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基于流固耦合的直接虚拟区域法离散δ函数研究
  • ISSN号：1000-5862
  • 期刊名称：《江西师范大学学报：自然科学版》
  • 时间：0
  • 分类：O35[理学—流体力学;理学—力学]
  • 作者机构：[1]广东技术师范学院计算机科学系,广东广州510665, [2]华南理工大学机械与汽车工程学院,广东广州510006
  • 相关基金：国家自然科学基金（50930005）; 广东省科技计划（2014KQNCX175,2013B090600022）; 广州市科技计划（201508010045）资助项目
作者： 吴世枫[1,2], 简弃非[2]
关键词： 流固耦合, 直接虚拟区域法, 离散δ函数, 颗粒沉降, fluid-structure interaction, direct fictitious domain method, discrete delta function, free settling of parti cles
中文摘要：

研究直接虚拟区域法中欧拉点和拉格朗日点上速度、虚拟力等物理量的交换函数在流固耦合计算中的应用.通过直接虚拟区域法中运用不同类型和收敛阶的离散δ函数,对颗粒在液体中自由沉降的流固耦合问题进行分析,得出了选择直接虚拟区域法中离散δ函数的原则.根据欧拉网格特点选择δh^1（r）函数和拉格朗日网格特点选择δh^2（r）函数,率先提出了δh^1（r）≠δh^2（r）的新构造方法,使直接虚拟区域法能更加精确和高效地模拟出颗粒在流体中自由沉降这一重要问题,并通过了数值试验论证.

英文摘要：

The exchange functions of physical quantities such as velocity,virtual force at the Euler point and Lagrange point are applied to the fluid-structure interaction in direct fictitious domain method in this paper. By using different types and convergence order of the discrete δ functions,fluid-structure interaction problems of sedimentation of a circular particle in liquid are analyzed,and the new method of the discrete δ function is obtained. According to the Euler characteristics of grids select δh~1（ r） function and Lagrange grids select δh~2（ r） function,a new construction method of δh~1（r）≠δh~2（r） is proposed,which makes the direct fictitious domain method more accurate and more efficient simulation of particle＇s sedimentation in liquid,and through the numerical experiments demonstrate.

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期刊信息
  • 《江西师范大学学报：自然科学版》
  • 北大核心期刊（2011版）
  • 主管单位:江西师范大学
  • 主办单位:江西师范大学
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  • 地址：南昌市紫阳大道99号
  • 邮编：330022
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  • 电话：0791-88506814
  • 国际标准刊号：ISSN：1000-5862
  • 国内统一刊号：ISSN：36-1092/N
  • 邮发代号:44-56
  • 获奖情况:
  • 2009年中国高等学校自然科学学报研究会颁发“全国...,2009年被评为：第四届华东地区优秀期刊奖”,2008年教育部科技司授予“第2届中国高校优秀科技...,2008年江西省新闻出版局授予“第3届江西省优秀期...,2004年教育部科技司授予“全国高校优秀科技期刊二...
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  • 被引量:5205