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Wednesday, May 20, 2020 | History

2 edition of Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method found in the catalog.

Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method

Nicolas Pierre Chavannes

Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method

by Nicolas Pierre Chavannes

  • 276 Want to read
  • 28 Currently reading

Published by Hartung-Gorre in Konstanz .
Written in

    Subjects:
  • Radio -- Antennas -- Mathematical models,
  • Radio wave propagation -- Mathematical models,
  • Cell phone systems -- Mathematical models,
  • Electromagnetism -- Computer simulation,
  • Finite differences,
  • Time-domain analysis

  • Edition Notes

    StatementNicolas Pierre Chavannes.
    SeriesSeries in microelectronics -- v. 161
    Classifications
    LC ClassificationsTK6565.A6 C44 2002
    The Physical Object
    Paginationxxiv, 203 p. :
    Number of Pages203
    ID Numbers
    Open LibraryOL24012013M
    ISBN 103866280351
    LC Control Number2006483066

    In numerical analysis, adaptive mesh refinement (AMR) is a method of adapting the accuracy of a solution within certain sensitive or turbulent regions of simulation, dynamically and during the time the solution is being solutions are calculated numerically, they are often limited to pre-determined quantified grids as in the Cartesian plane which constitute the computational. Often, critical stresses are limited to one or two small areas of a model. When Global Mesh Refinement is used, the resulting mesh is often finer than necessary because all elements are resized. A more efficient approach is to refine the mesh locally, only where the critical stress regions are. The Local Mesh Refinement command provides a semi-automatic means of performing this targeted mesh.

    paragraph relates of the Mesh-Size Finite Elements Method, that is to say, approximation by piecewise, the second consists introduced Mesh –size refinement objects by models of the SOM, the third consists in modeling a model of the Optimum Adaptation of a Mesh Size by finite Elements [6] and SOM. Simulation results are also available. Mesh refinement and iterative solution methods for finite element computations. Graham F. Carey. Texas Institute for Computational Mechanics, University of Texas. Search for more papers by this author.

    Called adaptive mesh refinement capability, this applied math research by the Lab’s Center for Computational Science and Engineering provides tools for computer modeling to allow researchers to automatically apply their computing resources to the most intriguing problems. The end result is that researchers get better answers at a lower cost. @article{osti_, title = {A control-volume, finite-element method for local mesh refinement in thermal reservoir simulation}, author = {Forsyth, P A}, abstractNote = {This paper describes a control-volume, finite-element technique for coupling coarse grids with local fine meshes. The pressure is treated in a finite-element manner, while the mobility terms are upstream weighted in the.


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Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method by Nicolas Pierre Chavannes Download PDF EPUB FB2

Local Mesh Refinement Algorithms for Enhanced Modeling Capabilities in the Fdtd Method (Series in microelectronics). Find all books from Nicolas Pierre Chavannes. At you can find used, antique and new books, compare results and immediately purchase. Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method By Nicolas Pierre Chavannes Topics: EngineeringAuthor: Nicolas Pierre Chavannes.

Selecting the best mesh refinement option in the FDTD simulation object FDTD MODE Lumerical provides a number of mesh refinement options which can give sub-cell accuracy from a simulation.

The numerical dispersion relation (NDR) of the finite-difference time-domain method in general curvilinear coordinates (FDTD-GCC) is discussed for a two-dimensional (2-D) uniformly skewed mesh. Abstract: An efficient local mesh refinement algorithm, subdividing a computational domain to resolve fine dimensions in a time-domain-finite-difference (TD-FD) space-time grid structure, is discussed.

At a discontinuous coarse-fine mesh interface, the boundary conditions for the tangential and normal field components are enforced for a smooth transition of highly nonuniform held by: Mesh refinement is desirable for an advantageous use of the finite-difference time-domain (FDTD) solution method of Maxwell’s equations, because higher spatial resolutions, i.e., increased mesh.

