Granulation electrostatic forces

Attractive forces between solid particles. These may be due to electrostatic forces or van der Waal forces. However, these forces are not dominant in granules produced by wet granulation. These forces are more relevant to granules manufactured by dry granulation. 

The structure of the porous media can also be shaped by mechanical and electrostatic forces, e.g., sheeting of granules at conveyor walls (Yao et al., 2004), deposition of solid grains in the porous media, and fragmentation of catalyst carriers. Simple examples of mechanical diagenesis of porous media were already illustrated in Section II.D.4. In this section, we first describe the morphological operation of skeletonization and the methods used for the... 

Filtering is a term for a process of separation of particles from the carrying liquid as the suspension passes through the permeable material called filter. The basic difference from process of filtration is in high permeability of the porous material (filter). A porous granulated material or fiber material can serve as a filter. The separated substance can form a solid deposit at a filter s surface or in the internal pores of material. Particles with sizes smaller than filter s pores, deposit on the surface of granules of which the filter consists, due to forces of hydrodynamic, molecular, and electrostatic interaction. Other kinds of interactions are also possible. 

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