Unformatted text preview: a control volume whose surface is the interior surface of the room (excluding the sander) and a system consisting of the material within the control volume at time t = 0. (a) If N is the number of particles, discuss the physical meaning and evaluate the terms DN sys /Dt and ∂N cv /∂t . (b) Use the Reynolds transport theorem to determine the concentration of particles (particles/ m 3 ) in the exhaust air for steady state conditions. (c) Consider this problem for the case that the ventilating fan fails to work so that V 1 = V 2 = 0. Evaluate and discuss the meaning of the terms DN sys /Dt and ∂N cv /∂t for this case. Problem 4: Problems 5.13 , 5.16 and 5.25 of the text. Problem 5: Problems 5.26 , 5.30 and 5.31 of the text....
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 Winter '07
 Ganago
 Mechanical Engineering, Thermodynamics, University of Michigan Department of Mechanical Engineering, terms DNsys /Dt

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