Dewatering of concentrated flocculated suspensions in a screw press

加压过滤是从悬浮液中去除液体的重要方法。对于颗粒柔软和多孔的情况，对这一过程进行建模会遇到困难。在这里，脱水是由两个不同孔隙度尺度上发生的过程控制的。虽然这类问题通常在自然和工程环境中发现，但这项工作的动机源于纸浆和造纸在纸浆加工中的应用。特别是，这项工作是与瓦尔梅特(蒙特利尔)的合作伙伴关系，在其中我们将检查脱水过程中剪切的影响。它是不列颠哥伦比亚大学(UBC)和魁北克大学三河分校(UQTR)的合作伙伴关系。该项目将在四年内由两名博士生和两名本科生进行。

Pressure filtration is an important method for removing liquids from a suspension. Difficulties arise in modeling this process for cases where the particles are soft and porous. Here the dewatering is governed by processes occurring on two different porosity scales. Although this class of problem is commonly found in natural and engineering settings, the motivation of this work stems from a Pulp and Paper application in pulp processing. In particular, this work is a partnership with Valmet (Montreal) in which we will examine the effect of shear during dewatering. It is a partnership between the University of British Columbia (UBC) and the University of Quebec at Three Rivers (UQTR). The project will be over a four year period in which the work will be conducted by 2 PhD and 2 undergraduate students.