Thermodynamics HW Solutions 704

Thermodynamics HW Solutions 704 -...

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Chapter 9 Natural Convection "T_infinity=35 [C], parameter to be varied" L=0.0045 "[m]" D=0.004 "[m]" epsilon=0.1 T_surr=T_infinity-10 "[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 beta=1/(T_film+273) T_film=1/2*(T_s+T_infinity) sigma=5.67E-8 "[W/m^2-K^4], Stefan-Boltzmann constant" g=9.807 "[m/s^2], gravitational acceleration"
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Unformatted text preview: "ANALYSIS" delta=D Ra=(g*beta*(T_s-T_infinity)*delta^3)/nu^2*Pr Nusselt=(0.6+(0.387*Ra^(1/6))/(1+(0.559/Pr)^(9/16))^(8/27))^2 h=k/delta*Nusselt A=pi*D*L+pi*D^2/4 Q_dot=h*A*(T_s-T_infinity)+epsilon*A*sigma*((T_s+273)^4-(T_surr+273)^4) T [C] T s [C] 10 159.9 12 161.8 14 163.7 16 165.6 18 167.5 20 169.4 22 171.3 24 173.2 26 175.1 28 177 30 178.9 32 180.7 34 182.6 36 184.5 38 186.4 40 188.2 9-5...
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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