Proc Math Phys Eng Sci. 2015 May 08;471(2177):20140928. doi: 10.1098/rspa.2014.0928.

Flow stabilization by subsurface phonons.

Proceedings. Mathematical, physical, and engineering sciences

M I Hussein, S Biringen, O R Bilal, A Kucala

PMID: 27547095 PMCID: PMC4984922 DOI: 10.1098/rspa.2014.0928

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.

Keywords: flow control; flow instability; fluid–structure interaction; phonon band structure; phononic materials; phononics

References

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Publication Types

• Journal Article