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Download fileElectrical method of monitoring percolation and abrasion of conducting spheres due to shear flow of a dense suspension in a narrow gap
journal contribution
posted on 2009-06-22, 12:51 authored by Samjid H. Mannan, David A. Hutt, David C. WhalleyThis letter describes a method for studying the behavior of rigid particles in a dense suspension
when they are forced into contact during flow within a narrow gap. The particles form transient
percolating networks spanning the boundary walls, and will be crushed together. The method
involves measuring the dc electrical resistance across the gap. The suspension e.g., solder paste
consists of electrically conducting particles suspended in an insulating fluid. The electrical
resistance drops when the particles are in contact with each other and the walls, and the insulating
films on the surface of the conductors have been broken through. The results show a dramatic
change in behavior as the ratio of gap to particle diameter is varied.
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