2008 CDG Concept - CFD Analysis

[kilcoo316]

Why don't they just ban the diffuser?

[I know there will be an aero-balance problem with the front wing, but let the teams sort it out].

[dumrick]

As far as the flip-ups is concerned to cause dirty air etc, read the rule book 'dumrick', any object causing the airflow to disturb at the rear of the car would not be permitted Simple as that. What ever you do, if they find it working you will be asked to remove it!

Ok, I've done it and, in fact, those rules concerning the bodywork having to be lower and narrower at the rear kind of limit what I had in mind...

[flynfrog]

i can run it on star cd but i prefer star ccm

we have fluent as well but ive never used it

http://blogs.zdnet.com/emergingtech/index.php?p=235

this will be the computer

and yes you can veiw your results in full immersive 3d

Alright then no worries, I should generate a file for both Star-CD and Fluent for you to run. Star-CD is a bit complicated! how about Fluent and I send you a little guide on what to do? I will set every boundary condition in advance (say 200 km/hr) like the simulations, all you need to do is press go or Iterate I should say!

Let me know what you think and most importantly what will be your limit on cell count? So that I generate reasonable mesh.

Oh, how on earth do I transfer you the case file? In case of 10 million cells the least, it generates some thing equal to 500MB!

Thanks.

im not completly sure what our cell count max is for the new computer since its not up and running yet

once I get back to campus i can set up a server you can dump it too

are you in the states? if so it might be easier to mail me a cd

also have you tried the new ccm package its about 300 times easier to use

[kilcoo316]

Fluent typically grabs a GB mem for every 700k cells in my experience.


You could set up an ftp for the transfer [try filezilla for example]

[flynfrog]

also if i cant get it to work in fluent star ccm will use a fluent mesh im not sure how to do a moving mesh yet for wheels

[miqi23]

Well I have kind of used Star CCM and I know it is easy to use but trust me mate it is very limited.

I dont live in the states, however as Kilcoo mentioned we will try to sort out some ftp transfer otherwise ask some one else on this forum to volunteer for our good old draft dodging analysis.

Just a quick question though, does any one have managed to model the diffuser for the 2008 car correctly, I can but I am afraid I dont have enough time at the moment. Would be great if some one can volunteer! Just stick it on the current model and off we go with the proper diffuser in place!

Thanks.

[Jersey Tom]

Hmm. I need to learn some CFD this year. Unfortunately I am limited to

a) Cosmos Floworks. Don't think Fluent is around on campus, though I may be mistaken

b) Computers with 3.4GHz P4s and 1GB RAM.

[flynfrog]

Well I have kind of used Star CCM and I know it is easy to use but trust me mate it is very limited.

I dont live in the states, however as Kilcoo mentioned we will try to sort out some ftp transfer otherwise ask some one else on this forum to volunteer for our good old draft dodging analysis.

Just a quick question though, does any one have managed to model the diffuser for the 2008 car correctly, I can but I am afraid I dont have enough time at the moment. Would be great if some one can volunteer! Just stick it on the current model and off we go with the proper diffuser in place!

Thanks.

it worked quite well for me i do under stand its limited but for my research into low drag solar car stuff it work pretty well and it now includes an easy mesher for some one like me whith no formal training is a godsend i may not get the most acurate results but it does allow me to compare design a to design b

i am in the middle of a hard drive crisis right now but as soon as its sorted out i can set up an ftp

[miqi23]

Can the built in mesher handle a whole Formula 1 car? Can you set density functions for capturing wakes etc?

I am a big fan for Hex-dominant grids when it comes to complicated surfaces like we have on a F1 car. ANSA and t-grid does a great job here. Not sure if your mesher can do it but would be great to find out

[flynfrog]

Can the built in mesher handle a whole Formula 1 car? Can you set density functions for capturing wakes etc?

I am a big fan for Hex-dominant grids when it comes to complicated surfaces like we have on a F1 car. ANSA and t-grid does a great job here. Not sure if your mesher can do it but would be great to find out

right now im am running protoype software good to have freinds working for star i guess

once the big compter is up ill let you know my home computer is about a waste of time

[AeroGT3]

i can run it on star cd but i prefer star ccm

we have fluent as well but ive never used it

http://blogs.zdnet.com/emergingtech/index.php?p=235

this will be the computer

and yes you can veiw your results in full immersive 3d

Alright then no worries, I should generate a file for both Star-CD and Fluent for you to run. Star-CD is a bit complicated! how about Fluent and I send you a little guide on what to do? I will set every boundary condition in advance (say 200 km/hr) like the simulations, all you need to do is press go or Iterate I should say!

Let me know what you think and most importantly what will be your limit on cell count? So that I generate reasonable mesh.

Oh, how on earth do I transfer you the case file? In case of 10 million cells the least, it generates some thing equal to 500MB!

Thanks.

Is there any way I could get a copy of this for Fluent? 3-4 million cells? (It would be run on a desktop lol