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Diffstat (limited to '1073/CH3/EX3.31')
| -rwxr-xr-x | 1073/CH3/EX3.31/3_31.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/1073/CH3/EX3.31/3_31.sce b/1073/CH3/EX3.31/3_31.sce new file mode 100755 index 000000000..ab18e5eef --- /dev/null +++ b/1073/CH3/EX3.31/3_31.sce @@ -0,0 +1,21 @@ +clc;
+clear;
+//Example 3.31
+v=18.97*10^-6 //m^2/s
+k=28.96*10^-3 //W/(m.K)
+Npr=0.696
+D=100 //Outer diameter [mm]
+D=D/1000 //[m]
+Tf=333 //Film temperature in [K]
+Tw=373 //[K]
+T_inf=293 //[K]
+dT=Tw-T_inf //[K]
+Beta=1/Tf //[K^-1]
+g=9.81 //[m/s^2]
+L=3 //Length of pipe [m]
+Ngr=(g*Beta*dT*(L^3))/(v^2) //Grashof number
+Nra=Ngr*Npr
+Nnu=0.10*(Ngr*Npr)^(1.0/3.0) //nusselt number for vertical cylinder
+h=Nnu*k/L //W/(sq m.K)
+Q_by_l=h*%pi*D*dT //Heat loss per metre length [W/m]
+printf("\n Hence,Heat loss per metre length is %f W/m \n",Q_by_l);
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