Info
On behalf of the European Association for the Control of Structures, the organizers of the European conference on structural control and the partners of the SureROB project would like to invite you to attend a talk on "Flow–phonon interaction: Vibration engineering as a new frontier in flow control".
Flow–phonon interaction: Vibration engineering as a new frontier in flow control
Prof. Mahmoud Hussein, University of Colorado, United States (Short bio here: https://www.colorado.edu/aerospace/mahmoud-hussein )
Abstract
Flow control over surfaces is a long-standing engineering challenge with broad implications for transportation, energy, and industrial systems. For vehicles and other streamlined bodies moving through air or water, a central objective is to manage the growth of flow instabilities that can trigger laminar-to-turbulent transition, sharply increasing drag and reducing efficiency. In other settings, the opposite goal arises, namely to promote instability growth in order to delay or prevent flow separation. Phonics is a contemporary field devoted to understanding and harnessing mechanical vibrations in artificially structured materials. By tailoring how these materials respond to waves, phononics offers new opportunities to shape physical behavior in ways not attainable with conventional structures/
In this talk, I will present an emerging paradigm, proposed by our group in 2015, that merges the two fields and establishes intrinsic vibration engineering as a new route to flow control. The central idea is to engineer vibrations beneath a flow-exposed surface so that they passively couple into the fluid and alter its dynamics in a favorable way. These engineered structures, called phononic subsurfaces (PSubs), enable control through precise coordination between structural motion and fluid response. I will conclude by highlighting our recent advances, including downstream control using PSub lattices and broadband control using a super-resonant PSub.
Head over to the conference website for more information. We look forward to your attendance!
