检索结果-南通市图书馆

A 2D Staggered Multi-Material ALE Code Using mof interface reconstruction

Numerical Mathematics(Theory,Methods and Applications) 2021年第1期14卷 219-241页

作者： Yibing Chen Junxia Cheng Liang Pan Haihua Yang Heng Yong Xin Yu Institute of Applied Physics and Computational Mathematics BeijingChina School of Mathematical Science Beijing Normal UniversityBeijingChina

Hydrocodes are necessary numerical tools in the fields of implosion and high-velocity impact,which often involve large deformations with changing-topology *** is very difficult for Lagrangian or Simplified Arbitrary Lagrangian-Eulerian(SALE)codes to tackle these kinds of large-deformation problems,so a stag-gered Multi-Material ALE(MMALE)code is developed in this paper,which is the explicit time-marching Lagrange plus remap *** use the Moment Of Fluid(mof)method to reconstruct the interfaces of multi-material cells and present an adaptive bisection method to search for the global minimum value of the nonlinear objective *** keep the Lagrangian computations as long as possible,we develop a ro-bust rezoning method named as Combined Rezoning Method(CRM)to generate the convex,smooth grids for the large-deformation *** the staggered remap phase,we use two methods to remap the variables of Lagrangian mesh to the rezoned *** is the first-order intersection-based remapping method that doesn’t limit the distances between the rezoned and Lagrangian meshes,so it can be used in the applications of wide *** other one is the conservative second-order flux-based remapping method developed by Kucharika and Shashkov[22]that requires the rezoned element to locate in its adjacent old *** results of triple point problem show that the result of first-order remapping method using ALE computations is gradually convergent to that of second-order remapping method using Eulerian computations with the decrease of rezoning,thereby telling us that MMALE computations should be performed as few as possible to reduce the errors of the interface reconstruction and the *** results provide a clear evidence of the robustness and the accuracy of this MMALE scheme,and that our MMALE code is powerful for the large-deformation problems.

关键词： Staggered Lagrangian scheme multi-material ALE mof interface reconstruction large-deformation problems

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Multi-Material CCALE-mof Approach in Cylindrical Geometry

引用

Communications in Computational Physics 2014年第2期15卷 330-364页

作者： Marie Billaud Friess Jerome Breil Pierre-Henri Maire Mikhail Shashkov LUNAM Universite GeMUMR CNRS 6183Ecole Centrale NantesUniversite de Nantes1 rue de la NoeBP 9210144321 Nantes Cedex 3France Univ.Bordeaux CEACNRSCELIAUMR5107F-33400 TalenceFrance CEA CESTA 15 Avenue des Sabli`eresCS 6000133116 Le Barp CedexFrance Los Alamos National Laboratory XCP-4Los AlamosNM 87545USA.

In this paper we present recent developments concerning a Cell-Centered Arbitrary Lagrangian Eulerian(CCALE)strategy using the Moment Of Fluid(mof)interface reconstruction for the numerical simulation of multi-material compressible fluid flows on unstructured grids in cylindrical ***,our attention is focused here on the following ***,we propose a new formulation of the scheme used during the Lagrangian phase in the particular case of axisymmetric ***,the mof method is considered for multi-interface reconstruction in cylindrical ***,a method devoted to the rezoning of polar meshes is ***,a generalization of the hybrid remapping to cylindrical geometries is *** explorations are validated by mean of several test cases using unstructured grid that clearly illustrate the robustness and accuracy of the new method.

关键词： Cell-centered scheme Lagrangian hydrodynamics ALE mof interface reconstruction Rezoning algorithm polar meshes hybrid remapping axisymmetric geometries.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：