So, if you guys can confirm to me, you can get the graphical stuff working as well, you can use the MFlow Linux version in WSL2. Then MFlow for Windows is dead, which will open up much more development time for MFlow for useful features. Windows compatibility really eats a lot of my time.

Regarding the radius rule, we are getting there. It will be for race 2 though.

Just to get back to you on this, I have managed to open MFlow via WSL2. I've yet to run a case but I'll give it a go and let you know how I get on.

EDIT: Nevemind, I run into the same issue Ash has, where I open a case folder but it doesn't actually load.

I had the same issue. Turns out the config file was pointing the wrong of path, fixing that and changing the stl files to binary fixed my issue on linux mint.

[LVDH]

Good work, I am trying to fix Ash's issue on the official support "forum", which is pretty broken, so no fun for either of us. I kind of think that he also does not have the correct path to OpenFOAM. The issue is kind of strange though. But there is a good likelihood that this, together with fact that I changed how MFlow finds the OF installation, is the combination that causes the issue. So, by providing the correct path, you have a good chance of solving the issue.
And to make matter worse, the new "intelligent" way of finding your local OF might even have a second bug. It only affects Linux users, though. Right now, it seems to me that "~/blabla/OF_location" does not work as if you would do /home/your_user_name/blabla/OF_location".

[The Rusted One]

Hi all,
I'm having this issue with the frt suspension where my fairings aren’t aligning with the MAND suspension arms when the ride height is adjusted… everything is in the correct folder afaik so it’s a bit of a weird issue and I can’t find the problem causing it

[yinlad]

Good work, I am trying to fix Ash's issue on the official support "forum", which is pretty broken, so no fun for either of us. I kind of think that he also does not have the correct path to OpenFOAM. The issue is kind of strange though. But there is a good likelihood that this, together with fact that I changed how MFlow finds the OF installation, is the combination that causes the issue. So, by providing the correct path, you have a good chance of solving the issue.
And to make matter worse, the new "intelligent" way of finding your local OF might even have a second bug. It only affects Linux users, though. Right now, it seems to me that "~/blabla/OF_location" does not work as if you would do /home/your_user_name/blabla/OF_location".

Quick update, changing the mflow config to use 'local_OF_location=/usr/lib/openfoam/' has got the case displaying now. (Yet to run a case, but one step at a time )

EDIT: Getting the following when I try to run a case

blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by blockMesh)
blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by /usr/lib/openfoam/openfoam2412/platforms/linux64GccDPInt32Opt/lib/libblockMesh.so)

[Ft5fTL]

Good work, I am trying to fix Ash's issue on the official support "forum", which is pretty broken, so no fun for either of us. I kind of think that he also does not have the correct path to OpenFOAM. The issue is kind of strange though. But there is a good likelihood that this, together with fact that I changed how MFlow finds the OF installation, is the combination that causes the issue. So, by providing the correct path, you have a good chance of solving the issue.
And to make matter worse, the new "intelligent" way of finding your local OF might even have a second bug. It only affects Linux users, though. Right now, it seems to me that "~/blabla/OF_location" does not work as if you would do /home/your_user_name/blabla/OF_location".

Quick update, changing the mflow config to use 'local_OF_location=/usr/lib/openfoam/' has got the case displaying now. (Yet to run a case, but one step at a time )

EDIT: Getting the following when I try to run a case

blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by blockMesh)
blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by /usr/lib/openfoam/openfoam2412/platforms/linux64GccDPInt32Opt/lib/libblockMesh.so)

run the runCase.sh file on terminal after creating the case.

[LVDH]

EDIT: Getting the following when I try to run a case

blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by blockMesh)
blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by /usr/lib/openfoam/openfoam2412/platforms/linux64GccDPInt32Opt/lib/libblockMesh.so)

This sounds very much like an OpenFOAM specific issue (for once, MFlow is not to blame...).
Something is wrong with your installation.
I prefer compiling myself and one trick is to then run the AllRun scripts or what they are called more than once.

[yinlad]

EDIT: Getting the following when I try to run a case

blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by blockMesh)
blockMesh: /tmp/_MEII44phM/libstdc++.so.6: version `GLIBCXX_3.4.32' not found (required by /usr/lib/openfoam/openfoam2412/platforms/linux64GccDPInt32Opt/lib/libblockMesh.so)

This sounds very much like an OpenFOAM specific issue (for once, MFlow is not to blame...).
Something is wrong with your installation.
I prefer compiling myself and one trick is to then run the AllRun scripts or what they are called more than once.

Running bash runCash.sh as advised above did work though, so that's interesting. But I at least have a path to running cases in Linux via WSL now.

[yinlad]

To summarise my WSL journey:

In windows powershell I ran:

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wsl --install

Restarted PC as prompted.
Back in powershell ran:

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wsl --install -d Ubuntu

Open Ubuntu via Windows menu and set up username/password as prompted.
In the Ubuntu terminal run:

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curl -s https://dl.openfoam.com/add-debian-repo.sh | sudo bash

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sudo apt-get update

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sudo apt-get install openfoam2412-default

Download and unzip the Mflow linux edition somewhere on my windows drive with my mantium cases etc.

Change 'MantiumFlow-MFlow_2504a_linux\MantiumFlow_default_settings/default_settings.ini' such that the local OF line comments are switched and the bottom section of the file reads as follows;

# This is the root folder for many OF Installations
# For a precompiled version, this would look like this:
local_OF_location=/usr/lib/openfoam/
#local_OF_location=~/SOFTWARE/OpenFOAM

Back in Ubuntu navigate to the mantium directory I have but the important part to understand is that /mnt/ takes you to the root of your windows machine so for me it's something like

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cd /mnt/x/mantium/2025/MantiumFlow-MFlow_2504a_linux

Once in the mflow directory run;

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./Mflow

This should launch the Linux Mflow GUI, albeit within Windows. From here open, apply settings and build a case as normal but do not run it via Mflow.

Navigate to the case you just built i.e.

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cd /mnt/x/mantium/2025/cases/001_testingtriplediffuserthatmakes-100cl

and then run it via

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bash runCase.sh

[janci_kp]

Does floor edge needs to be 10mm thick? Or is it considered as a trailing edge where 10mm rule doesn’t need to be met?

[LVDH]

To summarise my WSL journey:

Thank you so much for this. It realy helps to get new people into our crazy championship.

Does floor edge needs to be 10mm thick? Or is it considered as a trailing edge where 10mm rule doesn’t need to be met?

This is a rule that is not 100% defined. The idea behind it is that the first two thirds of a geometry is is above the 10mm and behind that the part narrows down to potentially 0mm.

[LVDH]

So, I have sent out the first email with submission details for the first race of the season.
If you did not receive it, it might be because you forgot to register. Getting the correct links and submitting the car, is as always your own responsibility.
If you forgot to register, just do so now. There will be another reminder email one or two days before the race, so nothing is lost.

[Dimitris]

Hi, i thought i post a little preview of my progress so far. Hoping to complete the last details in time to compete at the first race

[janci_kp]

I have a question regarding the rake. If I rotate the car excluding the wheels rear suspension will not be entirely within the wheel hub. If I modify suspension then it will not be inside the REG volume. How should I do it because when I tested my 26 model based on FIA regs -1,5 rake boosted DF by nearly 25%.

[The Rusted One]

If you have the rear suspension in the rear suspension folder then it should move along with it but I seem to have the same issues with the frt suspension where the MAND susp moves but not the "cover"

But if you're changing the rake in CAD, you're not supposed to do that. You do that in the settings of MFlow.
Rake does generate a lot more DF in my case, but the CoP gets ruined, so make sure it's in the range of 1.8 to 1.9 or you lose multiple secs of laptime