Fundamental physical laws governing the behaviour of fluidparticle systems. Particle agglomeration and non-Newtonian pipeline flows; flow through porous media; particle settling; multiparticle drag relationships; particle interactions in dense, coarse particle slurry flows; flowing granular solids. Application of the physical laws in paste or thickened tailings pipelining; horizontal oil well production; oil sand hydrotransport; and bulk solids handling.