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Force on a plate (momentum question)
2

Force on a plate (momentum question)

Force on a plate (momentum question)

(OP)
How do I calculate the force on a stationary plate that is impacted by a fluid at a mass flow rate of 20 tons/min and velocity of 60ft/s?  

RE: Force on a plate (momentum question)

Force is equal to the mass flow rate times the change in velocity, the velocitys (in/out) are vector quantities.

For example: If the flow strikes the plate and turns 90 degrees, then the change in velocity is your 60 ft/sec, if it turns 180 degrees, then the change in velocity is 2 X the initial velocity.

The equation is dimensionally consistent in any rational system of units.  If the units in the solution do not come out as a force, then your units are incorrect.

RE: Force on a plate (momentum question)

(OP)
Thank you everyone for your replies. This was a simplification of a problem I am working on.  Needed confirmation that I was on the right track since I haven't looked into these types of things for some time now.

Thanks again!

RE: Force on a plate (momentum question)

The solution from the fluids book involves the application of the Reynold's Transport Theorem to momentum, if I remember correctly.

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