Populating the wall layer, one eddy at a time: Resolvent analysis for Wall-Modelled LES
Abstract
Computational cost precludes direct simulation of non-equilibrium turbulent flows in realistic conditions. Wall-modelled large-eddy simulations (WMLES) and hybrid RANS/LES methods can be used to analyze them at much decreased cost, but require modelling of the near-wall layer. Effective models exist for equilibrium boundary layers, but they are not accurate in more complex configurations. In this research we propose to advance the state-of-the-art of WMLES by using low-order resolvent-based models to populate the wall layer of WMLES with realistic eddies, enabling modelling of local and instantaneous values of velocity and stresses and providing the means to improve the inner/outer-layer coupling that can limit the effectiveness of current WMLES in non-equilibrium flows.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 21, 2022
- Source ID
- FA95502110443XX0
Entities
People
- Ugo Piomelli
Organizations
- Air Force Office of Scientific Research
- Queen's University
- United States Air Force