Formulações espectrais para solução de problemas de transporte de partículas

Autores

DOI:

https://doi.org/10.5902/2179460X40952

Palavras-chave:

Método de Ordenadas Discretas Analítico, Dinâmica de Gases Rarefeitos, Transporte de Nêutrons, Métodos Espectrais

Resumo

Neste trabalho, um método determinístico para solução da equação integrodiferencial linear de Boltzmann em geometria Cartesiana unidimensional e bidimensional, é apresentado. A formulação é de característica espectral e determina soluções explícitas nas variáveis espaciais para a chamada aproximação em ordenadas discretas do modelo original. Uma característica relevante do método é a obtenção de problemas de autovalores de ordem reduzida à metade do número de direções discretas. Tal aspecto, bem como a possibilidade de uso de esquemas de quadratura arbitrários para o tratamento do termo integral da equação são fundamentais para a obtenção de soluções concisas, rápidas e precisas de problemas de interesse. Em particular, aqui, as derivações são apresentadas para modelos referentes à duas diferentes áreas de aplicação: a dinâmica de gases rarefeitos e o transporte de nêutrons. Aspectos comuns aos dois modelos são ressaltados e extensões da formulação à outras aplicações são comentadas e referenciadas.

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Biografia do Autor

Liliane Basso Barichello, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS

Professora Titular do Departamento de Matemática Pura e Aplicada da Universidade Federal do Rio Grande do Sul

Patricia Rodrigues Fortes, Universidade Federal de Santa Maria, Frederico Westphalen, RS

Professora da Universidade Federal de Santa Maria, campus de Frederico Westphalen

Camila Becker Picoloto, Universidade Federal de Santa Maria, Cachoeira do Sul, RS

Professora adjunta na Universidade Federal de Santa Maria, campus Cachoeira do Sul

Mariza de Camargo, Universidade Federal de Santa Maria, Frederico Westphalen, RS

Professora da Universidade Federal de Santa Maria, campus de Frederico Westphalen

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Publicado

2020-09-03

Como Citar

Barichello, L. B., Fortes, P. R., Picoloto, C. B., & Camargo, M. de. (2020). Formulações espectrais para solução de problemas de transporte de partículas. Ciência E Natura, 42, e39. https://doi.org/10.5902/2179460X40952

Edição

Seção

40 ANOS - Edição especial de aniversário

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