Chapter 4 Transient Heat Conduction4-40ELong cylindrical steel rods are heat-treated in an oven. Their centerline temperature when they leave the oven is to be determined. Assumptions1Heat conduction in the rods is one-dimensional since the rods are long and they have thermal symmetry about the center line. 2The thermal properties of the rod are constant. 3The heat transfer coefficient is constant and uniform over the entire surface. 4 The Fourier number is τ> 0.2 so that the one-term approximate solutions (or the transient temperature charts) are applicable (this assumption will be verified). PropertiesThe properties of AISI stainless steel rods are given to be k = 7.74 Btu/h.ft.°F, α= 0.135 ft2/h. Analysis
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