Modelagem matemática e simulação de escoamentos em canais anulares com interação fluido-estrutura

• Autor(a) principal: Borges, Jonatas Emmanuel
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/14881
• topic: Escoamentos anulares; Método da fronteira imersa; Modelo de muti forçagem direta; Interação fluido-estrutura; Mecânica dos fluidos; Dinâmica dos fluidos; Diferenças finitas; Simulação (Computadores); Annular flows; Immersed boundary method; Multi direct forcing; Fluid-structure interation; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA

The objective is to continue to develop a numerical platform in annular channels, present problems in engineering and drilling of oil and gas industry. The numerical platform, developed using the method of finite volume discretization, employing methods and schemes of second order. The use of immersed boundary method allows for the representation of structures that represent the geometry defining the problems. The original version (with virtual physical model) was modified by replacing the model that assesses the strength lagrangian, and implemented the model called multi direct forcing. This modification led to a considerable reduction of the computational cost of simulating about 16 times. With this reduction in time, it was possible to work with more refined meshes, which made the simulations of the flow with the most reliable reference data. So you can show more clearly the formation of Taylor vortex during the transient until steady state flow in Taylor-Couette, Taylor-Couette with forced oscillation, Taylor-Couette with shift forced Taylor-Couette with oscillation and translation forced Taylor-Couette Spiral, Taylor-Couette Spiral with forced oscillation. A final application was considered with the aim of assessing the numerical methodology facing problems with moving interface is not imposed.