Assessment Measures for Engineering LES Applications

Author:

Celik I.1,Klein M.2,Janicka J.2

Affiliation:

1. Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26505

2. Energy and Power-Plant Technology (EKT), Department of Mechanical Engineering, Technical University of Darmstadt, Darmstadt 64287, Germany

Abstract

Abstract Anticipating that large eddy simulations will increasingly become the future engineering tool for research, development, and design, it is deemed necessary to formulate some quality assessment measures that can be used to judge the resolution of turbulent scales and the accuracy of predictions. In this context some new and refined measures are proposed and compared with those already published by the authors in the common literature. These measures involve (a) fraction of the total turbulent kinetic energy, (b) relative grid size with respect to Kolmogorov or Taylor scales, and (c) relative effective subgrid/numerical viscosity with respect to molecular viscosity. In addition, an attempt is made to segregate the contributions from numerical and modeling errors. Proposed measures are applied to various test cases and validated against fully resolved large eddy simulation and/or direct numerical simulation whenever possible.

Publisher

ASME International

Subject

Mechanical Engineering

Reference22 articles.

1. On the Use of Discrete Filters for Large Eddy Simulation;Lund

2. A Framework for Predicting Accuracy Limitations in Large-Eddy Simulation;Geurts;Phys. Fluids

3. Database Analysis of Errors in Large Eddy Simulation;Meyers;Phys. Fluids

4. Comparison of Numerical Schemes in Large Eddy Simulation of the Temporal Mixing Layer;Vreman;Int. J. Numer. Methods Fluids

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