CFD - Computational Fluid Dynamics, Motorsport, Formula 1

Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. Please stick to F1 on this forum.

Post Sun Oct 19, 2003 10:09 pm

You're right, I should have been more explicit. I was in fact interested in streamwise vorticity to see the evolution of those vortices. Don't know if the interaction of the vortices increases performance. In general, the interaction between 2 vortices tends to dissipate them, which in principle should increase the pressure behind the wing and reduce pressure drag. But this is just a guess...
pabs
 
Joined: 12 Oct 2003

Post Wed Dec 31, 2003 4:04 am

wow this is a very technical website here,i'm a very active f1 fan but only recently have i started getting interested in the tech side of it all,i have no engeneering backgroung or knowledge so please be indulgent :wink:

on the subject of front wing and especially the vortexes,i was wondering if it wasn't possible to prevent them by doing this=

this little dash(-)being the nose cone,and this(>)being the front wing(with the angle obviously exagerated for the query purpose!
so we have here a nose with the front wing on it...... -> well ya get the picture!!,so the vortexes are happening at each end of the wing because the wing was straight(not anymore) or bent backward,but what if the wing was bent forward like this.......-<??? i know there would still be a massive disturbance hitting the cone in it's very center,but couldn't that massive extra air being dragged in the very center of the wing be of some use to the diffuser or get to the underneath splitter to help the cooling??

the fool is ready for the ignorant bashing!! :lol:
mirdavanfe
 
Joined: 31 Dec 2003

Post Thu Jan 01, 2004 8:16 am

sorry its new years and im lit so i didnt really make sure i took what you meant right hehe. well hell all im gunna do is ask if what you mean is similar to the X-29 then hit the hay. guns dont kill ppl, ppl kill ppl.
Keith Young
Consultant, Freelance Engineer, Writer
http://www.consultkeithyoung.com
k dot young at consultkeithyoung.com
KeithYoung
 
Joined: 2 Jul 2003
Location: USA

Post Wed Jan 21, 2004 9:23 am

Can anyone send me the cad files you are talking about? (ferrari and Arrows?)
I'm very eager of making some CFD calculations on them
Thanks in advance

email: silvershadow@email.it
Silvershadow
 
Joined: 21 Jan 2004

Post Wed Jan 21, 2004 12:45 pm

mirdavanfe wrote:wow this is a very technical website here,i'm a very active f1 fan but only recently have i started getting interested in the tech side of it all,i have no engeneering backgroung or knowledge so please be indulgent :wink:

on the subject of front wing and especially the vortexes,i was wondering if it wasn't possible to prevent them by doing this=

this little dash(-)being the nose cone,and this(>)being the front wing(with the angle obviously exagerated for the query purpose!
so we have here a nose with the front wing on it...... -> well ya get the picture!!,so the vortexes are happening at each end of the wing because the wing was straight(not anymore) or bent backward,but what if the wing was bent forward like this.......-<??? i know there would still be a massive disturbance hitting the cone in it's very center,but couldn't that massive extra air being dragged in the very center of the wing be of some use to the diffuser or get to the underneath splitter to help the cooling??

the fool is ready for the ignorant bashing!! :lol:


ahhhh yes... You mean kind of shape the front wing of the car like the wings of the Grumman X-29 plane. Not with such a great angle of sweep, but we get the idea. Yes, apparently the X-29 was very unstable because of this, as the vortices were drawn towards the center of the aircraft. I'm not really sure what would happen on the front wing of a forumla 1 car, but I would've thought that F1 teams have already tested such an idea. Perhaps there would somehow be less downforce produced by the front wing or something because if you look at Indy cars' front wings on the oval high speed circuits, you can see the reverse sweep of them, but on those circuits, they don't need very much downforce. Perhaps on F1 cars, the reduction in drag doesn't compensate for the loss in downforce, where they need substantially more downforce than indys on oval circuits.
Guest
 

Post Thu Feb 05, 2004 3:33 am

:?: :?: Well, im a young student of engineering trying to find some really basic software or even more complicated that deals with cdf in a cad interface. If anybody knows software other than FLUENT, please let me know cause i am close to graduate and im planing on doing my thesis on something on CFD.....
If you have any good ideas please let me know....

