Published In
Advances in Filtration and Separation Technology
Document Type
Post-Print
Publication Date
1998
Subjects
Cake filters, Filters and filtration -- Mathematical models, Pore water -- Analysis, Porosity -- Measurement, Water -- Purification -- Filtration
Abstract
During the initial stages of a Buchner funnel or specific resistance test, gravity drainage occurs prior to application of the pressure differential. Some allow time for a small cake to form by gravity drainage. Filtrate data from the gravity drainage period can be used to determine constitutive properties of the cake under a hydrostatic pressure gradient. The constitutive properties that define the structure of the cake include the permeability and porosity as functions of the applied stress. Equations governing the drainage rate during a gravity filtration experiment assuming a constant and a non-constant average cake permeability and cake porosity were developed. Numerical solutions were shown predicting the gravity drainage rate given known constitutive relationships. Also, a procedure was shown illustrating how constitutive relationships could be determined using gravity drainage data.
Persistent Identifier
http://archives.pdx.edu/ds/psu/12007
Citation Details
Wells, S., and Gregory K. Savage. "Gravity Drainage Prior to Cake Filtration." Advances in Filtration and Separation Technology, vol. 12 (1998): 646-653.
Description
This is the author's version of an article subsequently published in Advances in Filtration and Separation Technology, vol. 12 (1998): 646-653.