An Appraisal of Turbulence Dissipation Rate Estimation Methods Using Large Eddy Simulation

Abstract:

Various methods –direct methods, structure function methods and dimensional analysis-have been proposed to estimate the dissipate rate of turbulent kinetic energy. In this study these methods were appraised using LES data of a turbulent flow in the straight pipe at Re=5300. The fact that the corrected second-order structure function method is robust can be found. Note that when approaching to the wall at low Reynolds number, structure function methods and dimensional analysis method usually become inaccurate since they can not reflect information about the radial gradients. Direct computation methods now give acceptable trend and good estimation. Methods mentioned above lead to the same order of magnitude as values from DNS data most times.

• Periodical: Advanced Materials Research (Volumes 1070-1072)
• Pages: 1951-1956
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1951
• Online since: December 2014
• Authors: Jing Chen*, Yi Liang Chen
• Keywords: Dissipation Rate, Large Eddy Simulation (LES), Second-Order Structure Function

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