Dewatering of fibre suspensions by pressure filtration
Dewatering of fibre suspensions by pressure filtration
复制标题
通过压力过滤对纤维悬浮液进行脱水
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Martinez
中科院分区：
文献类型：
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作者：
D. Hewitt;D. Paterson;N. Balmforth;D. Martinez
本文对纤维悬浮液单轴压缩脱水进行了理论和实验研究。一维模型的解决方案进行了讨论和渐近极限的快速和缓慢的压缩进行了探讨。特别关注的是相对快速的压缩和相应的发展空间变化的固体和速度分布的悬浮液。补充实验室实验的结果，尼龙或纤维素纤维悬浮在粘性流体。独立测量每种悬浮液的本构关系。不同的固定压缩速度的负载的测量，连同一些直接测量的速度分布使用粒子跟踪测速仪，与模型预测进行比较。这种比较对于尼龙是合理的，但是对于纤维素纤维是不合理的。一个扩展的模型，它允许在网络应力应变率相关的组件，提出，并发现给戏剧…
A theoretical and experimental study of dewatering of fibre suspensions by uniaxial compression is presented. Solutions of a one-dimensional model are discussed and asymptotic limits of fast and slow compression are explored. Particular focus is given to relatively rapid compression and to the corresponding development of spatial variations in the solidity and velocity profiles of the suspension. The results of complementary laboratory experiments are presented for nylon or cellulose fibres suspended in viscous fluid. The constitutive relationships for each suspension were measured independently. Measurements of the load for different fixed compression speeds, together with some direct measurements of the velocity profiles using particle tracking velocimetry, are compared with model predictions. The comparison is reasonable for nylon, but poor for cellulose fibres. An extension to the model, which allows for a strain-rate-dependent component in the network stress, is proposed, and is found to give a drama...