Large eddy simulation (LES) is a numerical model primarily used to study boundary layers and turbulence. LES was first proposed by Joseph Smagorinsky to simulate atmospheric currents. LES simulates turbulence by solving Navier-Stokes equations at a very wide range of time and length scales. LES, contrary to DNS, uses a low-pass filter to ignore the smallest length scales while resolving larger scales in an effort to save computational resources. Different researchers use different LES code bases, one of which is MicroHH.
MicroHH is a computational fluid dynamics code made for direct numerical simulation and LES. BLISS team member Dr. Jeremy Gibbs contibuted to its development.