This paper concerns implicit large eddy simulations of subsonic flows through a symmetric suddenly expanded channel. We aim at shedding light on the flow physics at a relatively high Reynolds number of 10 000, based on the inlet bulk velocity and the step height of the channel, and examine the compressibility effects for two Mach numbers, Ma = 0.1 and Ma = 0.5. Comparisons with experimental measurements are provided. In addition, we investigate the structure of the separated regions, turbulence structures—through the Reynolds stress anisotropy componentality—and turbulence kinetic energy budgets. The results reveal that compressibility influences particular flow physics.
Compressibility in suddenly expanded subsonic flows
Note: This paper is part of the special topic, Tribute to Frank M. White on his 88th Anniversary.
Konstantinos Karantonis, Ioannis W. Kokkinakis, Ben Thornber, Dimitris Drikakis; Compressibility in suddenly expanded subsonic flows. Physics of Fluids 1 October 2021; 33 (10): 105106. https://doi.org/10.1063/5.0065257
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