Unstructured Meshes
Mostrando 25-33 de 33 artigos, teses e dissertações.
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25. An edge-based unstructured finite volume procedure for the numerical analysis of heat conduction applications
In recent years, there has been a significant level of research on the application of unstructured mesh methods to the simulation of a variety of engineering and scientific problems. Great progress has been achieved in such area and one of the most successful methodologies consists on the use of the Finite Volume Method (FVM). The unstructured FV formulation
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-06
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26. SoluÃÃo numÃrica da equaÃÃo de difusÃo de calor em geometrias tridimensionais
This work presents a numeric formulation for the solution of the heat transfer equation with finite volume method (FVM) using forward Euler explicit time integration. The FVM was used because it satisfies the conservation principle, both locally as globally, since it is derived directly of the laws of conservation in the integral form. Also the FVM is well a
Publicado em: 2004
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27. "Simulação do processo de moldagem por injeção 2D usando malhas não estruturadas" / Simulation of the 2D Injection Molding Process Using Unstructured Meshes
Moldagem por injeção é um dos mais importantes processos industriais para produção de produtos plásticos finos. Esse processo é dividido essencialmente em quatro estágios: plastificação, preenchimento, empacotamento e resfriamento. O escoamento de um fluido caracterizado por alta viscosidade em uma cavidade estreita é um problema tipicamente encon
Publicado em: 2004
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28. MULTI-RESOLUTION FOR VISUALIZATION OF NATURAL OIL RESERVOIRS / MULTI-RESOLUÇÃO PARA A VISUALIZAÇÃO DE RESERVATÓRIOS NATURAIS DE PETRÓLEO
Current flow-simulation meshes of natural oil reservoirs (NOR) are composed of hundreds of thousands of hexahedral cells. The visualization of the geometry of these cells superimposed with color attributes to represent properties and flow results requires the rendering of an unstructured mesh of millions of triangles. Current graphics hardware does not allow
Publicado em: 2002
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29. 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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30. O metodo de Galerkin descontinuo com difusividade implicita e h-adaptabilidade baseada em tecnicas Wavelet
In this work an inovative technique is presented for the numerical approximation of conservation laws on unstructured meshes. The numerical scheme uses a discontinuous piecewise polynomial approximation with hadaptivity. The self-adaptive h-refinement strategy uses a regularity assessment of the solution based on wavelet techniques. This strategy determines
Publicado em: 2002
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31. 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
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32. Numerical simulation of a rocket motor with chemical reaction flow / Simulação numérica do escoamento em um motor foguete com reação química
This work presents a numerical simulation of the flow field in a propellant rocket engine chamber and exit nozzle using techniques to allow the results to be taken as starting points for designing those propulsive systems. This was done using a finite volume method simulating the different flow regimes which usually take place in those systems. As the flow f
Publicado em: 2000
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33. Fast methods for the Eikonal and related Hamilton– Jacobi equations on unstructured meshes
The Fast Marching Method is a numerical algorithm for solving the Eikonal equation on a rectangular orthogonal mesh in O(M log M) steps, where M is the total number of grid points. The scheme relies on an upwind finite difference approximation to the gradient and a resulting causality relationship that lends itself to a Dijkstra-like programming approach. In
The National Academy of Sciences.