【摘要】 在研究石油渗流时,经常涉及到差分格式问题。本文给出了确定差分格式逼近阶的原则,引出了能够反映格式逼迫精度与步长比之间的函数关系;从三层含参数差分格式出发,用“选配参数法”构造了较完整的一组差分格式。更多还原

【Abstract】 <ABSTRACT>More often, the differenc scheme problems will be covered in the study of oil flow through porous medium. In the paper, the rules for determining the approaching steps of difference form are proposed, and a function relation expressing the ratio of the difference scheme approaching accuracy to steps is derived. Supplying from the difference scheme for tri-layers parameters, a set of more perfect difference scheme have been established adopting the trial-and-error method, for parametev selection.更多还原