High Order Numerical Methods
Mostrando 25-36 de 47 artigos, teses e dissertações.
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25. Minimização da variação do erro de transmissão de pares engrenados atraves da modificação da superficie dos dentes / Minimization of transmission error excitation of gear pairs through tooth surface modification
Noise that comes from geared systems can be annoying, and in some cases unacceptable by users of those systems. Gear noise is dose to pure tone, presents high amplitude, and its frequency is near to most sensitive region of human ear. Transmission error (TE) excitation is recognized as one of the main sources of gear noise and vibration. It is well-known tha
Publicado em: 2007
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26. Leak detection and calibration of transient hydraulic system models / Calibração e detecção de vazamentos em modelos de sistemas hidráulicos no escoamento transitório
The occurrence of large leakage losses in water supply systems has been frequently linked with pipe breaks resulting from high pressures levels in pipes. Efficient location of leakages is required in order to effectively control water losses and quickly repair the system. Analysis of hydraulic transients has been particularly useful for calibration and leak
Publicado em: 2007
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27. "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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28. Compressible shear layer direct numerical simulation / Simulação numérica direta de camada cisalhante compressível com fonte de calor
No presente trabalho são feitas uma simulação numérica direta (SND) de camada de mistura em regime compressível com fonte de calor em seu interior, numa análise temporal bidimensional para um escoamento em regime subsonico. A fonte de calor apresenta-se como um modelo simplificado de um escoamento reativo. A simulação parte de um escoamento laminar a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2006
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29. Comparative analysis of machine foundation design methods / AnÃlise comparativa de mÃtodos de cÃlculo para fundaÃÃes de mÃquinas
Industrial technological advances, in the last decades, generated the development of high performance and precision machines which, by your turn, have demanded optimized foundation designs. Each time, several trials have to be considered to get a foundation design that conciliates the maximum efficiency with acceptable costs. Finite element modeling is a pow
Publicado em: 2006
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30. Simulação numérica direta de camada cisalhante compressível com fonte de calor / Compressible shear layer direct numerical simulation
No presente trabalho são feitas uma simulação numérica direta (SND) de camada de mistura em regime compressível com fonte de calor em seu interior, numa análise temporal bidimensional para um escoamento em regime subsonico. A fonte de calor apresenta-se como um modelo simplificado de um escoamento reativo. A simulação parte de um escoamento laminar a
Publicado em: 2006
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31. Simulação numérica direta de camada cisalhante compressível com fonte de calor / Compressible shear layer direct numerical simulation
No presente trabalho são feitas uma simulação numérica direta (SND) de camada de mistura em regime compressível com fonte de calor em seu interior, numa análise temporal bidimensional para um escoamento em regime subsonico. A fonte de calor apresenta-se como um modelo simplificado de um escoamento reativo. A simulação parte de um escoamento laminar a
Publicado em: 2006
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32. An-edge preserving multigrid-like for image denoising and inpainting / Uma técnica multimalhas para eliminação de ruídos e retoque digita"
Techniques based on the Well-Balanced Flow Equation have been employed as an efficient tool for edge preserving noise removal. Although effective, this technique demands high computational effort, rendering it not practical in several applications. This work aims at proposing a multigrid-like technique for speeding up the solution of the Well- Balanced Flow
Publicado em: 2006
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33. Detailed modelling and optmization of crystallization process / Modelagem detalhada e otimização de processos de cristalização
This work is focused on crystallization, a process widely used in industry, especially for the production of high added-value particles in pharmaceutical and fine chemistry industries. Although it is a process of established utilization, its mechanisms, modeling and the real control of its operation still require research and study. This thesis presents cons
Publicado em: 2006
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34. Modelagem do comportamento termo-mecânico transiente de estruturas de materiais compósitos pela teoria de volumes finitos
The advance of the materials science has motivated the advent of composite materials with different characteristics that assure high performance thermo-mechanical, such as the advanced fiber reinforced composites and those that present a gradual variation in its microstructure. Nowadays, many computational models and analytical methods are being employed for
Publicado em: 2006
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35. Desempenho de crianças em testes sensoriais discriminativos e afetivos com escalas hibridas ilustradas. / The performance of children in discriminative and affective sensory tests with illustrated hybrid scales.
In both developed and emerging countries, children represent a significant part of the consumer market, a market which, due to globalization, has become extremely competitive and avid for novelties. As the number of products destined for the child food market increases and the role of the child in the decision to buy also increases, sensory evaluations carri
Publicado em: 2006
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36. Front tracking in recirculating flows: a comparison between the TVD and RCM methods in solving the VOF equation
The modeling and simulation of mold filling must include a method to capture the interface formed between the inlet fluid and the fluid that was initially in the mold. A commonly used front-capturing method in a Eulerian mesh is the volume-of-fluid (VOF) method. The VOF advection equation solution may show numerical diffusion and/or dispersion and high-order
Brazilian Journal of Chemical Engineering. Publicado em: 2005-03