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Title: Three-dimensional soft streaming
Viscous streaming is an efficient rectification mechanism to exploit flow inertia at small scales for fluid and particle manipulation. It typically entails a fluid vibrating around an immersed solid feature that, by concentrating stresses, modulates the emergence of steady flows of useful topology. Motivated by its relevance in biological and artificial settings characterized by soft materials, recent studies have theoretically elucidated, in two dimensions, the impact of body elasticity on streaming flows. Here, we generalize those findings to three dimensions, via the minimal case of an immersed soft sphere. We first improve existing solutions for the rigid-sphere limit, by considering previously unaccounted terms. We then enable body compliance, exposing a three-dimensional, elastic streaming process available even in Stokes flows. Such effect, consistent with two-dimensional analyses but analytically distinct, is validated against direct numerical simulations and shown to translate to bodies of complex geometry and topology, paving the way for advanced forms of flow control.  more » « less
Award ID(s):
1846752
PAR ID:
10586104
Author(s) / Creator(s):
; ;
Publisher / Repository:
Journal of Fluid Mechanics
Date Published:
Journal Name:
Journal of Fluid Mechanics
Volume:
979
ISSN:
0022-1120
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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