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Diffstat (limited to '3685/CH18/EX18.5/Ex18_5.sce')
| -rw-r--r-- | 3685/CH18/EX18.5/Ex18_5.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3685/CH18/EX18.5/Ex18_5.sce b/3685/CH18/EX18.5/Ex18_5.sce new file mode 100644 index 000000000..b74a76cff --- /dev/null +++ b/3685/CH18/EX18.5/Ex18_5.sce @@ -0,0 +1,22 @@ +clc
+d = 8 // Average diameter in mm
+r = 750 // Density in Kg/m^3
+t = 2 // Intermediate temperature in degree celcius
+t_inf = 1 // Ambient temperature in degree celcius
+t0 = 25 // Initial temperature in degree celcius
+c = 3.35 // Specific heat in kJ/KgK
+h = 5.8 // Heat transfer coeeficient in W/m^2K
+T1 = 10 // time period in minutes
+T2 = 30 // time period in minutes
+t1 = 5 // Intermediate temperature in degree celcius
+printf("\n Example 18.5\n")
+tau1 = c*1e3*log((t0-t_inf)/(t-t_inf))/(h*60) // Time to cool down to 2 degree celcius
+tau2 = (t0-t_inf)*(exp(-(c*T1*60)/(c*1e3))) // Temperature of peas after 10 minutes
+Y = exp(-1*(c*T2*60)/(c*1e3))
+tau3 = (t0*Y-t1)/(Y-1)
+
+printf("\n Time to cool down to 2 degree celcius is %f min",tau1)
+printf("\n Temperature of peas after 10 minutes is %f degree celcius",tau2)
+printf("\n Temperature of peas after 30 minutes is %f degree celcius",tau3)
+//The answers given in book are incorrect
+
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