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author | priyanka | 2015-06-24 15:03:17 +0530 |
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committer | priyanka | 2015-06-24 15:03:17 +0530 |
commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2510/CH9/EX9.12 | |
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-rwxr-xr-x | 2510/CH9/EX9.12/Ex9_12.sce | 24 |
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diff --git a/2510/CH9/EX9.12/Ex9_12.sce b/2510/CH9/EX9.12/Ex9_12.sce new file mode 100755 index 000000000..b553e9162 --- /dev/null +++ b/2510/CH9/EX9.12/Ex9_12.sce @@ -0,0 +1,24 @@ +//Variable declaration: +T1 = 15.0 //Water entering temperature (°C) +T2 = 60.0 //Water leaving temperature (°C) +D = 0.022 //Inside diameter of tube (m) +V = 0.355 //Average water flow velocity (m/s) +TC = 150.0 //Outside wall temperature (°C) +//From Appendix: +p = 993.0 //Density of water (kg/m^3) +mu = 0.000683 //Dynamic viscosity of water (kg/m.s) +Cp = 4.17*10**3 //Heat capacity of water (J/kg.K) +k = 0.63 //Thermal conductivity of water (W/m.K) + +//Calculation: +Tav1 = (T1+T2)/2.0 //Average bulk temperature of water (°C) +Re = D*V*p/mu //Reynolds number +Pr = Cp*mu/k //Prandtl number +Tav2 = (Tav1+TC)/2.0 //Fluid's average wall temperature (°C) +//From Appendix: +mu_w = 0.000306 //Dynamic viscosity of fluid at wall (kg/m.s) +//From Table 9.5: +h = (k/D)*0.027*Re**0.8*Pr**0.33*(mu/mu_w)**0.14 //Heat transfer coefficient for water (W/m^2.K) + +//Result: +printf("The heat transfer coefficient for water is : %.1f W/m^2.K.",h) |