  Dense granular flows are well described by several continuum models, however,
their internal dynamics remain elusive. This study explores the contact force
distributions in simulated steady and homogenous shear flows. Results
demonstrate the existence of high magnitude contact forces in faster flows with
stiffer grains. A proposed physical mechanism explains this rate-dependent
force transmission. This analysis establishes a relation between contact forces
and grain velocities, providing an entry point to unify a range of continuum
models derived from either contact forces or grain velocity.
