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，对一头站立的猪对与其相邻的同重猪的辐射构型因子进行数值计算。为了获得基于猪体型的配置因子，以活重分别为27、65和88 kg的3只站面模型为研究对象。这些多面体表面模型是三维图形猪，具有许多表面安装的三角形斑块。一个新的FORTRAN程序被开发出来。该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，计算出当相邻清管器绕垂直轴以15°的间隔从0°到360°旋转时的配置因子，该轴的中心为体宽、体高和体长的中点。以猪的体重和相邻猪的方位角为参数，以猪与相邻猪之间的距离为函数，给出了确定构型因素的图形。并以距离为参数，以图形形式给出了构型因子与相邻清管器旋转角度的函数关系。通过数值计算，明确了构型因素对距离、方位角和转角的影响规律。

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.