Esquema numérico com reconstrução mínimos quadrados de alta ordem em malhas não-estruturadas para a formulação euleriana do transporte de partículas / Numerical scheme with high order least square reconstruction on unstructured grid to eulerian formulation of the particle transport

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The particle transport study has a fundamental importance in diverse research area like in the icing accretion on an aircraft because that can affect its sustentation and stability. The concern is so big that many researches have been carried through, resulting in computational codes like the LEWICE in the United States, TRAJICE in the United Kingdom, ONERA in France and CANICE in Canada. In Brazil, one of the study has been made by the EMBRAER with some institutes. The goal of this work is to develop an algorithm that can be used in the particles trajectory study, using an Eulerian method that eliminates the difficulty particle sowing, particular of the Lagrangian method, in the determination of the droplet fraction volume. This is made by the finite volume method on unstructured meshes whose main key is the high order reconstruction with restriction on the boundary. The development of the work involves 3 stages: geometry definition and mesh generation; using code for the treatment of the air flow and obtained flow velocity; use of the high order numerical scheme least square reconstruction to simulate the droplet fraction volume result with imposition of appropriate limit conditions in the body contour. The realized simulations shown that Least Square method can be used in problem resolution that present descontinuos region like is shadow region reducing numerical diffusion and overshoots.

ASSUNTO(S)

unstructured grid advecção-difusão reconstrução de alta ordem eulerian formulation volumes finitos finite volume method high order reconstruction malha não-estruturada formulação euleriana advection-diffusion

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