Thermodynamics HW Solutions 575

Thermodynamics HW - "ANALYSIS" Re=(Vel*Convert(km/h m/s*D/nu Nusselt=0.3(0.62*Re^0.5*Pr^(1/3(1(0.4/Pr)^(2/3)^0.25(1(Re/282000)^(5/8)^(4/5

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Chapter 7 External Forced Convection 7-47 "!PROBLEM 7-47" "GIVEN" D=0.006 "[m]" L=1 "[m], unit length is considered" I=50 "[Ampere]" R=0.002 "[Ohm]" T_infinity=10 "[C]" "Vel=40 [km/h], parameter to be varied" "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)
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Unformatted text preview: "ANALYSIS" Re=(Vel*Convert(km/h, m/s)*D)/nu Nusselt=0.3+(0.62*Re^0.5*Pr^(1/3))/(1+(0.4/Pr)^(2/3))^0.25*(1+(Re/282000)^(5/8))^(4/5) h=k/D*Nusselt W_dot=I^2*R Q_dot=W_dot A=pi*D*L Q_dot=h*A*(T_s-T_infinity) Vel [km/h] T s [C] 10 13.72 15 13.02 20 12.61 25 12.32 30 12.11 35 11.95 40 11.81 45 11.7 50 11.61 55 11.53 60 11.46 65 11.4 70 11.34 75 11.29 80 11.25 7-30...
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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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