吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1281-1287.doi: 10.13229/j.cnki.jdxbgxb201504037

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多相流数值模拟中复杂地质体网格剖分实现技术

杨艳林, 靖晶, 杨志杰, 许天福, 王福刚   

  1. 吉林大学 地下水资源与环境教育部重点实验室,长春 130021
  • 收稿日期:2014-04-08 出版日期:2015-07-01 发布日期:2015-07-01
  • 通讯作者: 王福刚(1975-),男,教授.研究方向:水文地质与环境地质.E-mail:wangfugang@jlu.edu.cn
  • 作者简介:杨艳林(1984-),男,博士研究生.研究方向:多相流多组分数值模拟与程序开发.E-mail:yangyanlinjida@gmail.com
  • 基金资助:
    中国地质调查局工作项目(12120113006300)

Grid subdivision technology for multiphase flow simulation with complex geological condition

YANG Yan-lin, JING Jing, YANG Zhi-jie, XU Tian-fu, WANG Fu-gang   

  1. Key Laboratory of Groundwater Resources and Environment,Ministry of Education, Jilin University, Changchun 130021,China
  • Received:2014-04-08 Online:2015-07-01 Published:2015-07-01

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摘要： 考虑到复杂地质体的网格化剖分建模技术对多相流体数值模拟精准度的影响,提出了基于布点法构建任意多边形、任意约束的PEBI(Perpendicular bisection)多约束、交互式网格剖分实现技术与网格生成算法。网格生成过程包括五个方面:布点;三角剖分;查找不合格三角形,调整点布局;生成泰森多边;进行拓扑重构,生成二维、三维PEBI网格。剖分过程中将直井、水平井、断层等各种约束分别概化为点、线、区约束,基于泰森多边形的拓扑重构,完成PEBI网格的生成。将剖分算法耦合到作者前期开发的可视化建模软件TOUGHVISUAL上,并应用于几种典型复杂情况下地质体网格剖分建模,应用结果显示了本文方法的科学实用性和操作简便性。

关键词: 计算机应用, PEBI网格, 布点方法, 三角剖分

Abstract: Under complex geological condition, grid subdivision technology influences the accuracy of multiphase flow simulation. To meet the need of grid subdivision for multiphase flow simulation, a new algorithm is proposed to construct Perpendicular Bisection (PEBI) mesh of arbitrary shape with any constraints. This proposed algorithm for generating 2D and 3D PEBI grid includes five steps, e.g. point layout, triangle subdivision, unqualified triangles identification and point layout adjustment, Thiessen polygon generation, and topology reconstruction. In this process, various constraints (vertical wells, horizontal wells and faults) are reduced to point constraints, line constraints and area constraints, respectively. To provide a flexible way of arranging the point location, several common methods were expounded. The PEBI grid was created base on Thiessen polygon topology reconstruction. The proposed algorithm was applied to PEBI grid generation of several typical complicated geological conditions. The results demonstrate the feasible, simple and flexible characteristics of the proposed algorithm.

Key words: computer application, PEBI grid, distribution approach, triangular subdivision

中图分类号: 

  • TP391
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