数学物理学报 ›› 1999, Vol. 19 ›› Issue (2): 196-205.

• 论文 • 上一篇    下一篇

三维油水运移聚集数值模拟的交替方向格式和分析

  

  1. 山东大学数学研究所 济南 250100
  • 出版日期:1999-05-01 发布日期:1999-05-01

The alternating birection schemes and numerical analysis for three dimensional transport accumulation (oil and water)

  1. (Institute of Mathematics, Shandong University, Jinan 250100)

  • Online:1999-05-01 Published:1999-05-01

摘要:

 研究油气运移聚集史的数值模拟,其数学模型是三维非线性偏微分方程组的初边值问题.我们从实际出发,考虑了重力、毛管力和浮力的作用,同时考虑到三维问题大规模科学和工程计算的特征,提出对流动方程采用大步长的混合元法,而对三维饱和度方程的计算,采用一类交替方向特征有限元法,将其化为连续解三个一维问题,使工程数值计算成为可能.应用张量积计算.负模估计和先验估计理论,得到最佳阶L2误差估计.

关键词: 三维运移聚集, 混合元, 特征有限元, 交替方向, 最佳阶L2 估计

Abstract:

The software for oilgas transport and accumulation is to describe the history of oilgas transport accumulation in basin evolution. It is of great value in rational evaluation of prospecting and defines oil deposit location. The mathematical model can be described as a coupled system of nonlinear partial differential equations with initialboundary value problems. This thesis, from actual conditions such as the effects of gravitation, buoyancy, capillary pressure and the three-dimensional characteristic of largescale scienceengineering computation, puts forward a kind of characteristic finite element alternatingdirection schemes, this is, by dividing it into three continuous one-dimensional problems. By making use tensor product algorithmnegative norm estimate and theory of prior estimates. Optimal order estimates in L2 norm are derived for the error in approximate solutions.

Key words: Threedimensional, Transportaccumulation, Mixedfiniteelements, Characteristicfiniteelements, Alternatingdirection, OptimalorderestimatesinL2

中图分类号: 

  • 65M