1 files changed, 21 insertions, 0 deletions
diff --git a/965/CH7/EX7.25/25.sci b/965/CH7/EX7.25/25.sci
new file mode 100644
index 000000000..dc2b06a97
--- /dev/null
+++ b/965/CH7/EX7.25/25.sci
@@ -0,0 +1,21 @@
+clc;
+clear all;
+disp("Average velocity")
+R=0.12;// radius of circular tube
+ts=90;//degree C
+disp("u = 2.7*r-3.2*r^2")
+u=(2/R^2)*integrate('2.7*r-3.2*r^2','r',0,R);
+disp("m/s",u,"Average velocity =")
+disp("t=85*(1-2.2*r)")
+m=integrate('(2.7*r-3.2*r^2)*(85*(1-2.2*r)*r)','r',0,R);
+n=integrate('(2.7*r-3.2*r^2)*r','r',0,R);
+tb=m/n;
+disp("degree C",tb,"mean bulk temperature tb =")
+Q=1000;//kJ/h
+Q=Q*1000/3600;//J/s
+A=2*%pi*R*1;
+h=Q/(A*(ts-tb));
+disp("W/m^2.C",h,"Heat transfer coefficient, h =")
+
+
+