Adaptive Mesh Refinement
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. GPU Finite Element Method Computation Strategy Without Mesh Coloring
Abstract A GPU-adapted Finite Element Method (A-FEM) implementation without using a mesh coloring strategy to avoid race conditions is presented. All the elements are simultaneously processed, and the local data is computed and consolidated into the device memory in a new adapted Coordinate Format data structure (a-COO). The comparison between the proposed s
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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2. 3D numerical investigation of mixture formation and combustion in a DISI engine at part-load under stratified operation
This work investigates through numerical simulation, the operation of a big bore direct fuel injection spark ignition engine, at part load under stratified operation. It evaluates fuel-air mixture preparation and combustion process with the adoption of detailed chemical kinetics mechanisms for both Isooctane and Ethanol, and applying adaptive mesh refinement
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2020
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3. Simulação computacional de escoamentos reativos com baixo número Mach aplicando técnicas de refinamento adaptativo de malhas / Computational simulation of low Mach number reacting flows applying adaptive mesh refinement techniques.
It is the main goal of the present work to extend a numerical methodology based on both the use of an adaptive mesh refinement technique (AMR) and the use of a multistep, implicit-explicit time-step strategy (IMEX) to applications involving low Mach number reactive flows. Originally developed for incompressible flows, the Eulerian formulation of that methodo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/06/2012
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4. PARALLEL TOPOLOGICAL SUPPORT FOR FINITE ELEMENT MESHES IN DYNAMIC FRACTURE AND FRAGMENTATION ANALYSES / SUPORTE TOPOLÓGICO EM PARALELO PARA MALHAS DE ELEMENTOS FINITOS EM ANÁLISES DINÂMICAS DE FRATURA E FRAGMENTAÇÃO
Fracture propagation and fragmentation phenomena in solids can be described by Cohesive Zone Models and simulated with the Finite Element Method. Among the computational approaches of recent interest for fracture representation in finite element meshes are those based on cohesive elements. In those approaches, fracture behavior is represented by cohesive ele
Publicado em: 2011
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5. An assessment of unstructured grid finite volume schemes for cold gas hypersonic flow calculations
Abstract: A comparison of five different spatial discretization schemes is performed considering a typical high speed flow application. Flowfields are simulated using the 2-D Euler equations, discretized in a cell-centered finite volume procedure on unstructured triangular meshes. The algorithms studied include a central difference-type scheme, and 1st- and
J. Aerosp. Technol. Manag.. Publicado em: 2009-12
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6. "Simulations of 3D two-phase flows using adaptive methods and phase field models" / "Simulações de escoamentos tridimensionais bifásicos empregando métodos adaptativos e modelos de campo fase"
This is the first work that introduces 3D fully adaptive simulations for a phase field model of an incompressible fluid with matched densities and variable viscosity, known as Model H. Solving numerically the equations of this model in meshes locally refined with AMR technique, we simulate computationally tridimensional two-phase flows. Phase field models of
Publicado em: 2007
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7. Delaunay refinement algorithm to sequential, adaptable meshes and with parallel computing. / Algoritmo de refinamento de Delaunay a malhas seqüenciais, adaptativas e com processamento paralelo.
Este trabalho apresenta o desenvolvimento de um gerador de malha de elementos finitos baseado no Algoritmo de Refinamento de Delaunay. O pacote é versátil e pode ser aplicado às malhas seriais e adaptativas ou à decomposição de uma malha inicial grossa ou pré-refinada usando processamento paralelo. O algoritmo desenvolvido trabalha com uma entrada de
Publicado em: 2007
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8. Detailed Two-Dimensional Numerical Analysis of Multiphase Flows / Análise numérica detalhada de escoamentos multifásicos bidimensionais
The mathematical modeling of multiphase flows involves the interaction between deformable and moving geometries with the fluid in which they are dispersed (immersed). This kind of interaction is present in many practical applications. A common approach to handle these problems is the so called Front-Tracking/Front-Capturing Hybrid Methods. This methodology c
Publicado em: 2007
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9. Detailed Two-Dimensional Numerical Analysis of Multiphase Flows / AnÃlise numÃrica detalhada de escoamentos multifÃsicos bidimensionais
The mathematical modeling of multiphase ows involves the interaction between deformable and moving geometries with the uid in which they are dispersed (immersed). This kind of interaction is present in many practical applications. A common approach to handle these problems is the so called Front-Tracking/Front-Capturing Hybrid Methods. This methodology consi
Publicado em: 2007
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10. Numerical simulation of three-dimensional flows over aerospace configurations.
The objective of this project is to study three dimensional aerodynamic flows over realistic aerospace configurations, such as the first Brazilian Satellite Launcher (VLS) in its first stage flight form. In order to achieve this objective, computational fluid dynamics and three dimensional adaptive mesh refinement techniques are used. The project focus in fi
Publicado em: 2002
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11. EXTRAÇÃO DE MALHAS ADAPTATIVAS EM MULTI-RESOLUÇÃO A PARTIR DE VOLUMES, USANDO SIMPLIFICAÇÃO E REFINAMENTO / MULTIRESOLUTION ADAPTIVE MESH EXTRACTION FROM VOLUMES, USING SIMPLIFICATION AND REFINEMENT
Este trabalho apresenta um método para extração de malhas poligonais adaptativas em multi-resolução, a partir de objetos volumétricos. As principais aplicações da extração de malhas estão ligadas à área médica, dinâmica de fluidos, geociências, meteorologia, dentre outras. Nestas áreas os dados podem ser representados como objetos volumétri
Publicado em: 2002
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12. An unstructured grid approach to the solution of axisymmetric launch vehicle flows.
A study of the flowfield around axisymmetric launch vehicles in different flight conditions and configurations is performed in this work. Particularly, the VLS second stage flight configuration is analyzed considering the case with and without a propulsive jet in the vehicle base. Among the different cases considered for this configuration there are inviscid
Publicado em: 2001