New Length Scale for LES on Anisotropic Grids
Research Paper#Computational Fluid Dynamics, Large Eddy Simulation, Turbulence Modeling🔬 Research|Analyzed: Jan 3, 2026 19:42•
Published: Dec 27, 2025 22:27
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•ArXivAnalysis
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 / Citation
View Original"The paper introduces a novel subgrid characteristic length derived from the analysis of the entanglement between the numerical discretization and the filtering in LES."