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.
mirdavanfe
0
Joined: Wed Dec 31, 2003 3:26 am

Post by mirdavanfe » 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:

KeithYoung
23
User avatar
Joined: Wed Jul 02, 2003 7:21 pm
Location: USA

Post by KeithYoung » 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.

Silvershadow
0
Joined: Wed Jan 21, 2004 9:20 am

Post by Silvershadow » 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

Guest
0

Post by Guest » 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.

sirjulianv
0
Joined: Fri Nov 07, 2003 8:30 pm

SOFTWARE>>>>

Post by sirjulianv » 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!!!!


SchumiGo
0

Question about complex cad model cfd calculating

Post by SchumiGo » 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.

KeithYoung
23
User avatar
Joined: Wed Jul 02, 2003 7:21 pm
Location: USA

Post by KeithYoung » 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?

scarbs
335
Joined: Wed Oct 08, 2003 8:47 am
Location: Hertfordshire, UK

Post by scarbs » 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.

Guest
0

Post by Guest » 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.

SKRAT
0
Joined: Sat Aug 30, 2003 12:34 am

Post by SKRAT » 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

schumigo
0

CDF prorgram.

Post by schumigo » 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

StiK
0
Joined: Mon May 31, 2004 7:43 pm
Location: Portugal

Post by StiK » 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!!

West
0
Joined: Tue Jan 06, 2004 11:42 pm
Location: San Diego, CA

Post by West » 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

StiK
0
Joined: Mon May 31, 2004 7:43 pm
Location: Portugal

Post by StiK » Mon Jun 14, 2004 10:32 am

The velocity thing must be the velocity of the object which is still. The air is the one who's moving around it. I got acess to this program at my university but it's easy to get a free copy (my teacher says that companies who sell this software don´t mind we students copy it for personal use because when we go to work on a company we use it and then have to pay for it). FloWorks is indeed very simple to use but i wounder if the results are good.
There are some problems whit this model. My computer has limited Ram for this kind of testing(512MB) and it took almost three hours until the solver was finished.
Fell free to ask more about anything!