Summary
The radiation configuration factors of a pig are essential for evaluating radiation exchange rate between the pig body and surrounding objects. In this study, a surface-model was used in order to obtain the configuration factors based on the pig body shape. The surface-model was a three-dimensional graphic pig with 8838 surface-mounted tri-angullar patches. This polyhedric surface-model had been generated from data obtained by three-dimensional shape measurement of a stuffed and standing pig with a live weight of 65 kg. The configuration factors of the surface-model pig to rectangular planes were numerically calculated by computer graphics and the law of solid-angle projection. The method of numerical integration was also used to calculate them.HomePage
The percentage errors of calculated configuration factors were estimated to be less than 1% by the law of summation for configuration factors and the law of propagation of errors. The figures for determining configuration factors of a 65 kg pig to rectangular planes on the wall or the ceiling were presented as a function of one side length in the plane with the other side length and the normal distance between the plane and the pig as paremeters. The diagrams for configuration factors to rectangular planes on the floor in direct contact with or below the bases of the hooves were also presented in the same way. The maximum configuration factor diference between a 27 (reported in the previous papers) and a 65 kg pigs was about ten percent for the same plane.Keywords: 65 kg pig, surface-model, numerical calculation, radiation configuration factor, wall, ceiling, floor