Sas ip inc 1253 vm114 temperature response to

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Unformatted text preview: = 25°F Analysis Assumptions and Modeling Notes Since the problem is axisymmetric, only a one-element sector is needed. A small angle Θ = 15° is used for approximating the circular boundary with a straight-side element. Nodal coupling is used to ensure circumferential symmetry. Automatic time stepping is used. The initial integration time step (6/40 = 0.15 hr) is based on ≈ δ2/4 α, where δ is the element characteristic length (0.0555 ft) and α is the thermal diffusivity (k/γc = 0.005 ft2/hr). POST1 is used to extract results from the solution phase. ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–249 VM111 Results Comparison Time = 6 hr Target[1] ANSYS Ratio T, °F 28.0 28.66 1.024 1. 1–250 Based on graphical estimates. ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. VM112: Cooling of a Spherical Body Overview Reference: F. Kreith, Principles of Heat Transfer, 2nd Printing, International Textbook Co., Scranton, PA, 1959, pg. 143, ex. 4-5. Analy...
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