Engineering, 13.02.2022 09:40 Kling1982
If they equation of the velocity profile over a plate is u=3y^(2/3) in which The velocity in m/s at a distance y meters above the plate, determine the shear stress at y=0 and y=5cm. Take viscosity=8.4 poise.
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Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
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Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
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Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
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Engineering, 04.07.2019 18:10
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
If they equation of the velocity profile over a plate is u=3y^(2/3) in which The velocity in m/s at...
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