Radiation configuration factors of a pig to a adjoining pig computed numerically by using computer graphics and numerical methods

本研究的目的是利用计算机图形学和数值积分方法数值计算一只站立的猪对与它重量相同的相邻猪的辐射构型因子。为了获得基于猪体型的形态因子，以体重分别为27、65和88 kg的3个站立表面模型为研究对象。这些多面体表面模型是由许多表面镶嵌的三角形块组成的三维图形模型，编制了一个新的FORTRAN程序。当相邻清管器围绕通过其中心（即主体宽度的中点）的垂直轴以15°间隔从0 °旋转至360°时，程序能够以清管器与相邻清管器之间的距离以及相邻清管器与清管器的方位角为参数计算配置系数。确定猪的形态因子的图形是猪与相邻猪之间的距离、猪的体重和相邻猪的方位角的函数，参数以距离为参数，以相邻清管器旋转角为函数，给出了结构因子的图示，并从数值计算结果中阐明了结构因子对距离、方位角和旋转角的特性。

The purpose of this investigation was to present radiation configuration factors of a standing pig to an adjoining pig with the same weight as it which were numerically calculated by using computer graphics and numerical integration methods. In order to obtain the configuration factors based on the pig body shapes, three standing surface-models with live weights of 27, 65 and 88 kg were used as subjetcs. These polyhedric surface-models were three-dimensional graphic pigs with many surface-mounted triangular patches.A new FORTRAN program was developed. The program was able to compute the configuration factors with the distance between the pig and the adjoining pig and the azimuth angle for the adjoining pig to the pig as parameters when the adjoining pig rotated from 0 to 360° at 15° intervals around a vertical axis through its center that was the midpoints of the body width, body height and body length.The figures for determining the configuration factors were presented as a function of the distance between the pig and the adjoining pig with the pig body weight and the azimuth angle for the adjoinig pig as parameters. And the configuration factors were also presented in graphical form as a function of the rotation angle for the adjoining pig with the distance as a parameter.The characterisics of the configuration factors to the distance, the azimuth angle and the rotation angle were clarified from the results of these numerical computing.