[MVRC] Mantium Virtual Racecar Challenge 2024 (Grand Prix Cars)

[CAEdevice]

Quick 5 lap race on Assetto Corsa with the new season stats:

https://www.youtube.com/watch?v=Xz4aucI ... nel=Ft5fTL

Amazing, great work. interesting how the aerodynamic wake effect and the (relatively) unloaded settings influence the result in a race with overtaking, compared to our race on a single timed lap. Considering that in AC it is possible to manage many other parameters (tyres, behavior of the AI, center of gravity, rake and oscillations of the car) I think it should be our future goal. The graphics, even with standard cars, are very good thanks to the customization of the colors.

[Kvothe9]

Hi! I've decided to learn OpenFOAM and MVRC to potentially become a competitor in the next season. I recently installed OpenFOAM on Windows following József Nagy's videos and successfully obtained my first test results in ParaView. This confirms that both OpenFOAM and ParaView seem to be functioning properly.

I've also downloaded Max Taylor's example car models. To run CFD analysis with these models using MFlow, I believe I need to configure MFlow by adjusting the default_settings file with my specific folder locations. However, I'm unsure what UFO CFD Settings are.

I installed OpenFOAM on Windows 10 using the Linux Subsystem. Since I'm using Linux Subsystem, I guess my local folder location refers to the folders from ubuntu file. Following that, I assume I should use the "Open Case Folder" button to create a new case by referencing the MVRC_ExampleCar/input_files directory. However, I'm feeling a bit lost at this point. Any help would be greatly appreciated!

[spacehead3]

I assume I should use the "Open Case Folder" button to create a new case by referencing the MVRC_ExampleCar/input_files directory

The 2 example car files are complete ready to go input files. Assuming this works the same on Linux as it does on Windows, the procedure should be: select open case folder -> load "MVRC_ExampleCar" folder (the parent folder, not "input files") -> select the dropdown for which template you want to run (probably "MVRC Fast") -> hit build case -> hit run case

[Kvothe9]

When I hit run, something went wrong. I guess it's related to the OpenFOAM folder path.

Mod edit: I have edited your post to fix the image link (below). You need to link to something with a .jpeg ending or similar.

[yinlad]

When I hit run, something went wrong. I guess it's related to the OpenFOAM folder path. https://imgur.com/a/P2o3g8P

I'm not sure how well it's going to play with WSL. I would recommend using https://bluecfd.github.io/Core for windows and mflow, it should pretty much be install and go. Just make sure you are using the correct version for mflow, which should be stated on the website

[Kvothe9]

I got this error when I tried to run a case in blueCFD. I installed it successfully and built the case without any problems.

[yinlad]

I got this error when I tried to run a case in blueCFD. I installed it successfully and built the case without any problems.https://i.imgur.com/3CgR0GA.jpeg
Mod note: please make sure to have a real "image format" in you link if you want it visible to others.See my edit to your previous post for guidance.

Just use the build and run commands in mflow for best results, looks like you're trying to manually run which isn't necessary

[Kvothe9]

I built and ran using MFlow buttons. The build was successful, but clicking the run button didn't do anything. I checked the terminal for errors, which you can see in the photo.

[Ft5fTL]

Quick 5 lap race on Assetto Corsa with the new season stats:

https://www.youtube.com/watch?v=Xz4aucI ... nel=Ft5fTL

Amazing, great work. interesting how the aerodynamic wake effect and the (relatively) unloaded settings influence the result in a race with overtaking, compared to our race on a single timed lap. Considering that in AC it is possible to manage many other parameters (tyres, behavior of the AI, center of gravity, rake and oscillations of the car) I think it should be our future goal. The graphics, even with standard cars, are very good thanks to the customization of the colors.

Watching G-raph's car coudln't capitilize its huge downforce advantage was very suprising to me. Lower drag level of the Variante's car, drs and draft combined made huge difference.

