نتایج جستجو برای: mesh contraction

تعداد نتایج: 102445  

Journal: :Journal of Multimedia 2010
Shixue Zhang Jinyu Zhao

In computer graphics, investigation has been made in many years in LOD (Level of Detail) models generation to alleviate the workload of visualization processing. However, most of the existing algorithms only focus on static models, and very little works are to deal with animation models. In this paper, we propose a feature aware method for generating multiresolution animation models. By the met...

Journal: :J. Comput. Physics 2007
Alexei Y. Poludnenko Alexei M. Khokhlov

We present the method for computation of fluid flows characterized by the large degree of expansion/contraction and in which the fluid velocity is dominated by the bulk component associated with the expansion/contraction and/or rotation of the flow. We consider the formulation of Euler equations of fluid dynamics in a homologously expanding/contracting and/or rotating reference frame. The frame...

Journal: :Computer methods in biomechanics and biomedical engineering 2011
M P M Pato N J G Santos P Areias E B Pires M de Carvalho S Pinto D S Lopes

The diaphragm is a muscular membrane separating the abdominal and thoracic cavities, and its motion is directly linked to respiration. In this study, using data from a 59-year-old female cadaver obtained from the Visible Human Project, the diaphragm is reconstructed and, from the corresponding solid object, a shell finite element mesh is generated and used in several analyses performed with the...

2001
Weizhu Bao

We consider an economical bilinear rectangular mixed finite element scheme on regular mesh for generalized Newtonian flows, where the viscosity obeys a Carreau type law for a pseudo-plastic. The key issue in the scheme is that the two components of the velocity and the pressure are defined on different meshes. Optimal error bounds for both the velocity and pressure are obtained by proving a dis...

Journal: :IJHPCA 1999
Chris Walshaw Mark Cross Ralf Diekmann Frank Schlimbach

Multilevel algorithms are a successful class of optimisation techniques which address the mesh partitioning problem. They usually combine a graph contraction algorithm together with a local optimisation method which refines the partition at each graph level. To date these algorithms have been used almost exclusively to minimise the cut-edge weight in the graph with the aim of minimising the par...

Journal: :J. Computational Applied Mathematics 2015
Puyin Chen Jianguo Huang Huashan Sheng

Numerical solutions of Navier-Stokes equations play fundamental roles in scientific computing and fluid mechanics. In this talk, I am going to present some Uzawa-type iterative methods for solving the steady incompressible Navier-Stokes equations discretized by mixed element methods. Compared with most existing iterative methods, these methods require no numerical solution of any saddle-point s...

Journal: :international journal of maritime technology 0
amir nikseresht department of mechanical & aerospace engineering, shiraz university of technology, shiraz, iran hossein ghazizade-ahsaee department of mechanical & aerospace engineering, shiraz university of technology, shiraz, iran

in this research, numerical simulation of a symmetric impact of a 2-d wedge, considering dynamic equations in two-phase flow is taken into account. the two-phase flow around the wedge is solved based on finite volume method and volume of fluid (vof) scheme. the dynamic mesh model is used to simulate dynamic motion of the wedge, thereby the effects of different dynamic meshes in both structured ...

Journal: :journal of mechanical research and application 2010
bahram zareyan massoud mirzaei

a fundamental topic in computational fluid dynamics is the role of coordinate particularly for searching optimized coordinates. the objective of this study is the numerical modeling of supersonic flows using a new coordinate system i.e. unified coordinate system (ucs) uses moving mesh with motionless viewing window technique. ucs has an advantage over traditional coordinate systems (eulerian an...

Journal: :SIAM Journal on Scientific Computing 2018

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