Cerbera CAD file for aero testing

[brogenville]

I'm currently working on an aero project to help bob skeleton racers go faster, and as a result, I've got quite familiar with CFD software. CFD stands for Computational Fluid Dynamics- so its basically like having a virtual wind tunnel on your computer. Anyway, I keep thinking it would be quite interesting to get a model of the cerb into the computer to see whats actually happening with the air flow over it, and indeed how much drag/downforce it experiences at different velocities (yes, I am a nerd). The only problem is that I would need a 3d CAD model of the car to start with.

So, does anyone out there have a cad drawing of the cerbera, or perhaps know where one might be found?

[Mattt]

Do you have the ability to use 3d CFD? Or would you only model in a 2D plane?

[brogenville]

Yup- its Fluent 3d that I'm using . To make the test worthwhile, 3d would definitely be more interesting; that said, if anyone has some 2d drawings then they could be interesting too, just wont be able to get accurate drag/lift results.

[egomeister]

I think you'll struggle to get any sort of meaningful model. I doubt one even existed at TVR so you chances of getting hold of anything accurate are pretty slim. How long would you expect a solve to take for a full can simulation anyway - what level can you simulate to?

[Mattt]

egomeister said:

I doubt one even existed at TVR

[JensenA]

I'd be interested to see what happens to a Cerb in a 'Wind tunnel'. I once didnt shut the boot properly, I'd noticed cars flashing me as I went past them but couldnt figure out why they were! Then I accelerated up to about xxx Mph, and suddenly, in my rear view mirror I saw the boot appear !! As soon as I slowed down to about 80, it went down. Maybe they do need a Max Power rear spoiler fitted

[brogenville]

With the computing power that I have available, which isn't awesome, I'm probably limited to about 3 million mesh elements, and even then, we're talking probably a day to crunch the numbers.

I knew that there probably wasn't a great chance of finding a "ready made" model, but I though I'm as well to see if someone out there has one. There's actually a cad file web-site called Turbosquid, and on there is a 3d model of a cerbera speed 12, but is $40 to download

As has been said, the aero development on the cerbera probably didn't extend beyond "hmnmmm, this should do...", so it could be interesting to see where improvements might be made.

[BCA]

You wont find an accurate model out there... Im capable of making one, but my fees would be beyond those of taking a real Cerb to a proper wind tunnel.

[brogenville]

I'm capable of making one too- I just cant be bothered!