[MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
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CAEdevice
47
Joined: Thu Jan 09, 2014 2:33 pm
Location: Erba, Italy

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Hi, maybe someone of us could be interested in this web meeting:

https://www.foamacademy.com/gofun/

Our big boss André (LDVH) will talk about our challenge and OpenFOAM simulation on April 22th from 15:00
Registration open until 20.04.2020 (today) !

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machin
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Joined: Tue Nov 25, 2008 1:45 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Hi Joe, Yeah, it would be clearer to say;
Joe7218 wrote:
Mon Apr 20, 2020 6:49 am
"6.1.3 Must be located within the bodywork volume at a point 1540mm rearward of the FWCL, and more than 700mm above the reference plane.”
On my car the lower edge is at 733mm above the reference plane.
COMPETITION CAR ENGINEERING -Home of VIRTUAL STOPWATCH

Joe7218
Joe7218
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Joined: Mon Aug 26, 2019 12:40 am

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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machin wrote:
Mon Apr 20, 2020 10:50 am
Hi Joe, Yeah, it would be clearer to say;
Joe7218 wrote:
Mon Apr 20, 2020 6:49 am
"6.1.3 Must be located within the bodywork volume at a point 1540mm rearward of the FWCL, and more than 700mm above the reference plane.”
On my car the lower edge is at 733mm above the reference plane.
Alright cool that makes more sense, thanks! :)

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machin
162
Joined: Tue Nov 25, 2008 1:45 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Joe7218 wrote:
Mon Apr 20, 2020 10:53 am
Alright cool that makes more sense, thanks! :)
No worries, if you (or anyone else) has queries like that please ask and I will try and do a rules page update to add clarifications like that. 👍👍👍
COMPETITION CAR ENGINEERING -Home of VIRTUAL STOPWATCH

etsmc
etsmc
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Joined: Wed Apr 04, 2012 12:20 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Anyone else had issues downloading the CFD parts in STL format? tried doing it from the challenge site but seems to be a dead link, would anyone have the files they could send me?

etsmc
etsmc
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Joined: Wed Apr 04, 2012 12:20 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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etsmc wrote:
Tue Apr 21, 2020 12:21 am
Anyone else had issues downloading the CFD parts in STL format? tried doing it from the challenge site but seems to be a dead link, would anyone have the files they could send me?
Dont worry found them hidden away from last year.. First simulation is now running :)

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yinlad
18
Joined: Fri Nov 08, 2019 7:10 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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EDIT: Removed because I was wrong and stupid :wtf:
MVRC - Panthera

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yinlad
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Joined: Fri Nov 08, 2019 7:10 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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etsmc wrote:
Tue Apr 21, 2020 5:24 am
etsmc wrote:
Tue Apr 21, 2020 12:21 am
Anyone else had issues downloading the CFD parts in STL format? tried doing it from the challenge site but seems to be a dead link, would anyone have the files they could send me?
Dont worry found them hidden away from last year.. First simulation is now running :)
Good luck!
MVRC - Panthera

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AratzH
9
Joined: Tue May 07, 2013 8:24 am
Location: Michigan

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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AratzH wrote:
Sat Apr 18, 2020 2:56 pm
I tried the new version and the post processing pictures still go into the root folder, one level up from the case folder.
Also, for some reason sometimes I get the U_nearWalls VTK and pictures but other not. Apparently there is some error while sampling some parts:
Time = 2500

Reading fields:
volScalarFields: static(p)_coeff total(p)_coeff
volVectorFields: U

Executing functionObjects
--> FOAM Warning :
From function void Foam::mappedPatchBase::calcMapping() const
in file mappedPatches/mappedPolyPatch/mappedPatchBase.C at line 604
Did not find 24052 out of 23575 total samples. Sampling these on owner cell centre instead.
On patch wheel_fl on region region0 in mode nearestCell
with offset mode normal. Suppressing further warnings from mappedPatchBase
[9] Generating stack trace...

Any ideas?
Regarding this error a few comments. By mistake I run another case using the carCoarse template (bad idea, results will be very different) and the post processing completed all the steps without error, but pictures still went into the root folder and no report was generated.
Also, I found another bug where if I choose 28 processors in mflow it will set up the case to run in 36. It's not the end of the world since I can manually change it before running, but I thought it was worth mentioning.
MVRC -> TF

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spacehead3
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Joined: Tue Mar 31, 2020 12:13 pm
Location: Detroit

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Hey all. Car is coming along well, having a fun time working on this. Would someone be able to tell me the porous media coefficients? Thanks!
Max Taylor

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LVDH
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Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Yesterday night, I uploaded a new MFlow version. It fixes issues involving the strange behavior you have seen in Windows. You should now be able to start the simulation through the GUI again and the post-processing images get put into the correct folder again.
The fix killed something else though, that I had to deactivate. The terminal output from the mesher and cfd solver does not get piped into the MFlow GUI anymore (for now). This means that you will have to take care and check for yourself if the simulation is still running.

Joe7218
Joe7218
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Joined: Mon Aug 26, 2019 12:40 am

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Finally managed to produce decent downforce and low drag and my cooling decides to not work :( really makes you appreciate how everything on the car affects the air flow

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jjn9128
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Joined: Tue May 02, 2017 10:53 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Joe7218 wrote:
Thu Apr 23, 2020 10:59 am
Finally managed to produce decent downforce and low drag and my cooling decides to not work :( really makes you appreciate how everything on the car affects the air flow
I've found unloading the inboard portion of the front wing really helps cooling, obviously leaving enough for the y250. Especially as the front suspension members can't be angled to clean their wake. You lose front downforce though.
#aerogandalf
"There is one big friend. It is downforce. And once you have this it’s a big mate and it’s helping a lot." Robert Kubica

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wb92
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Joined: Mon Jul 22, 2019 10:21 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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Last year I mentioned once, with these cars it's like that:
downforce/balance/cooling -> one can choose only 2 :P

The story continues... also in my case.
MVRC - WBRacing

Joe7218
Joe7218
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Joined: Mon Aug 26, 2019 12:40 am

Re: [MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

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jjn9128 wrote:
Thu Apr 23, 2020 11:22 am
Joe7218 wrote:
Thu Apr 23, 2020 10:59 am
Finally managed to produce decent downforce and low drag and my cooling decides to not work :( really makes you appreciate how everything on the car affects the air flow
I've found unloading the inboard portion of the front wing really helps cooling, obviously leaving enough for the y250. Especially as the front suspension members can't be angled to clean their wake. You lose front downforce though.
thanks for the tip!
I'm pretty certain I'm not getting as much cooling flow as I need because one of my main bargeboard elements is stalled and preventing som air from entering some sidepods. Once I fix that I should be getting good cooling again.

Heres my sneak-peek :)

Image