MONTOYA 2004!!!!
sirjulianv
 
Joined: 7 Nov 2003


Post Mon May 24, 2004 8:34 pm

I am very young student trying to understand aerodynamics law in racing.
:?: :?:
I have a 400 computers net, and i want to use a part for CFD calculating.
Does anybody knows how to do that??
Maybe somebody has an experience, or may give a piece of advice.


Thank you for all.
SchumiGo
 

Post Mon May 24, 2004 9:24 pm

What do you mean you have 400 computers net? Do you want to know how to use multiple computers at once for CFD or just how to use CFD in general?
Keith Young
Consultant, Freelance Engineer, Writer
http://www.consultkeithyoung.com
k dot young at consultkeithyoung.com
KeithYoung
 
Joined: 2 Jul 2003
Location: USA

Post Tue May 25, 2004 8:58 am

I assume you mean you have 400 computers entworked and you want to cluster them to use their collective RAM and processors, this requires expensive specialist software, probably not within your reaches.

Regardless you can use a good spec PC for CFD use, just look at the example in this thread.
scarbs
 
Joined: 8 Oct 2003
Location: Hertfordshire, UK

Post Tue May 25, 2004 9:19 am

Yes,i want to cluster them to use their collective RAM and processors with out huge money costs :lol: :lol:
May i create correct cad files in ProEngineering that can be calculating in Fluent?
Can you write current name and version of Fluent software that you use for CFD calculating.


Thank you for all.
Guest
 

Post Tue May 25, 2004 2:06 pm

The current Fluent version is 6.1.22 for my Windows box. I run dual processor on one Dell box, so it's very straight forward for me at least.

What are you going to use for meshing? (Gambit 2.x/TGrid3.5.x/3rd-party?)

Wow, more power to you if you have access to a cluster and Fluent licenses to match! (they are not cheap to come by!) I have heard that CFX (version 5.x?) is a little more friendly for cluster applications (advertised to have built for that environment). Anyway, if you have access to Fluent support services, they tend to be very helpful (and they should be for the price of the annual license)
-Paul C
SKRAT
 
Joined: 30 Aug 2003

Post Tue May 25, 2004 5:35 pm

What do you think the best combinations?
Hummingbird Exceed 7.0+
(CAD Fluent 5.5 by)+
(CAD Fluent Gambit v2.0 by Smily68
or
Fluent 6 +
Gambit 2 0 +
Airpak 2.06 +
Fluent Tutorial Trainer +
Exceed 6.2 3D.rar
schumigo
 

Post Mon Jun 14, 2004 2:13 am

Well i've been testing Floworks2004 with a rear wing. I must say that i'm new to CFD. I used Solidworks2004 for modeling this simple rear wing. I used JavaFoil for some inicial testing and predictions. I'll post some pictures of the results. I wanted to post some more but unfortunately the program crashed when i was trying to make them.
I set the velocity of air to 60m/s. The wing is 1m wide and 0.4 meters long(I think this are the standard measures).
Drag=483.5 N
Downforce=1955 N
I would like you people to comment the results :wink:

Image
Image
Image
Image
Image
Image
Image
Image

It seems to me that there is a stall in the second element. I think the values are quite realistic, but i'm no expert so i'm waiting for your opinion!!
StiK
 
Joined: 31 May 2004
Location: Portugal

Post Mon Jun 14, 2004 3:39 am

Those are really nice. But under local parameters it says velocity = 0?

BTW I wonder where you can get this kind of program w/o paying for it...
Bring back wider rear wings, V10s, and tobacco advertisements
West
 
Joined: 6 Jan 2004
Location: San Diego, CA

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