4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tub...
Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), heat capacity of Cp 2 k]/(kg K) and thermal conductivity of Koll -0.15 W/(mk). This oil flows at mass flowrate of 30 kg/minute through a copper pipe of d- 2 cm inner diameter, with wall thickness of t-1 mm. At the relevant conditions, copper has thermal conductivity of ke 400 W/(m.K). The copper pipe loses heat to the surroundings of Tsurr 20°C...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1 m/s. This plate has a length L= 1 m and it is heated over its entire length; the plate temperature is constant Tp=100°C. The following data are given. For air: dynamic viscosity: mu = 1.9*10–5 kg/(m.s); density: rho = 1.05 kg/m3; conductivity k = 0.03 W/(m K); Specific heat Cp = 1.007 kJ/(kg K); Prandtl number Pr = 0.7 For laminar flow over a...