Suspension rheology

Suspension rheology relates particle concentration, particle pressure, shear stress, deformation rate, and fluid migration in a mixture of particles and a liquid.

Jamming is the loss of the ability of a dense disordered material to flow as its particle fraction or applied confinement reaches a critical state.

The viscous number $I_v=\eta |\dot{\gamma }|/p_s$ compares viscous shear stress with particle pressure in a dense suspension.

Shear-induced dilation is the tendency of a dense granular or suspended-particle packing to increase its volume under shear. In a saturated confined system it requires pore-fluid migration and can delay stress adjustment.