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Keywords:

  • discrete element method;
  • simulation;
  • magnetic filtration;
  • magnetic fields;
  • magnetic particles

Abstract

Using the discrete element method, we simulate numerically the cake formation and growth in magnetic field enhanced cake filtration to give further insight on the mechanisms of the structuring of the filter cake due to the interaction of magnetic, hydrodynamic, and mass forces. The motion of the discrete particles is obtained by applying the three-dimensional Newton's equations to individual particles, allowing for both external forces (gravity, applied magnetic field) and particle–particle interactions calculated using the modified DLVO-theory. Continuous liquid phase flow is assumed as one-dimensional. The simulation results compare favorably with reported experimental data,1 and can be used to delineate the regimes associated with different liquid flow and magnetic field effects that are observed experimentally. © 2012 American Institute of Chemical Engineers AIChE J, 2012