# Lift

Watch
Announcements
#1
How do you know what objects create lift, for example does a brick create lift?
0
6 years ago
#2
(Original post by Lauren_F1)
How do you know what objects create lift, for example does a brick create lift?
Anything with an aerofoil shape (aerodynamic shape) to it tbh (and also lightweight)....i.e. plane wings, formula one spoilers etc. That's my logical guess....don't have enough knowledge of fluid mechanics (yet) at this stage in my degree

Edit: I know someone might then ask what if you have a brick shaped like aerofoil and to that i answer why aren't planes made of brick then...?
0
6 years ago
#3
Anything could create lift in theory. It will only "fly" if the lift exceeds the weight AND the thrust (motion) of the object exceeds the drag.

The lift force is simply defined as perpendicular to the freestream velocity vector. It is a component of the resultant force generated from the pressure and shear distribution about an object.

How lift is generated in the first place is more complicated by you should read up about the starting vortex which, according to a few articles I've read, has been experimentally verified. Mathematically, you can express lift through the circulation about an aerofoil, but this is a mathematical concept, circulation doesn't really have any physical definition (according to what I know) but using Stokes Theorem, you can relate it to vorticity and it represents the flux of vorticity through a surface. Vorticity can then be thought of as the tendency for a local fluid element to rotate.
0
6 years ago
#4
Bricks CAN fly, think of a tornado or hurricane...
0
#5
Thanks for all the replies, so any object has lift, cool, thanks
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

Yes (54)
28.42%
No (136)
71.58%