APPROXIMATE THEORY FOR RADIAL FILTRATION/CONSOLIDATION

The authors develop approximate solutions for filtration and subsequent consolidation of compactible cakes on a cylindrical filter element. Darcy's flow equation is combined with equations for equilibrium stress under the conditions of plane strain and axial symmetry for radial flow inwards. The solutions are based on power function forms involving the relationships of the solidosity and the permeability to the solids effective stress. The solutions permit determination of the various parameters in the power functions and the ratio of the lateral to radial effective stress. Investigators measured liquid and effective pressures, flow rates, and cake thickness versus time. Experimental data from a series of tests in a radial filtration cell with a central filter element are presented. Two different slurries were prepared for the experiments. Transient deposition of filter cakes was followed by static conditions in the cake. The no-flow condition was created by introducing bentonite, producing a nearly impermeable layer with neglible flow. Measurement of the pressure at the cake surface and the transmitted pressure on the central element allowed computation of the earth stress ratio.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 797-805
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00729991
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 15 1997 12:00AM