Thermodynamics HW Solutions 543

Thermodynamics HW Solutions 543 -...

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Chapter 7 External Forced Convection 7-17 "!PROBLEM 7-17" "GIVEN" Vel=55 "[km/h], parameter to be varied" height=4 "[m]" L=10 "[m]" "T_infinity=5 [C], parameter to be varied" T_s=12 "[C]" "PROPERTIES" Fluid$='air' k=Conductivity(Fluid$, T=T_film) Pr=Prandtl(Fluid$, T=T_film) rho=Density(Fluid$, T=T_film, P=101.3) mu=Viscosity(Fluid$, T=T_film) nu=mu/rho T_film=1/2*(T_s+T_infinity) "ANALYSIS" Re=(Vel*Convert(km/h, m/s)*L)/nu "We use combined laminar and turbulent flow relation for Nusselt number"
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Unformatted text preview: Nusselt=(0.037*Re^0.8-871)*Pr^(1/3) h=k/L*Nusselt A=height*L Q_dot_conv=h*A*(T_s-T_infinity) Vel [km/h] Q conv [W] 10 1924 15 2866 20 3746 25 4583 30 5386 35 6163 40 6918 45 7655 50 8375 55 9081 60 9774 65 10455 70 11126 75 11788 80 12441 T ∞ [C] Q conv [W] 0 15658 0.5 14997 1 14336 1.5 13677 2 13018 2.5 12360 3 11702 3.5 11046 4 10390 4.5 9735 5 9081 5.5 8427 6 7774 7-5...
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This note was uploaded on 01/22/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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