Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
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Chapter 6, Problem 6.2P
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- Consider two cases involving parallel flow of dry air at V = 4.5 m/s, T, = 45°C, and atmospheric pressure over an isothermal plate at T = 20°C. In the first case, Re= 5x 105, while in the second case the flow is tripped to a turbulent state atx = 0 m. At whatx -location, in m, are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes, in W/m?, at this location for the two cases? x = i m Jam i W/m? i W/m? I turbarrow_forwardWater at 20 C flows in a smooth pipe 0.04 m indiameter at a Reynolds number of 50,000. Thewall temperature is maintained at 25C. The bulk temperature and film temperature are assumed to be at 20C. Using Colburn analogy find the value of heat transfer coefficient. The properties of water are: Density = 999 kg/m3; viscosity = 1 cp; Pr = 6.94; Specific heat 4182 K/kgK; k=0.603 W/mKarrow_forwardA steam reservoir is covered by a rectangular plate (its length is 1 m and width 2 m). The steam temperature is 95o C, and it is in contact with the plate. Over the outside surface of the plate, water is flowing at a speed of 3 m/sec at a temperature of 25o C. What is the mean Nusselt number over the plate? What is the mean heat transfer convective coefficient over the plate? What is the heat transfer rate to the water?arrow_forward
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