Stokes Equation
Mostrando 25-36 de 48 artigos, teses e dissertações.
-
25. Estudo de métodos numéricos para solução de problemas de fenômenos de transporte em malhas não estruturadas / Study of numerical methods for problems of transport phenomenons in unstructured mesh
O presente trabalho apresenta a especificação de uma biblioteca computacional que está sendo desenvolvida com a finalidade de auxiliar na busca de erros que surgem durante o desenvolvimento de um modelo numérico. A referida biblioteca mostra cromogramas das variáveis sendo calculadas. Ela é capaz de atualizar os campos calculados em cada iteração, o
Publicado em: 2007
-
26. Numerical analysis of the turbulent coaxial jets / Análise numérica de jatos coaxiais turbulentos
The understanding of the jets behavior is of extreme importance in several practical applications in combustion and propulsion. Therefore, it becomes more and more important the detailed analysis of the parameters that affect the characteristics of this type of flow. This work presents a numerical study of the incompressible turbulent coaxial jets characteri
Publicado em: 2007
-
27. Modelagem multiescala do acoplamento eletro-químico em um meio poroso argiloso com dependência do PH / Multiscale modeling of eletro-chemical couplings in clays including PH dependence
In this work we develop a three-scale mathematical modeling to describe electro-chemical couplings in clays using the asymptotic homogenization procedure of periodic structures. We consider the porous medium composed of kaolinite particles saturated by an electrolyte solution of water-solvent and four ionic solutes monovalents Na+, H+, Cl-, OH-At the nanosca
Publicado em: 2007
-
28. "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
-
29. NAVIER-STOKES EM GPU / NAVIER-STOKES EM GPU
Nesse trabalho, mostramos como simular um fluido em duas dimensões em um domÃnio com fronteiras arbitrárias. Nosso trabalho é baseado no esquema stable fluids desenvolvido por Joe Stam. A implementação é feita na GPU (Graphics Processing Unit), permitindo velocidade de interação com o fluido. Fazemos uso da linguagem Cg (C for Grap
Publicado em: 2006
-
30. Métodos de elementos finitos estabilizados para escoamentos de Darcy e de Stokes-Darcy acoplados / Stabilized finite element methods for darcy and coupled stokes-darcy flows
In this thesis we propose new stabilized finite element methods for Darcy flow and for the coupled Stokes-Darcy flow. We review the Galerkin method applied to the classical variational formulations of the Darcy s system, and comment on some stabilization techniques proposed in the literature. Through the consistent combination of least square residuals of th
Publicado em: 2006
-
31. Fluid animation by cellular automata and particles systems / Animação de fluidos via autômatos celulares e sistemas de partículas
The past two decades showed a rapid growing of physically-based modeling of fluids for computer graphics applications. Techniques in the field of Computational Fluid Dynamics (CFD) have been applied for realistic fluid animation for virtual surgery simulators, computer games and visual effects. In this approach, since the equation is solved numerically the n
Publicado em: 2006
-
32. The boundary element method applied to incompressible viscous fluid flow
An Integral equation formulation for steady flow of a viscous fluid is presented based on the boundary element method. The continuity, Navier-Stokes and energy equations are used for calculation of the flow field. The governing differential equations, in terms of primitive variables, are derived using velocity-pressure-temperature. The calculation of fundame
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-12
-
33. Patrones de flujo según diferentes marcos de referencia
In a diagnostic exam on fluid mechanics, in which students are asked to draw flow diagrams of a simple geometry case, there is an apparent confusion associated to reference frame changes. As a didactic tool, we propose a comparative analysis of flow diagrams on different relative movement conditions of the same system, consisting in a cylindric pipe containi
Revista Brasileira de Ensino de Física. Publicado em: 2005-09
-
34. 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
-
35. Fluxos ideais e incompressiveis bidimensionais em dominios não-cilindricos / Two-dimensional incompressible ideal flow in a noncylindrical material domain
In this work we shall prove the existence of weak solutions of the incompressible Euler equations in two-dimensional domains with smoothly moving boundaries. The main objective is to rebuild the work developed by Cheng He and Ling Hsiao (2000) with appropriate conditions for material domains. To show the existence of a weak solution for the Euler equations i
Publicado em: 2005
-
36. Weak three dimensionality of a flow around a slender cylinder: the Ginzburg-Landau equation
In this paper a weak three-dimensionality of the flow around a slender cylinder is considered and the related model, the so-called Ginzburg-Landau equation, is here obtained as an asymptotic solution of the 3D (discrete) Navier-Stokes equation. The derivation is in line with existing slender bodies theories, as the Lifting Line Theory, for example, where the
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-12