robrob

I've been reading Competition Car Aerodynamics and I'm wondering if there's an S2000 model available for the free Openfoam computational fluid dynamics (CFD) software. Anyone know of a source or maybe a car with a similar shaped nose?

robrob

0 views in 4 hours?

I have searched the web but came up empty on Openfoam car models. I was hoping an engineer type could at least steer me in the right direction--i.e. which CAD models can be used or converted for use, etc.

clarkster009

I viewed, but I have no help for your original question

I did find these things for the Miata though, don't know if it helps

http://hanchagroup.wordpress.com/tag/openfoam/

http://hanchagroup.wordpress.com/author/paulwlucas/

clarkster009

http://sketchup.google.com/3dwarehou...70&prevstart=0

https://store.sketchup.com/?lang_code=en

Apparently sketchup has an OpenFoam plugin, but the software is a bit pricey.

thanasis11

ive been trying to do this as well but could never find a model. if you do let me know. i have access to star_ccm+ and ansys fluent

06Estukay

Your best bet is to find an independent car simulator modder who's made a 3D mesh of the S2000.

Here's one for rFactor. http://rfactorcentral.com/detail.cfm?ID=ENSUSHIYA. Contact the creator, and ask him for the model. From there, you can convert it to whatever format you need.

Or, just search for some 3D models. There are tons of free ones available on various 3D modelling sites. Here's a couple:
http://www.creativecrash.com/marketp.../c/honda-s2000
http://thefree3dmodels.com/stuff/veh...000/13-1-0-145

robrob

Clarkster, thanks for the links. The Mazda Miata info is very cool and useful.

Thanks for the model links Estukay. The commercial 3D model is $182. I'm having trouble downloading the free model. All of the models seem to be top down anyway which would really hurt wing analysis.

I'll update this thread if I'm able to get anything going.

I added a crapload of stuff to the S2000 Aerodynamics page.

tongboy

I played with a lot of CFD for my car as I work to build it to the limits of my ruleset.

The biggest issue I ran into with models for CFD is that although you can generally dig around and find car body models most of them are done in splines and that just doesn't work for CFD - you need a full 3d model with mass, not 2d shapes in a 3d world. converting from splines to 3d can be very painful depending on the type of splines and how they were created.

cfd is an art in and of itself. I like the book mentioned and own a copy, it sits right next to my sports car suspension in the same series. CFD without an understanding of what your modeling is trying to measure something when you don't quite know what your measuring - sure the gauge moves when you change things but it's never quite what you thought it would be.

I found the biggest value in cfd to be in basic 2d models - it's really easy to see the difference a splitter or a spoiler makes in that space - yes, it's going to be different in 3d space but without the ability to model a car in every corner and angle of approach (which no one at our level can afford to do) you have to find a happy cost/time to benefit ratio.

robrob

Thanks for the info tongboy. I want to play around with Openfoam for fun and education but with the apparent lack of use by hobbyists I assume there must be a very steep learning curve.

plucas

robrob, I am actually the one who did the Miata CFD study using OpenFOAM. If you need help setting up a case using OpenFOAM, let me know. I have done a few more cars recently besides the Miata. Setting up the cases correctly can be difficult, especially without being an engineer with a fundamental knowledge of fluid dynamics and CFD.

GTi I did some consulting on


FRS that I am working on an aerodynamic package for


I would love to do a S2000 since it is one of the cars I am looking at purchasing

Sorry for bumping a thread that is a few months old...