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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

APPLICATION OF PARAMETRIC SURFACE REPRESENTATION TO EVALUATING FORM FACTORS AND LIKE QUANTITIES

DOI: 10.1615/ICHMT.2004.RAD-4.80
10 pages

K. G. Terry Hollands
Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada

Resumo

Mathematical software packages like Mathcad and Mathematica have now reached the point where they can be routinely used to evaluate multiple integrals like the ones that arise in form factor evaluation, and this provides a new mechanism for form factor evaluation. On the other hand, before starting such numerical evaluation one must first construct the definite integral, and this is not always straightforward. The present paper demonstrates how representing the surfaces parametrically simplifies the construction of the integral and provides the basis for a standardized procedure. The paper gives a catalogue of parametric representations of some typical surfaces in arbitrary orientations and locations, and demonstrates the use of the catalogue on some sample problems.

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