How do I go about finding the pressure exerted on a rectangular surface in a free flowing air stream?
I wouldn't imagine that this is directly related to the airspeed / surface area, but have no idea where to start. Is there even an equation, or does one need to do some kind of FEA?
For instance a 1.2m x 2.4m metal sheet suspended some distance above ground level, if I have a gust of wind at 8m/s (directly perpendicular to the sheet), what is the average pressure across the face of sheet?
Answer
Fd=12ρv2ACd
where
Fd is the force of drag (or in this case Force Against the flat plate)
ρ is the density of the air
v is the speed of the air against the object
A is the area of the object which the air is blowing against
Cd is the drag coefficient
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