Browsing by Author "Campo, Antonio"

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    Assessing the Uncertainty in Transient Heat Conduction Within Large Plates, Long Cylinders, and Spheres
    (TAYLOR & FRANCIS INC, 2012) Lira, Ignacio; Campo, Antonio
    Relevant quantities in transient heat conduction within solids include the temperature distribution and the total energy released up to a given time. Expressions for these quantities are well known in the case of large plates, long cylinders, and spheres initially at a uniform temperature and subject to convective boundary conditions. Because the heat transfer coefficient usually is not known accurately, it is of interest to assess how the uncertainty associated with its estimated value propagates into the uncertainties of the local temperatures inside these three bodies and of the total energy released from them. In this paper a calculation procedure in agreement with current international recommendations is developed for this purpose.
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    One-Dimensional Versus Two-Dimensional Behavior of Isachenko's Optimal Straight Fin with Quarter-Circle Profile
    (AMER INST AERONAUT ASTRONAUT, 2012) Campo, Antonio; Celentano, Diego J.
    A study was conducted to investigate the behavior of the 2-D temperature distributions in a straight fin with a quarter-circle profile through the powerful finite element method. The computed numerical 2-D temperatures were post-analyzed to clarify in a natural way the circumstances under which the general 2-D heat equation degraded into a simple quasi 1-D heat equation for modeling Isachenko's optimal straight fin. This realistic interconnectivity was presented in graphs and in a table containing the transverse biot number (Bit). The structured finite element mesh was constructed with three-noded isoparametric triangular elements. Smaller three-noded isoparametric triangular elements were also constructed in the vicinity of the curved surface extending from the fin base to the fin tip for enhanced accuracy. Numerical calculations of the 2-D dimensionless temperatures for representative transverse Bit were performed with an in-house finite element code.