We describe a domain decomposition algorithm for use in the parallel adaptive meshing paradigm of Bank and Holst. Our algorithm has low communication , makes extensive use of existing sequential solvers, and exploits in several important ways data generated as part of the adaptive meshing paradigm. Numerical examples illustrate the effectiveness of the procedure. In [4, 5], we introduced a gene...

Gear wear is unavoidable and results in vibrations decreased performance a planetary gear system. In this work, the phenomenon of teeth surface dynamic responses mechanism are investigated through computational methodology. Dynamic presented by considering effects. First, model dynamics established nonlinear stiffness friction surfaces. The then based on Archard’s model. Further, coupling betwe...

A computational fluid dynamics (CFD) code has been combined with a genetic algorithm (GA) to perform a two-dimensional drag minimization on the base region of tractor trailers. Few studies have been conducted with CFD driven by a GA due to extensive run times and the general non autonomous characteristics of meshing a suitable CFD geometry. This study solves the two-dimensional Reynolds-average...

We explore the current capabilities of the recently released Myricom X2OOO witch, using MPICH over the GM communication layer; for message passing on a 2-way SMP Pentium III Beawulf-Class cluster: Performance measurements on the network indicate that data transfer rates of appmximatety 190 Mbyteds for ping-pong tests, and 24OMbyteds forfill-duplex exchange tests, can be achieved for messages as...

We present a new method for adaptive surface meshing and triangulation which controls the local level-of-detail of the surface approximation by local spectral estimates. These estimates are determined by a wavelet representation of the surface data. The basic idea is to decompose the initial data set by means of an orthogonal or semi-orthogonal tensor product wavelet transform (WT) and to analy...

Generating accurate volume meshes from segmented image volumes is important in certain medical applications. One application is finite element analysis (FEA) for orthopaedic pre-operative planning. The resulting FEA models can be used in patient-specific, bio-mechanical simulations and implants positioning. Currently available software packages for volume meshing of segmented data can generate ...

This short report describes a preliminary study of a method computing meshes of the standard hyperbolic octagon that respects its symmetries. A prototype software was written, using the 2D meshing package of the CGAL library [1, 10] and a software computing hyperbolic triangulations, currently under development [4]. Key-words: Hyperbolic geometry, Poincaré disk, Schwarz triangle, mesh ∗ This wo...

Decomposing the volume bounded by a closed surface using simple cells is a key step in many applications. Although tetrahedral meshing is well-established with several successful implementations, many research questions remain open for polyhedral meshing, which promises significant advantages in some contexts. Unfortunately, current approaches to polyhedral meshing often resort to clipping cell...

A parametric meshing technique is presented with special emphasis to singularities in the parametric mapping. Singularities are locations where the parametric mapping is highly distorted or even singular. In a NURBS context, this arises when control points are clustered into the same location in three dimensions. Limitations of parametric plane meshing in this context are highlighted, and zeroa...