Abstract. Urban environments are of increasing importance in climate and air quality research due to their central role the population's health well-being. Tools model local environmental conditions, urban morphology interaction with atmospheric boundary layer play an important for sustainable planning policy making. uDALES is a high-resolution, building-resolving, large-eddy simulation code mi...

We present a dynamical spectral model for large-eddy simulation of the incompressible magnetohydrodynamic (MHD) equations based on the eddy damped quasinormal Markovian approximation. This model extends classical spectral large-eddy simulations for the Navier-Stokes equations to incorporate general (non-Kolmogorovian) spectra as well as eddy noise. We derive the model for MHD flows and show tha...

A new mixed model which uses the Leonard expansion (truncated to one term) supplemented by a purely dissipative term (dynamic Smagorinsky) has been developed and tested in actual Large Eddy Simulations (LES) of decaying homogeneous turbulence and of channel flow. This model assumes that the LES filter is smooth in wave space, which is the case of most filters defined in physical space (e.g., to...