F1technical.net

Made "fast" CFD for old 3series bmw

added splitter and rear wing

which program did you use? very nice btw...do u own an old 3 series and planning to add a splitter and a rear wing?

amouzouris wrote:which program did you use? very nice btw...do u own an old 3 series and planning to add a splitter and a rear wing?

I used CFDesign 2010

I am doing these analysis for someone else
The car will be racing in BMW 325i cup

Tonn wrote:

amouzouris wrote:which program did you use? very nice btw...do u own an old 3 series and planning to add a splitter and a rear wing?

I used CFDesign 2010

I am doing these analyses for someone else
The car will be raceing in BMW 325i cup

cool!

You set the static pressure at the inlets (front grill etc) to 0... is that how it's often done? I've always wondered if there's a good shortcut to avoid dealing with cooling drag.

Well done, thanks for sharing this.

I never had to do this in CFDesign but it must be possible to add motion to the wheels ? Because with static wheels it is really far from the real situation ! Otherwise its a nice model you've got !

MadMatt wrote:I never had to do this in CFDesign but it must be possible to add motion to the wheels ? Because with static wheels it is really far from the real situation ! Otherwise its a nice model you've got !

Yes it's possible, but uses too much RAM, so it's quite hardcore for my laptop.

It's nice.

What specifically are you looking at? Rear end car geometry is something which has been studied in vast amounts, so you should have shortage of basic validation of aerostructures, and what should be going on.

Also, what program did you used to create the mesh? want to share a revealing picture of the volume mesh too?

Volume mesh


and lowered the car, 8cm from ground now

Much more menacing lower down :p! What did you use to mesh?

PNSD wrote:Much more menacing lower down :p! What did you use to mesh?

I used CFDesign own automatic meshing.
Yes, it needs some fine tuning, but right now I am trying to see that all the CAD models are ok to mesh.

I didn't realize it had such a function. Another question (sorry!) do the solution data files export as .dat ?

PNSD wrote:I didn't realize it had such a function. Another question (sorry!) do the solution data files export as .dat ?

I don't think so

HI
I am curious if you are willing to share you model?

I too am curious to perform CFD runs on that type of car. I race a 1993 BMW 325is and very interested in adding aero.

Regards,

Yea is there some updates on your project Tonn? What values of downforce and drag did you obtain with your models?