Modelos de Transporte de Contaminantes com Biodegradação na Subsuperfície
DOI:
https://doi.org/10.5540/tema.2008.09.01.0051Abstract
Dois modelos matemáticos são propostos para o transporte reativo nãolinear de contaminantes na sub-superfície, o primeiro considerando o processo de biodegradação aeróbia de duas espécies de contaminantes, e o segundo sob condições aeróbia e anaeróbia de biodegradação de uma única espécie poluidora. Para resolver numericamente esses modelos é aplicada uma metodologia completamente acoplada(CA), no sentido que todos os operadores diferenciais de cada equação de transporte são discretizados e resolvidos simultaneamente como um sistema completo. Desta forma, são empregados os métodos SUPG (Streamline Upwind Petrov Galerkin), de elementos finitos, e Euler Implícito, de diferenças finitas, nas aproximações espaciais e temporais, respectivamente, e um algoritmo iterativo associado ao método de Newton na linearização e no desacoplamento dos sistemas de equações resultantes. Resultados numéricos são apresentados para demonstrar e ilustrar a eficiência das metodologias propostas quando aplicadas à modelagem de situações de interesse na contaminação de águas subterrâneas.References
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