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Diffstat (limited to '1073/CH3/EX3.29/3_29.sce')
-rwxr-xr-x | 1073/CH3/EX3.29/3_29.sce | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/1073/CH3/EX3.29/3_29.sce b/1073/CH3/EX3.29/3_29.sce new file mode 100755 index 000000000..9c0b6ebfd --- /dev/null +++ b/1073/CH3/EX3.29/3_29.sce @@ -0,0 +1,27 @@ +clc;
+clear;
+//Example 3.29
+v=18.41*10^-6 //[sq m./s]
+k=28.15*10^-3 //[W/m.K]
+Npr=0.7 //Prandtl number
+Beta=3.077*10^-3 //K^-1
+g=9.81 //m/s^2
+Tw=350 //[K]
+T_inf=300 //[K]
+dT=Tw-T_inf //[K]
+L=0.3 //[m]
+//1.Free Convection
+Ngr=(g*Beta*dT*L^3)/(v^2) //Grashof number
+Npr=0.7 //Prandtl number
+
+Nnu=0.59*(Ngr*Npr)^(1.0/4.0) //Nusselt number
+h=Nnu*k/L //Average heat transfer coefficient [W/sq m K]
+printf("\n In free convection,heat transfer coeff,h=%f W/(sq m.K)\n",h)
+//2.Forced Convestion
+u_inf=4 //[m/s]
+Nre_l=u_inf*L/v
+Nnu=0.664*(Nre_l^(1/2))*(Npr^(1.0/3.0)) //Nusselt number
+h=Nnu*k/L //[W/sq m.K]
+printf("\n In forced convection,heat transfer coeff,h=%f W/(sq m.K)\n",h)
+printf("\n From above it is clear that heat transfer coefficient in forced convection is much larger than that in free convection \n ");
+
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