Workshop 2022

Large Eddy Simulation Workshop on Smooth-Body Separation at AIAA SciTech 2022

The AIAA Fluid Dynamics Technical Committee’s LES Discussion Group is organizing a workshop focused on the prediction of a separated flow using wall-resolved LES (WRLES) and wall-modeled LES (WMLES) at the SciTech 2022 meeting in San Diego, CA. The workshop will be held during the weekend immediately following the SciTech meeting, specifically on Sat/Sun January 8-9, 2022. A flyer for the workshop can be downloaded here.

Focus of the workshop

While there are many interesting and important aspects of LES, the organizing committee has decided to focus this specific workshop on the application of LES to wall-bounded flows at very high Reynolds numbers. As is well known, this requires the turbulence in the inner part of the boundary layer to be modeled rather than resolved. One of the most important challenges in such “wall-modeled LES” is the ability to accurately predict separated flows, specifically flows where the separation is not dictated by abrupt geometric changes (e.g., sharp corners). Therefore, the workshop will focus on a central test case that features an equilibrium incoming boundary layer, separation over a smoothly curved ramp, and reattachment. The test case will be run at Mach 0.2 in order to enable both compressible and incompressible codes to be used. The test case has further been chosen to strike a balance between physical realism and computational cost, where it is recognized that a limited computational cost implies both that a broader group of research groups can participate and (equally importantly) that participants can afford to compute on a sequence of refined grids in order to carefully assess grid convergence (or the lack thereof).
The purpose of the workshop is to provide a snapshot of the predictive capability of modern LES methods on smooth-body separation flows at high Reynolds numbers, and to build a comparative database for use in future method assessments.

Monthly videoconferences

Participants (and prospective participants, and interested observers) meet on the first Monday of every month at 12pm (noon) US Eastern Time. The Zoom link for these calls is

Notes and prior communications

Google drive and case description

Grids and a description of the workshop cases can be found at
Note that there are both regular and high-order grids, in two different directories.

The case description file is updated occasionally, with the full history given here: