Fluid mechanics Flashcards
Fluid mechanics
Dynamic fluid force
Drag force
A force that acts in opposition to motion
What are the two types of drag
Surface drag
Form drag
What are the 3 factors that can reduce and increase drag
1) Velocity of the moving body
2) Cross sectional area of the moving body
3) Shape and surface characteristics of a moving body
The velocity of a moving body
Streamlining
Involves shaping a body so it can move as effectively and quickly through fluid as possible
The cross-sectional area of the moving body
The shape and the surface characteristics of a moving body
Bernoulli principle
Where air molecules exert less pressure the faster they travel and more pressure when they travel slower
Lift force
Causes a body to move perpendicular to the direction of travel
Angle of attack
The tilt of a projectile relative to the air flow
What happens to the pressure at the high velocity of air according to the Bernoulli principle
Low pressure
