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Unformatted text preview: Click to edit Master subtitle style 8/13/11 Transient Conduction: Cylinders (rods),spheres and Chapter 5 Section 5.6,7 Class 9 8/13/11 What properties do you use? a) Figure out an average temperature b) Look up the properties at that temperature if you can or estimate c) Table A.1 has all the properties at a number of temperatures 8/13/11 Radial Systems • Long Rods or Spheres Heated or Cooled by Convection. 2 / / o o Bi hr k Fo t r α = = 1 1 , Table 5.1 C ζ → 8/13/11 8/13/11 8/13/11 Bessel functions 8/13/11 A long rod of 60 mm diameter and thermophysical properties l = 8000 kg/m3, c = 500 J/kg-K and k = 50 W/m-K is initially at a uniform temperature and is heated in a forced convection furnace maintained at 750 K. The convection coefficient is estimated to be 1000 W/m2-k. What is the centerline temperature of the rod when the surface temperature is 550 K. 8/13/11 A long rod of 60 mm diameter and thermophysical properties l = 8000 kg/m3, c = 500 J/kg-K and k = 50 W/m-K is initially at a uniform temperature and is heated...
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This note was uploaded on 08/13/2011 for the course CHEM 3210 taught by Professor Degrazia during the Fall '10 term at Colorado.

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