2005
DOI: 10.1002/0471720577
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Rheometry of Pastes, Suspensions, and Granular Materials

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Cited by 463 publications
(531 citation statements)
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“…The dynamics of such complex uids is usually characterized by a large interface area and a relatively large packing fraction of the dispersed phases, giving rise to a genuinely new branch of non-equilibrium thermodynamics which has witnessed a major upsurge of interest in the last decades, mostly in connection with so-matter research. [1][2][3] As a general rule, a process called coarsening takes place to minimize interface area: the dispersed phase diffuses through the continuous one to reduce the total area of the interface. On average, large domains expand at the expense of smaller ones that shrink and eventually disappear.…”
Section: Introductionmentioning
confidence: 99%
“…The dynamics of such complex uids is usually characterized by a large interface area and a relatively large packing fraction of the dispersed phases, giving rise to a genuinely new branch of non-equilibrium thermodynamics which has witnessed a major upsurge of interest in the last decades, mostly in connection with so-matter research. [1][2][3] As a general rule, a process called coarsening takes place to minimize interface area: the dispersed phase diffuses through the continuous one to reduce the total area of the interface. On average, large domains expand at the expense of smaller ones that shrink and eventually disappear.…”
Section: Introductionmentioning
confidence: 99%
“…Para altos graus de sedimentação a rugosidade da superfície pode não reduzir o deslizamento na parede, por isso é importante o controle da sedimentação, cuidando para não tornar a pasta instável com altas dosagens de aditivos (19) Segundo Coussot (22), ainda permanecem obscuras as questões físicas que implicam no fenômeno de deslizamento na parede, pois cada material pode apresentar uma solução diferente; além disso, até então não existe teoria para predizer sob quais condições o deslizamento ocorrerá como função do escoamento, material e geometria, permanecendo um campo aberto de estudo.…”
Section: Principais Desafios Experimentaisunclassified
“…Conforme Coussot (22), um dos problemas encontrados ao trabalhar com suspensões é a migração de partículas, sua ocorrência está relacionada ao tamanho das partículas envolvidas na suspensão. Wallevik (18) relata que partículas de elevado diâmetro tendem a escapar de regiões com alto cisalhamento, em reômetros com geometria coaxial, está zona fica próxima a parede interna do cilindro, nesse caso devido a migração dessas partículas as propriedades reológicas seriam reduzidas perto da parede, tornando a pasta heterogênea, invalidando os dados.…”
Section: Principais Desafios Experimentaisunclassified
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