Schneiders, R.; Debye, J. () Refinement algorithms for unstructured quadrilateral or brick element meshes. Proceedings IMA Workshop on Modeling, Mesh Generation and Adaptive Numerical Methods for Partial Differential Equations.

The resonant behavior of metallic nano-structures is simulated using local mesh refinement of the FDTD method in 3 Dimensions. In this paper, we consider local mesh refinement algorithms and data structures for finite element methods for linear elliptic partial differential equations in the plane.

Quadrilateral and. Delaunay refinement algorithms that unifies the pioneering mesh generation algorithms of L. Paul Chew and Jim Ruppert, improves the algorithms in several minor ways, and most importantly, helps to solve the difficult problem of meshing nonmanifold domains with small angles.

A dynamic local mesh refinement algorithm is proposed to accelerate the speed of local mesh refinement for the finite difference time domain (FDTD) method.

It is desirable to extend the CAC method by using mesh refinement schemes. For example, our previous CAC simulations of brittle fracture show that the coarse-grained domain with hybrid elements satisfactorily predicts local fracture behavior and average stress–strain relation comparable with fully resolved atomistic simulations with only % degrees of freedom of the latter (Deng and Chen.

Mapped meshes cannot be refined locally. If local refinement is applied to a mapped mesh, free meshing will be used to perform the refinement. If refinement of a mapped mesh is required, it is best to clear the original mesh, modify the element size or the number of divisions on the edges, and remesh the model.

Introduction. The finite-element method is now used widely to model sheet forming processes, such as the sheet metal forming used widely in the car industry e.g., the superplastic forming used successfully in the aerospace industry for light complex structures e.g.

and the plastics blow molding used in the polymer industry r, the FEM employed here with highly non-linearity is. FREE MESH GENERATION This method of generation is best suited for models with complicated geometry.

SUPERTAB has this capability. The model is broken down into sub-areas and sub-volumes. On each of the curves of every sub-area and sub-volume the number of elements and their concentrations are selected.

The software then generates a mesh that is. () Adaptive mesh refinement-enhanced local DFD method and its application to solve Navier–Stokes equations.

International Journal for Numerical Methods in Fluids() A stencil adaptive algorithm for finite difference solution of incompressible viscous flows. FREE MESH GENERATION This method of generation is best suited for models with complicated geometry.

SUPERTAB has this capability. The model is broken down into sub-areas and sub-volumes. On each of the curves of every sub-area and sub-volume the number of elements and their concentrations are selected.

A Local Mesh Refinement Algorithm for the Time Domain Finite Difference Method Using Maxwell’s Curl Equations. IEEE Trans. Microwave Theory Tech. 38, – () CrossRef Google Scholar 4. Adaptive Mesh Refinement for Time-Domain Numerical Electromagnetics Costas D. Sarris This monograph is a comprehensive presentation of state-of-the-art methodologies that can dramatically enhance the efficiency of the finite-difference time-domain (FDTD) technique, the most popular electromagnetic field solver of the time-domain form of Maxwell.

Technique based on an Adaptively Refined / Moving Mesh Yaxun Liu, Costas D. Sarris University of Toronto, The Edward S. Rogers Sr. Department of Electrical and Computer Engineering 10 King’s College Road, M5S 3G4 Toronto, Canada, + Abstract — For the first time, the FDTD method enhanced with an adaptive mesh refinement (AMR-FDTD.

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda). In this paper, we consider local mesh refinement algorithms and data structures for finite element methods for linear elliptic partial differential equations in the plane.

Quadrilateral and triangular are treated in a unified fashion. Because we restrict the local refinement to be regular, the resulting finite.A novel adaptive mesh refinement method is proposed.

The novelty of the method lies in using a dual data structure with two trees: A classical one for the computational cells and an extra one dedicated to computational cell faces. This new dual structure simplifies the algorithm, making the method .However, the mesh-refining process may become awkward along the complex geometry of objects.

For unstructured grids, an isotropic mesh-refining method based on h-refinement concept has been proposed. One of the major advantages of this approach is the capability in body-fitting any complicated geometry of objects.