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P dewitt fundamentals of heat transfer john wiley sons

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Unformatted text preview: ectric Solid Elements (SOLID69) Input Listing: vm119.dat Test Case Determine the centerline temperature and the surface temperature Ts of a bare steel wire carrying a current I and having a resistance R. The surface convection coefficient between the wire and the air (at temperature Ta) is h. Also determine the heat dissipation rate q. Figure 119.1 Electrical Wire Problem Sketch ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–265 VM119 Material Properties k = 13 Btu/hr-ft °F h = 5 Btu/hr-ft2-°F R = 0.0001 Ω/ft Geometric Properties ro = 0.375 in = 0.03125 ft Loading Ta = 70°F I = 1000 A Analysis Assumptions and Modeling Notes The problem is solved first using thermal-electric axisymmetric elements (PLANE67) and then using thermalelectric solid elements (SOLID69). A 1 foot axial length is chosen for convenience. Nodal coupling is used to ensure axial symmetry (as well as circumferential symmetry in the case of (SOLID69). The voltage drop per foot is IR = 0.1 vo...
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