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- W4281289072 abstract "Direct numerical simulations of turbulent flow in a channel with one rigid and one viscoelastic wall are performed. An Eulerian–Eulerian model is adopted with a level-set approach to identify the fluid–compliant material interface. Focus is placed on the propagation of Rayleigh waves in the compliant material, whose speed depends on the shear modulus of elasticity and whose dominant wavelength depends on the thickness of the viscoelastic layer. These parameters are selected to ensure coupling between the compliant surface and turbulence. When the phase speed of Rayleigh waves is commensurate with the advection velocity of near-wall pressure fluctuations, sheets of vorticity are lifted up and detached near the critical layer and lead to a local pressure minimum. These events are caused by the inflectional velocity profile near the troughs, and are controlled by the net vorticity flux at the elastic surface. This phenomenon is central to understanding the statistical characteristics of the flow, including the surface deformation–pressure correlation and enhanced stochastic Reynolds shear stresses. Finally, we discuss the influence of three-dimensionality of the surface topography on the generation of streamwise vorticity, secondary motions and lateral turbulent transport." @default.
- W4281289072 created "2022-05-24" @default.
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- W4281289072 creator A5040500034 @default.
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- W4281289072 date "2022-05-23" @default.
- W4281289072 modified "2023-09-25" @default.
- W4281289072 title "Spatiotemporal characterization of turbulent channel flow with a hyperelastic compliant wall" @default.
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- W4281289072 doi "https://doi.org/10.1017/jfm.2022.354" @default.
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