Engineering, 09.10.2019 05:00 stryjker
Pipe diameter and reynolds number. an oil is being pumped inside a 10.0-mm-diameter pipe at a reynolds number of 2100. the oil density is 855 kg/m3 and the viscosity is 2.1 × 10−2 pa · s. what is the velocity in the pipe? it is desired to maintain the same reynolds number of 2100 and the same velocity as in part (a) using a second fluid with a density of 925 kg/m3 and a viscosity of 1.5 × 10−2 pa · s. what pipe diameter should be used?
Answers: 1
Engineering, 03.07.2019 14:10
When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point
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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?
Answers: 1
Engineering, 04.07.2019 18:20
Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false
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Engineering, 04.07.2019 19:10
Acircular aluminum shaft mounted in a journal is shown. the symmetric clearance gap between the shaft and journal is filled with sae 10w-30 oil at t 30°c. the shaft is caused to turn by the attached mass and cord. develop and solve a differential equation for the angular speed of the shaft as a function of time.
Answers: 2
Pipe diameter and reynolds number. an oil is being pumped inside a 10.0-mm-diameter pipe at a reynol...
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