Refined Mesh
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. An Object-Oriented Class Organization for Global-Local Generalized Finite Element Method
Abstract This paper shows and discusses a generic implementation of the global-local analysis toward generalized finite element method (GFEMgl). This implementation, performed into an academic computational platform, follows the object-oriented approach presented by the authors in a previous work for the standard version of GFEM in which the shape functions
Lat. Am. j. solids struct.. Publicado em: 2016-12
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2. Finite Element Method Based Modeling of Resistance Spot-Welded Mild Steel
Abstract This paper deals with Finite Element refined and simplified models of a mild steel spot-welded specimen, developed and validated based on quasi-static cross-tensile experimental tests. The first model was constructed with a fine discretization of the metal sheet and the spot weld was defined as a special geometric zone of the specimen. This model pr
Lat. Am. j. solids struct.. Publicado em: 2016-11
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3. Simulação de um alimentador Venturi em trecho ascendente no transporte pneumático de sólidos
The radial and axial distributions of coarse solids when fed directly in a riser are unknown, despite this type of feeding is very important for drying and preheating of solids during conveying. In this context, this thesis focused on studying the diluted conveying of coarse solids in a riser that was fed by a Venturi feeder in vertical orientation. Experime
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2012
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4. Simulação da propagação de ondas ultrassônicas longitudinais em materiais estruturais aeroespaciais / Simulating the propagation of longitudinal ultrasonic waves in aerospace structural materials
The use of composite materials in the aerospace industry is increasing due to its low ratio between density and mechanical strength. To perform non-destructive testing using ultrasound, it is necessary to know the sound velocity in these materials. It is not always possible to manufacture physical prototypes during the development of a project because of tim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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5. Simulação numérica euleriana de escoamento gás-sólido em riser com dimensões reduzidas aplicando malhas refinadas / Eulerian numerical simulation of gas-solid flows in risers of reduced dimensions applying refined meshes
Dada a complexidade hidrodinâmica de escoamentos gás-sólidos em leitos fluidizados muitas pesquisas têm sido realizadas abordando questões relativas a natureza altamente instável desse processo de fluidização. O conhecimento dessa hidrodinâmica permite estabelecer os parâmetros corretos para reação e transporte de massa em um reator de leito flui
Publicado em: 2008
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6. Sobre a busca de superfícies minimais e seu emprego nas estruturas de membrana. / On finding minimal surfaces and their application to membrane structures.
This dissertation presents a historical review on the theoretical developments on minimal surfaces, highlighting the important analogy between the problems of finding minimal area surfaces and finding membrane surfaces with homogeneous and isotropic stress fields. Some geometric concepts of the parametric surfaces are placed, on the basis of differential geo
Publicado em: 2008
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7. Automatic surface registration using spin-images / Registro automático de superfícies usando spin-image
This work describes a method based on three stages for reconstructing a model from a given set of scanned meshes obtained from 3D scanners. Meshes scanned from different scanners view points have their representation in local coordinate systems. Therefore, for final model reconstruction, an alignment of the meshes is required. The most popular algorithm for
Publicado em: 2007
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8. "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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9. 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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10. Three dimensional flow simulations with the finite element technique over a multi-stage rocket
Aerodynamic flow simulations over the first Brazilian satellite launch vehicle, VLS, during its first-stage flight are presented. The three dimensional compressible flow is modeled by the Euler equations and a Taylor-Galerkin finite element method with artificial dissipation is used to obtain the numerical solution. Transonic and supersonic results for zero
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-06
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11. Smooth surface reconstruction from noisy clouds
We describe a new method for surface reconstruction and smoothing based on unorganized noisy point clouds without normals. The output of the method is a refined triangular mesh that approximates the original point cloud while preserving the salient features of the underlying surface. The method has five steps: noise removal, clustering, data reduction, initi
Journal of the Brazilian Computer Society. Publicado em: 2004-04
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12. Three-dimensional turbulent flow simulations over aerospace configurations.
The main objective of the present research work consists of studying turbulent flows over typical aerospace configurations. In order to accomplish such goal, a numerical tool to simulate 3-D compressible flows is validated and improved. A finite difference method for structured grids, written for general curvilinear coordinates, is used. A centred spatial di
Publicado em: 2002