What is fluid dynamics?

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flameracing
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What is fluid dynamics?

Postby flameracing » Sun Feb 21, 2010 4:05 am

This is a branch of aerodynamics that i bearly understand could someone help me.
Im in the f1 in schools competition. in the competition we design a car and race it, the car is propelled by a c02 cylinder there i thought fluid dynamics could help.

matt
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Jersey Tom
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Re: what is fluid dynamics

Postby Jersey Tom » Sun Feb 21, 2010 6:05 am

Backwards. Air and water are both fluids, the study of their motion, forces, etc.. falls under fluid mechanics.

Often a 3rd year course at university, in which failing homework and exams can be typical.

Please begin by familiarizing yourself with, and memorizing the Navier-Stokes equations in spherical co-ordinates. Once you've finished up with that easy bit we can move onto the practical.

Image

Or... you can just use common sense and build a quick 'car' without goin bananas..
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

flameracing
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Joined: Tue Oct 27, 2009 6:12 am

Re: what is fluid dynamics

Postby flameracing » Sun Feb 21, 2010 8:35 am

damn im happy that uni is a long way away
could you by any chance dum it down
if not F@*&
i like salty peanuts

horse
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Re: what is fluid dynamics

Postby horse » Sun Feb 21, 2010 2:52 pm

I think Jersey Tom might be pulling your chain a bit there. Those are, I think, just the incompressible equations too, so it can get harder.

Anyway, if you can find a solution to those equations for an arbitrary problem then you'll win a Fields Medal I should think.

If you really want to get a bit more of a grip on fluid dynamics I would start by considering the fundamental phenomena of 'Advection' and 'Diffusion'. These processes are described in the above equations, but also have some fundamental physical meaning.

Here's some quick links to have a look:

http://en.wikipedia.org/wiki/Advection

http://en.wikipedia.org/wiki/Diffusion

There's probably better out there than these, but I'm sure you're better at hyperlinking than me. The introduction to a fluid dynamics text book would inform you at lot also, and give you a peek into the weird world of turbulence.
"Words are for meaning: when you've got the meaning, you can forget the words." - Chuang Tzu

Jersey Tom
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Re: what is fluid dynamics

Postby Jersey Tom » Sun Feb 21, 2010 3:00 pm

The point being.. I think trying to get into upper division engineering theory for this project is overkill and a waste of time.

Focus on the low hanging fruit.
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

mep
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Re: what is fluid dynamics

Postby mep » Sun Feb 21, 2010 3:46 pm

It's always good to seek for a deeper understanding of how stuff works. In this case I recommend you buying a book about fluid mechanics. It might probably not make your car instantly faster but at least you already know much of the fluid stuff when you later attempt to some university.

For this forum you have to ask a more specified kind of question. Explaining all the fluid stuff is just to much.

manchild
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Joined: Fri Jun 03, 2005 9:54 am

Re: what is fluid dynamics

Postby manchild » Sun Feb 21, 2010 7:56 pm

Jersey Tom wrote:...


Image

sticky667
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Joined: Mon Mar 09, 2009 8:33 pm

Re: what is fluid dynamics

Postby sticky667 » Mon Feb 22, 2010 7:32 pm

classic piece of work there.

flameracing
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Re: what is fluid dynamics

Postby flameracing » Wed Feb 24, 2010 5:53 am

i want the best possible burst from the co2 cylinder what could help
i like salty peanuts

fastback33
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Re: what is fluid dynamics

Postby fastback33 » Tue Mar 02, 2010 8:35 am

Just to piggyback a little bit. Does anyone have a good recommendation for a Fluid mechanics book?

xpensive
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Re: what is fluid dynamics

Postby xpensive » Tue Mar 02, 2010 8:48 am

My humble xperience, if you can believe that concept now, is that many engineers never really grasp the concept of static and dynamic pressure as a constant-sum game. But it's a very good beginning of understanding fluid dynamics.
"I spent most of my money on wine and women...I wasted the rest"

twoshots
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Re: what is fluid dynamics

Postby twoshots » Tue Mar 02, 2010 9:03 am

Have you looked it up on wikipedia?

http://en.wikipedia.org/wiki/Fluid_dynamics

noname
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Location: EU

Re: what is fluid dynamics

Postby noname » Tue Mar 02, 2010 10:11 am

flameracing wrote:This is a branch of aerodynamics

it's opposite. fluid dynamics is more general and so aerodynamics is rather a branch of the fluid dynamics.

flameracing
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Joined: Tue Oct 27, 2009 6:12 am

Re: what is fluid dynamics

Postby flameracing » Tue Mar 02, 2010 10:50 pm

yes i have read wikipedia
and thanks for that info on the branches and stuff
i like salty peanuts

ashf1mclaren
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Re: what is fluid dynamics

Postby ashf1mclaren » Wed Mar 03, 2010 11:55 pm

hey guys is it possible in some cfd programs to simulate co2 being released from the canister and also is it possible to rotate wheels to a speed,what programs are able to do this a how much are they
thanks :? :?
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