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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1244/CH9/EX9.1/Example91.sce | |
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Diffstat (limited to '1244/CH9/EX9.1/Example91.sce')
| -rwxr-xr-x | 1244/CH9/EX9.1/Example91.sce | 29 |
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diff --git a/1244/CH9/EX9.1/Example91.sce b/1244/CH9/EX9.1/Example91.sce new file mode 100755 index 000000000..6a112e59a --- /dev/null +++ b/1244/CH9/EX9.1/Example91.sce @@ -0,0 +1,29 @@ +
+// Display mode
+mode(0);
+
+// Display warning for floating point exception
+ieee(1);
+
+clc;
+disp("Principles of Heat transfer, Seventh Edition, Frank Kreith, Raj M Manglik and Mark S Bohn, Chapter 9, Example 1")
+//Temperature of the tungsten filament in Kelvin
+T=1400;
+
+disp("a)Wavelength at which the monochromatic emissive power of the given tungsten filament is maximum in meters")
+//Wavelength in m
+lamda_max=2.898e-3/T
+
+disp("b)Monochromatic emissive power at calculated maximum wavelength in W/m^3")
+//Emissive power in W/m3
+Eb_max=12.87e-6*(T^5)
+
+//Given wavelength in meters
+lamda=5e-6;
+//Product of wavelength and temperature in m-K
+lamda_T=lamda*T;
+
+disp("c)Monochromatic emissive power at given wavelength in W/m^3")
+//Emissive power in W/m3
+Eb_lamda=Eb_max*(2.898e-3/(lamda_T))^5*(((%e^4.965)-1)/((%e^(0.014388/lamda_T)-1)))
+disp("Thus ,Monochromatic emissive power at 5e-6 m wavelength is 25.4% of the Monochromatic emissive power at maximum wavelength")
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