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//Variable declaration:
Ts = 113.0+273.0 //Surface temperature of bulb (K)
Too = 31.0+273.0 //Ambient air temperature (K)
D = 0.06 //Diameter of sphere (m)
g = 9.8 //Gravitational acceleration (m/s^2)
//Calculation:
Tf = (Ts+Too)/2 //Mean temperature (K)
//From Appendix:
v = (22.38*10**-5)*0.0929 //Kinematic viscosity (m^2/s)
Pr = 0.70 //Prandtl number
k = 0.01735*1.729 //Thermal conductivity (W/m.K)
B = 1.0/(Tf) //Coefficient of expansion (K^-1)
Gr = g*B*(Ts-Too)*D**3/v**2 //Grashof number
Ra = Gr*Pr //Rayleigh number
//From equation 10.13:
h = (k/D)*0.6*Ra**(1.0/4.0) //Heat transferred from bulb (W/m^2.K)
//Result:
printf("The heat transferred from bulb to air is : %.2f W/m^2.K.",h)
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