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Flashcards in Fluid dynamics Deck (3)
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1

Explain drag and lift in fluid flow

Drag is the force that a fluid exerts on the surface of the fluid flow that is in the direction of the flow. Lift is the force that a fluid exerts on a surface that is perpendicular to the direction of the flow.

2

Explain the drag coefficient and the lift coefficient

Dc & Lc are dimensionless numbers that represent the drag and lift characteristics of a body in a fluid flow. It is calculated from drag force/(0.5*density*velocity2*Area).

Different shapes such as a sphere and a cone of a given angle have different experimentally determined drag coefficients.

 

3