Energy separation in the wake of a cylinder: Effect of Reynolds number and acoustic resonance |
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Authors: | KS Kulkarni RJ Goldstein |
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Affiliation: | 1. Department of Industrial Engineering, University of Salerno, Campus of Fisciano, 84084, Fisciano, Italy;2. Department of Mathematics, University of Salerno, Campus of Fisciano, 84084, Fisciano, Italy |
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Abstract: | Energy separation is a spontaneous redistribution of total energy in a flowing fluid without external work or heat transfer. The energy separation mechanism in the vortex field behind an adiabatic circular cylinder in a cross flow of air is investigated. Time-averaged velocity and temperature measurements taken one diameter downstream of the cylinder (Re ~ 105, M∞ ~ 0.25) indicate flow reversal. The measured recovery temperature, expressed as distribution of energy separation factor indicates that energy separation is caused by the vortex flow in the wake, enhanced by acoustic excitation, and is insensitive to Reynolds number in the sub critical range studied. |
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