Turbulent near-wake development behind a flat plate |
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| Institution: | 3. European Commission Joint Research Centre (JRC), Directorate of Sustainable Resources, Water and Marine Resources Unit, Ispra, VA, Italy;1. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 315201, Ningbo, China;2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding-xi Road, 200050, Shanghai, China;3. School of Physical Science and Technology, Shanghai Tech University, 201210, Shanghai, China;4. University of Chinese Academy of Sciences, 100049, Beijing, China;5. School of Marine Sciences, Ningbo University, 315211, Ningbo, China;1. Gayatri Vidya Parishad College of Engineering, Madhurawada, Visakhapatnam, 530048, India;2. Indian Maritime University (Visakhapatnam Campus), Gandhigram, Visakhapatnam, 530015, India;1. Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;2. Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid Flow Machinery, Fiszera 14, 80-231 Gdańsk, Poland;1. Department of Biomedical Engineering, The Johns Hopkins School of Medicine, Baltimore, MD, United States;2. The Kennedy Krieger Institute, Baltimore, MD, United States;3. Department of Neuroscience, The Johns Hopkins School of Medicine, Baltimore, MD, United States |
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| Abstract: | An asymptotic analysis of the two-dimensional turbulent near-wake flow behind a flat plate with sharp trailing edge has been formulated. The feature that the near-wake, which is dominated by the mixing of the oncoming turbulent boundary layers retains, to a large extent, the memory of the turbulent structure of the upstream boundary layer has been exploited to develop the analysis. This analysis leads to two regions of the near-wake flow (the inner near-wake and the outer near-wake) for which the governing equations are derived. The matching conditions among these regions lead to a logarithmic variation in the normal direction in the overlapping region surrounding the inner near-wake. These features are validated by the available experimental data. Similarity solutions for the velocity distribution (which satisfy the required matching conditions) in the inner near-wake and outer near-wake regions have been obtained by making the appropriate eddy-viscosity assumptions. Uniformly valid solutions for velocity distribution have been constructed for the near-wake. The solutions show good agreement with available experimental data. |
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