Affiliation:
1. Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
Abstract
The interaction between a fluid and a solid surface in relative motion represents a dynamical process that is central to the problem of laminar-to-turbulent transition (and consequent drag increase) for air, sea and land vehicles, as well as long-range pipelines. This problem may in principle be alleviated via a control stimulus designed to impede the generation and growth of instabilities inherent in the flow. Here, we show that phonon motion underneath a surface may be tuned to passively generate a spatio-temporal elastic deformation profile at the surface that counters these instabilities. We theoretically demonstrate this phenomenon and the underlying mechanism of frequency-dependent destructive interference of the unstable flow waves. The converse process of flow destabilization is illustrated as well. This approach provides a condensed-matter physics treatment to fluid–structure interaction and a new paradigm for flow control.
Subject
General Physics and Astronomy,General Engineering,General Mathematics
Reference43 articles.
1. Flow Control
2. Über den strömungswiderstand einer beheizten ebenen platte;Linke W;Luftfahrtforschung,1942
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39 articles.
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