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Enhanced mixing at inertial microscales using flow-induced flutter

Aaron Rips and Rajat Mittal

  • Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA

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Phys. Rev. Fluids 4, 054501 – Published 6 May, 2019

DOI: https://doi.org/10.1103/PhysRevFluids.4.054501

Abstract

Numerical simulations are used to explore the use of flow-induced flutter of a membrane as a mechanism for effective mixing at inertial microscales. A simple two-dimensional model of mixing in a channel is employed and fluid-structure interaction modeling with an immersed boundary method-based solver is used to explore the flow physics, flutter dynamics, and scalar mixing of these flutter mixers. The performance of the mixers is characterized in terms of a mixing index and a nondimensional head loss, and the effect of Reynolds and Schmidt numbers, as well as the membrane length on these performance indices, is examined. Simulations indicate that flow-induced flutter is capable of significantly enhancing mixing for channel Reynolds numbers as low as 15 and the relatively low associated pressure loss might make these flutter mixers a viable alternative for such applications.

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Phys. Rev. Fluids 4, 054501– Published 6 May, 2019
  • Received 17 September 2018
Article part of CHORUS
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