A Near-Wall Methodology for Large-Eddy Simulation Based on Dynamic Hybrid RANS-LES
Michael Tullis, D Keith Walters, Amir E Fard · 2024
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Description
Tullis and Walters present a cheaper way to simulate turbulent flow near walls in large-eddy simulation. Resolving the thin layer at a wall is the most expensive part of such simulations. Their method sizes the mesh near the wall like a wall-modeled approach in flow directions. Across the layer it uses a finer mesh like an averaged-flow simulation. The local turbulence level comes from a mixing-length model capped by mesh size.
The near-wall treatment is blended smoothly into the outer simulation through a dynamic hybrid framework. Tests on turbulent channel flow at two Reynolds numbers matched direct simulation data well for mean flow and fluctuations, with no mismatch at the layer boundary. The authors estimate it needs about twice the grid points of standard wall-modeled simulation while avoiding wall functions. The catalog lists a third author whom the text byline omits.
Catalog record
| CREATOR | Michael Tullis, D Keith Walters, Amir E Fard |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 49 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |