Sedimentation enhanced gravity

Particle Manipulation Using Ultrasonic Fields, Fig. 2 Enhanced sedimentation. Particles within an ultrasonic field left) are agglomerated by the field center) and then tend to sediment under gravity right)... 

This process is fundamentally important when considering centrifugation, but does not necessitate the use of a centrifugal force. In its most rudimentary form, molecules in solution or particles in suspensions move imder gravity to sediment (settle) at the bottom of a solution. However, there may be other external forces over that of gravity that can be applied to enhance sedimentation and yield. 

The main process disturbing the aggregative stability of w/o emulsions is flocculation, i.e. formation of large compact aggregates which rapidly sediment in the gravity field [50, 58]. Two variants are proposed to increase the aggregative stability of w/o emulsions a) use of oil-soluble surfactants and their mixtures with water-soluble surfactants b) introduction of stabilizing additives which ai e able to enhance the electrostatic repulsion of the droplets. 

A smafi density difference betwem the solid and fiuid phases would probabfy eliminate sedimentation as a posdbihty, unless the dendty difference can be enhanced, or the force field of gravity increased by centrifugal action. Such techniques for enhancing sedinrentation would... 

---