The final time of 005 hr 180 sec is sufficient for

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Unformatted text preview: ts (LINK34) Input Listing: vm107.dat Test Case A thermocouple is used to measure the temperature Tg of a gas flowing within a duct. The duct wall temperature is Tw and the thermocouple is placed at right angles to the flow. If the conduction effects are negligible, determine the thermocouple reading Tt and the heat flow rate q due to convection and radiation. Figure 107.1 Thermocouple Radiation Problem Sketch Material Properties ε = emissivity = 0.5 h = 11.85 Btu/hr-ft2-°F Stefan-Boltzmann constant[1] = 0.174 x 10-8 Btu/hr-ft2-°R4 1. Loading Tw = 300°F Tg = 1309°F As given in A. J. Chapman, Heat Transfer. Analysis Assumptions and Modeling Notes The temperature offset of 460°F is required to convert the input Fahrenheit temperatures to absolute (Rankine) temperatures. The node locations are arbitrarily selected (coincident). ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–241 VM107 Results Comparison Target ANSYS[1] Ratio Tt, °F 1000.00 999.95 1.000 q, Btu/hr 3661.65 3662.24 1.000 1. 1–242 At n...
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