Consider a flat plate with parallel airflow (top and bottom) characterized by [infinity] u[infinity]= 5 m/s, [infinity] t[infinity]= 20°c. determine the average convection heat transfer coefficient, convective heat transfer rate, and drag force associated with an l= 2.8-m-long, w= 2.8-m wide flat plate with a surface temperature of ts= 50°c. assume the critical reynolds number is 5x105.

On a average work day more than work place firs are reorted

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

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux