  In this communication, we present a new lengthscale-based rheology for dense
sheared particle suspensions as they transition from inertial- to
viscous-dominated. We derive a lengthscale ratio using straightforward
physics-based considerations for a particle subjected to pressure and drag
forces. In doing so, we demonstrate that an appropriately chosen length-scale
ratio intrinsically provides a consistent relationship between normal stress
and system proximity to its ''jammed'' or solid-like state, even as a system
transitions between inertial and viscous states, captured by a variable Stokes
number.
