Fluid Dynamics for Virtual Molecules: An Engineering Guide to the Principles & Assumptions Underpinning Turbulence Modelling Part 2: LES

Abstract

This talk provides an overview of the presentation materials prepared for the AIAA SciTech 2026 Special Session "Meet the Turbulence Modellers", organized under the auspices of the Integrated Collaborative Experimentation (ICE) Technical Activity Group 1 (TAG-1). The session sought to create a common conceptual framework between turbulence measurers and turbulence modellers in support of advancing verification and validation (V&V) for computational fluid dynamics (CFD). The accompanying slides, titled Fluid Dynamics for Virtual Molecules: An Engineering Guide to the Principles and Assumptions Underpinning Turbulence Modelling (Part II: LES), present an accessible narrative of the foundations and limitations of scale-resolving simulations method, Large-Eddy Simulation (LES) and Wall-Models used for LES. This talk summarizes the underlying modeling concepts with the goal of helping engineers and researchers outside the CFD community understand the conceptual basis and scope of modern turbulence models.