23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-1.9.1

SIMULATION OF STATISTICAL MEAN BEHAVIORS AND COHERENT STRUCTURES OF INCOMPRESSIBLE TURBULENT FLOWS USING UNILATERAL-AVERAGE BASED GOVERNING EQUATIONS

G. Gao (1), Y. Yong (2)
(1) Beijing University of Aeronautics and Astronautics, Beijing, PRC; (2)Florida Atlantic University, USA

Keywords: rational approach to turbulence, unilateral-average, unified model for mean and coherent flows

Based on unilateral statistical average, the rational approach to turbulence is performed for incompressible flow. As the average captures the first-order statistical information of the fluctuations, the obtained equations preserve the key properties of turbulence. The final equations contain no empirical coefficients and wall functions and are able to describe statistical mean flow and coherent flow. Four typical benchmark turbulent flows are simulated to verify the adaptability of the model.

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