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//Variable declaration:
m = 0.075 //Mass rate of air flow (kg/s)
D = 0.225 //Diameter of tube (m)
mu = 208*10**-7 //Dynamic viscosity of fluid (N)
Pr = 0.71 //Prandtl number
k = 0.030 //Thermal conductivity of air (W/m.K)
//Calculation:
Re = 4*m/(%pi*D*mu) //Reynolds number
//From equation 9.26:
Nu = 0.023*(Re**0.8)*(Pr**0.3) //Nusselt number
h = (k/D)*Nu //Heat transfer coefficient of air (W/m^2.K)
//Result:
printf("The Heat transfer coefficient of air is : %.2f W/m^2.K.",h)
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