Modelagem e simulação de fluidos via técnicas de sketching, modelos de difusão-reação e método de lattice Boltzmann

• Autor(a) principal: Judice, Sicilia Ferreira Ponce Pasini
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do LNCC
• Texto Completo: https://tede.lncc.br/handle/tede/241
• topic: Reconhecimento de padrões; Dinâmica dos fluidos; Fluid dymanic; Pattern recognition; Lattice Boltzmann method; CNPQ::CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAO::METODOLOGIA E TECNICAS DA COMPUTACAO::PROCESSAMENTO GRAFICO (GRAPHICS)

This work presents a methodology involving two-dimensional fluids initialization through sketching techniques (free draw on tablets, for example) along with diffusion-reaction equations and fluid simulation using Lattice Boltzmann Method (LBM). In the initial stage, the framework converts the drawings made by the users into streamlines. From these lines it is generated a partial velocity field, which is widespread throughout the fluid domain through diffusion-reaction techniques. The velocity field obtained at the end of the process is used to initialize the fluid simulation via the LBM method. We tested two diffusion-reaction techniques, one based on differential equations (Gradient Vector Flow) and another in LBM models. We discussed aspects of vector fields topology and fluid dynamics involved in the sketching conversion into streamlines, as well as the preservation of singularities by the diffusion-reaction methods analyzed. The aim of our application is in the areas of visual effects and computer graphics. In this sense, we presented visual results involving the theoretical concepts which demonstrate the potential of the methodology presented for computational fluid animation .