This article presents a methodology aiming at easing considerably the generation of high-quality meshes for complex three-dimensional (3D) domains. To this end, mesh size field h(x) is computed, taking surface curvatures and geometric features into account. The tuned by five intuitive parameters yields quality arbitrary geometries. Mesh initialized on triangulation domain based discrete medial ...

Experiments tested the ability of newly emerged spiderlings of a black widow spider, Latrodectus hesperus Chamberlin & Ivie (Araneae: Theridiidae), to crawl through brass screen of various mesh size. The purpose was to determine whether immatures of these medically important spiders could be excluded from buildings. In horizontal orientation, black widow spiderlings were able to easily pass thr...

We consider the following meshing problem. Given a control spacing function f(), which speciies the desired element size, how to generate a well-shaped and a well-conformed mesh. Here, well-shaped mesh means that the circumradius-to-shortest-edge-length ratio of the mesh is bounded from above by a constant; well-conformed means that the element size is within a constant factor of f(). Li et. al...

We survey techniques in the Toolkit for Advanced Optimization (TAO) for developing scalable algorithms for mesh-based optimization problems on distributed architectures. We discuss the distribution of the mesh, the computation of the gradient and the Hessian matrix, and the use of preconditioners. We show that these techniques, together with mesh sequencing, can produce results that scale with ...

This paper presents a set of parallel procedures for anisotropic mesh adaptation accounting for mixed element types used in boundary layer meshes, i.e., the presented procedures operate in parallel on distributed boundary layer meshes. The procedures accept anisotropic mesh metric field as an input for the desired mesh size field and apply local mesh modifications to adapt the mesh in order to ...

This paper presents an eecient algorithm to generate a well-shaped and a well-conformed mesh respecting to a given control spacing f(). A control spacing function is used to specify the desired element size. Here, well-shaped mesh means that the circumradius-to-shortest-edge-length ratio of the mesh is bounded from above by a constant; well-conformed means that the element size is within a cons...

Mesh refinement procedures for the solution of three dimensional problems are described. The computational domain is represented by an assembly of tetrahedral elements and the mesh refinement is acheived by the bisection and Rivara methods using an explicit mesh density function coupled with an automatic 3D mesh generator. A couple of benchmark examples is used to compare the performance of bot...

Solvothermal reactions of a predesigned amphiphilic ligand, 4'-tert-butyl-biphenyl-3,5-dicarboxylate (BBPDC), with Zn(NO(3))(2), Co(NO(3))(2), and Cu(NO(3))(2) gave rise to three isostructural mesh-adjustable molecular sieves (MAMSs), MAMS-2, MAMS-3, and MAMS-4, respectively. The three new MAMSs all exhibit temperature-tuned molecular sieving effect. There exists a linear relationship between m...