Evaluation of subgrid scale kinetic energy models in large eddy simulations of turbulent channel flow
| Autor: | Sarma L. Rani, Chad Winkler |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Scale (ratio) Turbulence Applied Mathematics Mechanical Engineering Direct numerical simulation Reynolds number Reynolds stress equation model Kinetic energy Computer Science Applications Open-channel flow symbols.namesake Mechanics of Materials Turbulence kinetic energy symbols Statistical physics |
| Zdroj: | International Journal of Numerical Methods for Heat & Fluid Flow. 16:226-239 |
| ISSN: | 0961-5539 |
| DOI: | 10.1108/09615530610644280 |
| Popis: | PurposeTo evaluate the performance of different subgrid kinetic energy models across a range of Reynolds numbers while keeping the grid constant.Design/methodology/approachA dynamic subgrid kinetic energy model, a static coefficient kinetic energy model, and a “no‐model” method are compared with direct numerical simulation (DNS) data at two friction Reynolds numbers of 180 and 590 for turbulent channel flow.FindingsResults indicate that, at lower Reynolds numbers, the dynamic model more closely matches DNS data. As the amount of energy in the unresolved scales increases, the performance of both kinetic energy models is seen to decrease.Originality/valueThis paper provides guidance to engineers who routinely use a single grid to study a wide range of flow conditions (i.e. Reynolds numbers), and what level of accuracy can be expected by using kinetic energy models for large eddy simulations. |
| Databáze: | OpenAIRE |
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