I got this error when I tried to run a case in blueCFD. I installed it successfully and built the case without any problems.https://i.imgur.com/3CgR0GA.jpeg

The problem here is the wrong version of the blueCFD. You need to use the 2017-2 version of it. 2020 is not compatible with the mflow.

[Kvothe9]

Thanks to everyone who helped. I performed the first simulation using the example car and mflow. Mflow automatically generated post-processing images. I wanted to analyze the results manually using Paraview, but the generated case.foam file appears as 0kb, and when I open it with Paraview, I only see a rectangle with outer walls. Do I need to open a different file in Paraview? Thanks in advance.

[yinlad]

Thanks to everyone who helped. I performed the first simulation using the example car and mflow. Mflow automatically generated post-processing images. I wanted to analyze the results manually using Paraview, but the generated case.foam file appears as 0kb, and when I open it with Paraview, I only see a rectangle with outer walls. Do I need to open a different file in Paraview? Thanks in advance.

You have to mark is as a decompiled case in paraview and then you should be able to select the relevant pieces of the case to begin inspecting things. Not at a computer currently so can't tell you exactly where the option is.

Alternatively open the pregen sets directly as I demonstrated on page 1 of this thread

[Kvothe9]

The first time I ran the program, it worked successfully. However, when I tried to run it again without making any changes, I encountered an error. I reinstalled BlueCFD, but the error persists.

[LVDH]

Sorry, I was gone for a while.
But big thanks for everyone helping your new competitor out so well.

MFlow will receive updates that will also allow to run newer OF versions in Windows at some point. But I have no idea when this will be done, so for now, you simply have to use this dated version of Blue CFD on Windows.

The log you posted actually looks good (ends with "... and done"). The case was written and you get a warning message.
The message is related to the GUI, nothing to worry about. You should be able to run the case. MFlow exports a small file when running on Windows, I think it is called runCase.bat or something like that. If you do not want to start the case by using the GUI, you could just execute that file.

And the case.foam file is indeed just a 0Byte file, it is only used by Paraview to understand where the case is located. If you, as pointed out, select decomposed case and then switch to the latest time frame, you can analyze your entire case fully manually. I would always open the report first though as it will help you find areas you might want to check in more detail.

[yinlad]

I suppose it's that time again.

Between R01 and R02 the main surfaces of the car have changed front to back with the exception of the floor, which remains my Achilles heel. It is probably where I'm lacking compared to the leaders but have yet to find performance with any changes I have tried, small or large.

First, some renders.







Now some words!

Front Wing: Redesigned to a more scooped shape with a steeper mid section to improve overall load at the front. Endplates remain the same as R01.

Rear Wing: Maxed out version of the R01 wing, no considerations for efficiency.

Bodywork: Biggest change by far. Something about the R01 sidepod mesh was introducing some solve instability which is where my correlation issues stemmed from. I was due to make changes for R02 anyway in the wake of the battery and fuel cell changes that made radiator placement easier.

To that end I've moved the rads forward significantly while maintaining minimum size and sufficient cooling. The forwards move made flow conditioning on the steeper inlet harder but allowed for more freedom to shape the rear of the sidepod and engine cover to improve flow to the rear of the car.

This is a side by side of R01 vs R02 that highlights the difference. The change in volume at the rear is substantial.



I'm expecting probably P4 or P5 in the results. I think there are a couple of cars that can jump me in the order, but I might be saved by drag not playing as big of a role around Monaco

[LVDH]

Between R01 and R02 the main surfaces of the car have changed front to back with the exception of the floor, which remains my Achilles heel. It is probably where I'm lacking compared to the leaders but have yet to find performance with any changes I have tried, small or large.

The car and renders look awesome.
As someone who happens to know all the floors, I can tell you something interesting:
There is no "one" good design. The top floors look completely different. I think it is interesting to see that they are to converging into the same. So just try experimenting, there are many solutions...