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Showing 1 to 16 of 16 for “"Structured meshes"”.
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Structured meshes: composition and remeshing guided by the Curve-Skeleton
… purely technical, of producing highly irregular meshes that are not optimal for subsequent processing. Converting an unstructured mesh into a more regular and struc- tured model in an automatic way is a challenging task and still open prob- lem. Since structured meshes are useful in different …
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Winslow elliptic smoothing equations extended to apply to general regions of an unstructured mesh
… has traditionally been done using structured meshes but, because of their flexibility with capturing real-world geometry, unstructured meshes are being increasingly utilized. Not surprisingly, techniques that have traditionally been reserved for structured meshes are migrating to …
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Sensitivity study of turbulent flow simulations over a rotating disk
… conducted with several turbulence models using structured meshes. Due to the complex geometry of wind turbines, a flow over an infinite rotating disk is considered in the current paper as a first step. Such flow represents a rotating wind turbine with an infinite number of blades.
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Elastic Mesh Deformation for Internal Flows with Moving Boundaries
… using aspect ratio as a metric, for the 2D unstructured triangular mesh, the element mesh quality showed improvement when the Jacobian-based stiffening method was applied, which involved excluding the determinant of the Jacobian from the stiffness matrix formulation. Similarly, for the 3D …
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Large-scale Geometric Data Decomposition, Processing and Structured Mesh Generation
… geometric data using a polygonal or polyhedral meshes is always the first step of the procedure. The quality of this tessellation often dictates the subsequent computation accuracy, efficiency, and numerical stability. When compared with unstructured meshes, the structured meshes are favored in …
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All Hexahedral Meshing of Multiple Source, Multiple Target, Multiple Axis Geometries Via Automatic Grafting and Sweeping
… for the automatic creation of finite element meshes composed entirely of hexahedra (all-hex) is an active area of research. All-hex meshes are desirable for their characteristic of high accuracy with a low node count. Sweeping is one of the most widely used algorithms for generating all-hex …
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Improved performance of the hPIC particle-in-cell code by incorporating a new non-uniform implicit mesh based on the PUMI infrastructure
Uniform structured meshes are inefficient at capturing the high plasma gradients in a Scrape-Off-Layer (SOL). Especially in the magnetic and electrostatic sheaths forming in front of the material surfaces. The hPIC Particle In Cell code developed previously at UIUC has been modified to incorporate …
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Two-dimensional Euler computations on a triangular mesh using an upwind, finite-volume scheme
… solution of the Euler equations on unstructured, triangular meshes using a flux-difference split, upwind method. The procedure uses a dual mesh system to implement the finite-volume scheme using conserved variables stored at the vertices of the triangles. The vertices of the triangles …
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Recovery Techniques For Finite Element Methods And Their Applications
… polynomials of degree (k + 1) on general unstructured meshes and polynomials of degree (k + 2) on translation invariant meshes. Based on it polynomial preserving property, we can able to prove superconvergence of the proposed method on mildly structured meshes. In addition, we establish the …
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On an Effective Submodeling Procedure for Stresses Determined with Finite Element Analysis
… of our approach is assessed with free and structured meshes, for elements of different orders, and for shape functions and cubic splines or bicubic surfaces for interpolating displacements in boundary conditions. For all these problems, whenever estimates of the boundary-condition errors …
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High performance simulations of yield stress fluids in a structured adaptive mesh refinement framework with embedded boundaries
… spatio-temporal adaptive mesh refinement on structured meshes in this context for the first time. This is achieved through the software framework AMReX, which includes state-of-the-art numerical tools for solving partial differential equations with optimal parallel scaling. The ability to …
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From micro-CT TO A NURBS-based interface-enriched generalized finite element method
… and structures. In most cases, conforming meshes are used to discretize the simulated geometry. However, this traditional method is not efficient in the analysis of complex microstructures, since the shape of most microstructures is quite irregular. Creating a conforming mesh with good …
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Mapping unstructured mesh codes onto local memory parallel architectures
… systems focused upon software which employed structured meshes. Increasingly, many large scale CFD codes are being based upon unstructured meshes. One of the key problems when implementing such large scale unstructured problems on a distributed memory machine is the question of how to …
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High-order hybrid methods using Green's functions and finite elements
… capability of standard FE solutions on structured or semi-structured meshes. Two main areas of application are considered: a new finite-element-based method for N-body calculations and a new high-order method for elliptic interface problems on non-conforming volume meshes. First, the …
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Κίνηση, παραμόρφωση και αλληλεπίδραση φυσαλίδων λόγω βαρύτητας ή/και μεταβολής της πίεσης του περιβάλλοντος ρευστού
Αντικείμενο της παρούσας εργασίας είναι η πρόβλεψη τόσο της κίνησης, αλληλεπίδρασης και παραμόρφωσης δύο φυσαλίδων λόγω μεταβολής της πίεσης στο περιβάλλον ιξώδες υγρό, όσο και της ανοδικής κίνησης μιας φυσαλίδας λόγω άνωσης σε ένα Νευτωνικό ή ιξωδοπλαστικό ρευστό. Για τη μοντελοποίηση των …