fluid- section 5.1.3 Moving, deforming Control volume. For an automobile moving

Question

fluid- section 5.1.3 Moving, deforming Control volume. For an automobile moving along a highway, describe the control volume you would use to estimate the flowrate of air across the radiator. Explain how you would estimate the velocity of the air. List and explain the steps and equations needed to do so. Then assume at 70 mph with a radiator dimension at 21.5 by 17.5 with a width of 1 inch that the air is incompressible, with Pressure1=Pressure2 and solve the problem with given above values. List each equation with reasoning behind why that equation is used.

Explanation / Answer

control volume will be the inlet and outlet of the radiator," use continuity equation, u need flow rate of air and dimension of radiator to calculate the velocity of air, Q = AV, for last part its just substitue the values in equation by keeping the fact in mind the units of quatities are differnet, for flow rate across radiator, Q = AV, V = 70mph, out let velocity A1V1 = A2 V2,

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