Thermodynamics HW Solutions 551

Thermodynamics HW Solutions 551 - and turbulent flow...

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Chapter 7 External Forced Convection 7-23 "!PROBLEM 7-23" "GIVEN" Vel=70 "[km/h], parameter to be varied" w=2.8 "[m]" L=8 "[m]" "q_dot_rad=200 [W/m^2], parameter to be varied" T_infinity=30 "[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 "Reynolds number is greater than the critical Reynolds number. We use combined laminar
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Unformatted text preview: and turbulent flow relation for Nusselt number" Nusselt=(0.037*Re^0.8-871)*Pr^(1/3) h=k/L*Nusselt q_dot_conv=h*(T_s-T_infinity) q_dot_conv=q_dot_rad Vel [km/h] T s [C] 10 64.01 15 51.44 20 45.99 25 42.89 30 40.86 35 39.43 40 38.36 45 37.53 50 36.86 55 36.32 60 35.86 65 35.47 70 35.13 75 34.83 80 34.58 85 34.35 90 34.14 95 33.96 100 33.79 105 33.64 110 33.5 115 33.37 120 33.25 7-13...
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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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