Compressibility in suddenly expanded subsonic flows

Konstantinos Karantonis, Ioannis W. Kokkinakis, Ben Thornber, Dimitris Drikakis

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish
    Article number105106
    JournalPhysics of Fluids
    Issue number10
    Publication statusPublished - 1 Oct 2021


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