检索结果-南通市图书馆

LOCAL pressure correction FOR THE STOKES SYSTEM

Journal of Computational Mathematics 2020年第1期38卷 125-141页

作者： Malte Braack Utku Kaya Mathematical Seminar University of KielGermany

pressure correction methods constitute the most widely used solvers for the timedependent Navier-Stokes *** are several different pressure correction methods,where each time step usually consists in a predictor step for a non-divergence-free velocity,followed by a Poisson problem for the pressure(or pressure update),and a final velocity correction to obtain a divergence-free vector *** some situations,the equations for the velocities are solved explicitly,so that the numerical most expensive step is the elliptic pressure *** here propose to solve this Poisson problem by a domain decomposition method which does not need any communication between the ***,this system is perfectly adapted for parallel *** show under certain assumptions that this new scheme has the same order of convergence as the original pressure correction scheme(with global projection).Numerical examples for the Stokes system show the effectivity of this new pressure correction *** convergence order O(k^2)for resulting velocity fields can be observed in the norm l^2(0,T;L^2(Ω)).

关键词： Stokes system Navier-Stokes pressure correction Finite elements

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

Influence of solar wind dynamic pressure on geomagnetic Dst index during various magnetic storms

引用

Science China(Technological Sciences) 2011年第6期54卷 1445-1454页

作者： ZHAO Hong ZONG QiuGang WEI Yong WANG YongFu Institute of Space Physics and Applied Technology Peking University Beijing 100871 China Center for Atmospheric Research University of Massachusetts Lowell MA 01854-3629 USA

The Dst index,designed as a proxy of ring current intensity,is known to be also affected by other magnetospheric current systems,*** *** pressure-corrected Dst index is obtained by removing the effects of the solar wind dynamic pressure and the quiet time ring ***,all previous studies treated the correction coefficient as an averaged parameter for storms of different *** this paper,based on the Burton's equations and employing two independent methods,we will show a positive correlation between pressure-correction coefficient b and the intensity of the *** divided our storm database(872 storms in total) into three categories according to the intensity of *** order to improve the accuracy of calculating,we also used the higher-resolution SYM-H index data instead of Dst index to compute the corrected Dst index during different ***,we are able to provide corrected magnetic storm index with high-time resolution(-1 min).

关键词： corrected Dst index pressure correction geomagnetic storms with different intensity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Staggered Grid Method for Solving Incompressible Flow on Unstructured Meshes

引用

Computer Modeling in Engineering & Sciences 2020年第5期123卷 509-523页

作者： Huawen Shu Minghai Xu Xinyue Duan Yongtong Li Yu Sun Ruitian Li Peng Ding College of New Energy China University of Petroleum(East China)Qingdao266580China

A finite volume method based unstructured grid is presented to solve the two dimensional viscous and incompressible *** method is based on the pressure-correction concept and solved by using a semi-staggered grid *** computational procedure can handle cells of arbitrary shapes,although solutions presented in this paper were only involved with triangular and quadrilateral *** pressure or pressure-correction value was stored on the vertex of *** mass conservation equation was discretized on the dual cells surrounding the vertex of primary cells,while the velocity components and other scale variables were saved on the central of primary *** the semi-staggered arrangement can’t guarantee a strong coupling relationship between pressure and velocity,thus a weak coupling relationship leads to the oscillations for pressure and *** order to eliminate such an oscillation,a special interpolation scheme was used to construct the pressure-correction *** results of several viscous flow problems show good agreement with the analytical or numerical results in previous *** semi-staggered grid method can be applied to arbitrary shape elements,while it has the most efficiency for triangular cells.

关键词： Staggered grid incompressible flow pressure correction finite volume method

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

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

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：