Research Paper#Computational Fluid Dynamics, Large Eddy Simulation, Turbulence Modeling🔬 ResearchAnalyzed: Jan 3, 2026 19:42
New Length Scale for LES on Anisotropic Grids
Published:Dec 27, 2025 22:27
•1 min read
•ArXiv
Analysis
This paper addresses a critical challenge in Large-Eddy Simulation (LES) – defining an appropriate subgrid characteristic length for anisotropic grids. This is particularly important for simulations of near-wall turbulence and shear layers, where anisotropic meshes are common. The paper's significance lies in proposing a novel length scale derived from the interplay of numerical discretization and filtering, aiming to improve the accuracy of LES models on such grids. The work's value is in providing a more robust and accurate approach to LES in complex flow simulations.
Key Takeaways
- •Proposes a new subgrid characteristic length for LES on anisotropic grids.
- •The length scale is derived from the interaction of numerical discretization and filtering.
- •Aims to improve the accuracy of LES models, especially in near-wall turbulence and shear layer simulations.
- •Demonstrated effectiveness through simulations of decaying isotropic turbulence and turbulent channel flow.
Reference
“The paper introduces a novel subgrid characteristic length derived from the analysis of the entanglement between the numerical discretization and the filtering in LES.”