blob: 942dbaf8cc459d8b2147cecbc88d633218cfc10f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
//Variable declaration:
Ts = 110.0+273.0 //Surface temperature of plate (K)
Too = 30.0+273.0 //Ambient air temperature (K)
L = 3.5 //Height of plate (m)
g = 9.807 //Gravitational acceleration (m^2/s)
//Calculation:
Tf = (Ts+Too)/2 //Film temperature (K)
DT = Ts - Too //Temperature difference between surface and air (K)
//From appendix:
v = 2.0*10**-5 //Kinematic viscosity for air (m^2/s)
k = 0.029 //Thermal conductivity for air (W/m.K)
Pr = 0.7 //Prandtl number
B = 1.0/Tf //Coefficient of expansion (K^-1)
Gr = g*B*DT*L**3/v**2 //Grashof number
Ra = Gr*Pr //Rayleigh number
//Result:
printf("The Grashof number is : %.2f x 10^11 .",Gr/10**11)
printf("The Rayleigh number is : %.2f x 10^11 .",Ra/10**11)
|
