Lift and Drag Flashcards
1
Q
What is Lift ?
A
- force that acts perpendicular to the fluid flow
- acts against gravity
- supports object
- a change in flow direction, creates lift in opposite direction
- high pressure on bottom, low pressure on top
2
Q
What is the Lift Coefficient equation?
A
CL = FL / 1/2 p V^2 A
A = top down view (planford)
3
Q
What is Drag?
A
- force that a flowing liquid exerts on a body in the flow direction
- undesirable
4
Q
What is the Drag Coefficient Equation?
A
Cd = Fd / 1/2 p V^2 A
A = frontal area
5
Q
What is a viscous fluid?
A
- fluid with internal friction (viscosity)
- resists motion
6
Q
What is an inviscous fluid?
A
- viscosity is close to or equal to 0
- no internal friction
- no shear stress
