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+// Display mode

+mode(0);

+// Display warning for floating point exception

+ieee(1);

+clear;

+clc;

+disp("Introduction to heat transfer by S.K.Som, Chapter 11, Example 3")

+disp("The view factors F13 and F31 between the surfaces 1 and 3 are ")

+//Determine the view factors F13 and F31 between the surfaces 1 and 3.

+//F1-2,3=F12+F13

+//So F13=F1-2,3-F12

+//Let F1-2,3=F123

+//From Radiation Shape factor b/w two perpendicular rectangles with a commom edge table we get F12=.027,F1-2,3=0.31

+F123=0.31;//View factor

+F12=.27;//View factor

+F13=F123-F12//View factor

+//A1,A2 and A3 are the emitting surface areas

+//From reciprocity relation F31=(A1/A3)/F13

+A1=2;

+A3=2.5;

+F31=(A1/A3)*F13