SUMÁRIO 1 INTRODUÇÃO
8 CONSIDERAÇÕES FINAIS
8.1 S UGESTÕES PARA TRABALHOS FUTUROS
A continuidade deste estudo pode ser realizada em diversas frentes, relacionadas ao método de solução, à abordagem do meio poroso e a possíveis desdobramentos do problema.
Dentro do campo numérico, o problema pode ser investigado por meio de outras abordagens, como o método dos volumes finitos, de modo a corroborar os resultados obtidos neste trabalho, além de avaliar as vantagens e desvantagens da utilização do LBM na solução do problema. Com relação ao LBM, podem ser consideradas a implementação de retículos não regulares (GUO e SHU, 2013), a introdução do comportamento não newtoniano do fluido diretamente na função de equilíbrio (YOSHINO et al., 2007; WANG e HO, 2008) e a utilização de modelos com melhor estabilidade numérica, como o modelo de regularização proposto por Latt e Chopard (2006). Desta forma, espera-se uma maior eficiência computacional do modelo numérico, devido à redução de malha em regiões com menores gradientes de velocidade e à manutenção do fator de relaxação (λlb) dentro dos níveis de estabilidade numérica, uma vez que λlb não dependeria da taxa de cisalhamento. Além disso, a investigação experimental do problema se mostra indispensável para validar os resultados obtidos no presente trabalho.
Com respeito ao meio poroso, pode-se analisar o problema considerando diferentes formas geométricas e disposições dos obstáculos, de modo a avaliar o efeito da estrutura do meio poroso sobre o escoamento na região livre do canal. Além do mais, pode-se avaliar a utilização da abordagem homogênea do meio poroso, a qual, em tese, reduz o custo computacional das simulações, uma vez que a complexidade geométrica do problema é reduzida. Para tanto, é necessário considerar modelos que descrevam o escoamento de fluidos não newtonianos em meio poroso, como os propostos por Shenoy (1993), Nakayama e Shenoy (1993) e Silva et al. (2016) para o escoamento de fluido de lei de potência, e por Vradis et al. (1993), para o fluido de Bingham.
Por fim, buscando retratar de forma mais fiel alguns dos exemplos citados na introdução deste trabalho, pode-se considerar a utilização de modelos de fluido mais complexos, introduzindo efeitos de tixotropia e elasticidade, mais de uma fase escoando através do canal (escoamento bifásico líquido-sólido, líquido-líquido e líquido-gás), escoamento turbulento e convecção forçada, levando em conta a troca de calor entre o
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