Experimental study of interactions between turbulent structures and poro-elastic surfaces

Abstract eng:
This work aims to study experimentally the interaction of fibrous poro-elastic surfaces with wall-bounded turbulent flows. We fabricate the coatings using Off-Stoichiometry-Thiolene-Epoxy (OSTE+) polymers and multidirectional UV—lithography. We assess the ef- fects of these coatings on an overlying low-Reynolds number turbulent flow using a water-table facility and PIV measurements. In particular, we focus on the modification of near wall turbulent structures in both space and time due to the presence of the poroelastic coatings. The overall goal is to classify stabilizing and destabilizing fluid-structure interaction mechanisms of turbulent flows over poroelastic surfaces.

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