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clc
clear
printf('example 1.19 page number 54\n')
//to find the economic pipe diameter from nomograph
//from the nomograph,we get the values of w and density
w=450 //in kg/hr
density=1000 //in kg/m3
d=16 //in mm
u=(w/density)/(3.14*d^2/4);
Re=u*density*d/0.001;
if Re>2100 then printf("flow is turbulent and d= %f mm",d)
else disp ("flow is laminar and this nomograph is not valid")
end
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