  A promising and cost-effective method for numerical simulation of high Re
wall-bounded flows is wall-modeled large-eddy simulation. Most wall models are
formulated from the Reynolds-averaged Navier-Stokes equations (RANS). These
RANS-based wall models are calibrated using mean turbulence data and make no
use of the current vast knowledge on turbulent flow structure. Moreover,
RANS-based models are limited to predicting the mean velocity profile, and the
mean wall shear stress. Using the knowledge of the wall-normal self-similarity
of high-$Re_\tau$ wall-bounded turbulent flows, we present a coupling between a
near-wall patch of DNS resolution fixed in inner-units and an outer LES flow
field. The near-wall patch captures the near-wall self-sustaining cycle as well
as the lower portion of the self-similar hierarchy of eddies. Given that both
the near-wall patch and the LES capture separate portions of the self-similar
hierarchy of eddies an instantaneous top boundary condition for the patch is
formulated. The near-wall model is capable of predicting subgrid-scale
quantities such as the wall stress, velocity fluctuations, kinetic energy
spectra, and flow structure across the entire near-wall layer.
