检索结果-内蒙古大学图书馆

International Conference on Frontiers of Mechanical Engineering and Materials Engineering (MEME 2012)

作者： Gong, Haijun Liu, Yang Fan, Xueyi Xu, Daming Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Heilongjiang Peoples R China Harbin Normal Univ Sch Phys & Elect Engn Harbin 150301 Heilongjiang Peoples R China

ISBN: (纸本)9783037854419

For a clear and comprehensive opinion on segregated simple algorithm in the area of computational fluid dynamics (CFD) during liquid processing of materials, the most significant developments on the simple algorithm and its variants are briefly reviewed. Subsequently, some important advances during last 30 years serving as increasing numerical accuracy, enhancing robustness and improving efficiency for Navier-Stokes (N-S) equations of incompressible fluid flow are summarized. And then a so-called Direct-simple scheme proposed by the authors of present paper introduced, which is different from simple-like schemes, no iterative computations are needed to achieve the final pressure and velocity corrections. Based on the facts cited in present paper, it conclude that the simple algorithm and its variants will continue to evolve aimed at convergence and accuracy of solution by improving and combining various methods with different grid techniques, and all the algorithms mentioned above will enjoy widespread use in the future.

关键词： incompressible flow Navier-Stokes equation simple-like algorithm numerical simulation CFD

来源：评论

学校读者我要写书评

暂无评论

Comparison of different solution algorithms for collocated method of MCIM to calculate steady and unsteady incompressible flows on unstructured grids

引用

COMPUTERS & FLUIDS 2011年第1期46卷 94-100页

作者： Alisadeghi, H. Karimian, S. M. H. Amir Kabir Univ Technol Dept Aerosp Engn Tehran Iran

In this paper, the collocated method of MCIM (Mass Corrected Interpolation Method) is employed for solving two-dimensional incompressible flows on unstructured grid systems. A control-volume-based finite element (CVFEM) approach has been taken in which conservation equations are formed for each control volume throughout the solution domain. In this study, three different algorithms are proposed and investigated. In the first algorithm a fully coupled formulation is used, however in the second algorithm a segregated approach without pressure correction is employed. In the third solution algorithm, the scheme of MCIM is implemented to simple-like segregated algorithm. The linear system of equations obtained in these algorithms is solved using a direct sparse solver. The accuracy and performance of the proposed algorithms are demonstrated by solving different steady and unsteady benchmark problems. (C) 2010 Elsevier Ltd. All rights reserved.

关键词： Incompressible flow Collocated unstructured grid Fully coupled Segregated algorithm simple-like algorithm

来源：评论

学校读者我要写书评

暂无评论

A NUMERICAL-METHOD FOR ACCELERATING THE RATE OF CONVERGENCE OF THE simple-like algorithm FOR FLOW-THROUGH A THIN

引用

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS 1994年第10期19卷 889-903页

作者： WEN, X INGHAM, DB Department of Applied Mathematical Studies University of Leeds Leeds LS2 9JT U.K.

The control volume, finite difference method and the k-epsilon turbulence model are employed in a numerical simulation of the turbulent fluid flow both outside and inside a blunt cylindrical sampler which houses a paper filter in its chamber. The presence of a paper filter, which has a very large resistance, results in a large pressure drop across the filter and this causes difficulties in making the simple or the simpleC scheme converge. In order to improve the rate of convergence of the simple-like algorithm when the resistance of the filter is very large, an average pressure correction formula is proposed. Based on global mass conservation, a line average pressure correction for the paper filter is derived using a modified Darcy law for a porous medium. A combination of this formula and the simple-like algorithm can rapidly build up the pressure drop across the filter and hence dramatically improve the rate of convergence of the iterative scheme. Comparisons of the convergence histories and the numerical results for the fluid flow when using simple and simpleC with the average pressure correction method show that the average pressure correction method for dealing with the paper filter significantly accelerates the rate of convergence of the iterative scheme.

关键词： simple-like algorithm AVERAGE PRESSURE CORRECTION PAPER FILTER TURBULENT FLOW SAMPLER

来源：评论

学校读者我要写书评

暂无评论

A NEW METHOD FOR ACCELERATING THE RATE OF CONVERGENCE OF THE simple-like algorithm

引用

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS 1993年第5期17卷 385-400页

作者： WEN, X INGHAM, DB Department of Applied Mathematical Studies University of Leeds Leeds LS2 9JT U.K.

A pressure correction formula is proposed for the simple-like algorithm in order to improve the rate of the convergence when solving laminar Navier-Stokes equations when there is rapidly varying pressure. Based on global mass conservation, a line average pressure correction is derived by integration of the momentum equation for approximate one-dimensional flow. The use of this formula with the simple-like algorithm can rapidly build up the pressure distribution in the region where the pressure undergoes a very large change, which normally causes the rate of convergence of the simple or the simpleC schemes to be slow. In order to illustrate the technique, the performances of simple and of simpleC with the average pressure correction are investigated for axisymmetric flow past and through a sampler. A comparison of these two techniques shows that the average pressure correction proposed in this paper significantly accelerates the rate of convergence.

关键词： simple-like algorithm AVERAGE PRESSURE CORRECTION SAMPLER FLOWS

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：