flow? How is flow described using the
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- How is volume flow rate different than velocity? What happens to volume flow rate in areas where fluid pressure is high?What are the two mechanisms theoretically considered in turbulent flow?What is the physical significant of prandtl number? Question does the value of the prandtl number depend on the type of flow, or the flow geometry? Does the prandtl number of air change with pressure? does it change your temperature?
- How does the wall shear stress ?w vary along the flow direction in the fully developed region in (a) laminar flow and (b) turbulent flow?What is the physical significance of the Nusselt number? How is it defined? How is it used?What is meant by three-dimensional flow? Give an example of each of three-, two-, and one-dimensional flows.
- In creeping flow, the value of Reynolds number is typically (a) Re < 1 (b) Re ≪ 1 (c) Re > 1 (d ) Re ≫ 1 (e) Re = 0What is the Stefan-Boltzmann Law? Distinguish between black and gray body What is the hydraulic diameter? Where is it used? Distinguish between Biot number and Nusselt number.What is the function of V-cone flow element and manifold pressure measuring devices, where equipment this can applied and What manufacturing processes may they be found in?
- Someone claims that in fully developed turbulent flow in a pipe, the shear stress is a maximum at the pipe wall. Do you agree with this claim? Explain.Consider an air solar collector that is 1 m wide and 5 m long and has a constant spacing of 3 cm between the glass cover and the collector plate as shown in Figure below, Air flows at an average temperature of 45°C at a rate of 0.15 m/s through the 1-m-wide edge of the collector along the 5-m-long passageway. Disregarding the entrance and roughness effects and the 90° bend, determine the pressure drop in the collector.Consider an air solar collector that is 1 m wide and 4 m long and has a constant spacing of 3 cm between the glass cover and the collector plate. Air flows at an average temperature of 45°C at a rate of 0.12 m3/s through the 1-m-wide edge of the collector along the 4-m-long passageway. Disregarding the entrance and roughness effects and the 90° bend, determine the pressure drop in the collector.