Engineering, 18.07.2019 02:10 KenziePaul
Consider the flow of warm water (t =350 k) over a cool, flat surface. a) how will the thicknesses of the velocity and thermal boundary layers compare if the flow is laminar? (that is, which is larger, the velocity or thermal boundary layer? ) why? the flow is turbulent? why? why? b) how will the thicknesses of the velocity and thermal boundary layers compare if c) which flow would likely lead to a larger rate of heat transfer: laminar or turbulent?
Answers: 3
Engineering, 04.07.2019 18:10, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Engineering, 04.07.2019 18:10, agpraga23ovv65c
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10, katelynn73
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
Consider the flow of warm water (t =350 k) over a cool, flat surface. a) how will the thicknesses of...
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