Critical Scaling of Granular Rheology

Rheology of dense granular matter in the vicinity of the jamming transition is investigated. Critical scaling laws that describe shear stress, pressure, and kinetic temperature are investigated. The scaling exponents are modified from those previously estimated by the present author [T. Hatano, J. Phys. Soc. Jpn. 77 (2008), 123002] and also compared with those proposed by Otsuki and Hayakawa [M. Otsuki and H. Hayakawa, Prog. Theor. Phys. 121 (2009), 647].