Compressive cake filtration

✍ Scribed by George G. Case; Max S. Willis

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 856 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)80283-i

✦ Synopsis

Previous works using the multiphase continuum theory to analyze cake filtration have identified the need of constitutive relations for the drag force between the phases and the stress on the solid matrix. In this work the BlakeKozeny expression, normally used with packed beds, is used to represent the drag force relationship and the stress on the solid matrix is empirically related to the strain. To apply the Blake-Kozeny expression a power-law function is used to account for changes in the specific surface area as the solid matrix deforms. Experimental data from a cake filtration of fibrous cellulose particles in water is evaluated using the above expressions. The tentative results indicate that the specific surface area increases with decreasing cake porosity and that the stress-strain relation is nonlinear.

INTRODUCHON

Cake filtration has been analyzed using the volumeaveraged continuum theory for multiphase processes