LDA measurements of steady streaming flows of Newtonian and viscoelastic fluids

D. Vlassopoulos; W. R. Schowalter

doi:10.1007/bf00190594

LDA measurements of steady streaming flows of Newtonian and viscoelastic fluids

Experiments in Fluids ◽

10.1007/bf00190594 ◽

1995 ◽

Vol 20 (1) ◽

pp. 21-28 ◽

Cited By ~ 2

Author(s):

D. Vlassopoulos ◽

W. R. Schowalter

Keyword(s):

Viscoelastic Fluids ◽

Steady Streaming ◽

Streaming Flows

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Effects of otolith geometry on steady streaming flows in the fish ear

The Journal of the Acoustical Society of America ◽

10.1121/1.2942726 ◽

2007 ◽

Vol 122 (5) ◽

pp. 3004

Author(s):

Charlotte W. Kotas ◽

Peter H. Rogers ◽

Minami Yoda

Keyword(s):

Steady Streaming ◽

Streaming Flows

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Possible role of steady streaming flows in fish hearing.

The Journal of the Acoustical Society of America ◽

10.1121/1.3249207 ◽

2009 ◽

Vol 126 (4) ◽

pp. 2241

Author(s):

Charlotte W. Kotas ◽

Peter H. Rogers ◽

Minami Yoda

Keyword(s):

Steady Streaming ◽

Fish Hearing ◽

Streaming Flows

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Two-dimensional streaming flows driven by sessile semicylindrical microbubbles

Journal of Fluid Mechanics ◽

10.1017/jfm.2013.616 ◽

2013 ◽

Vol 739 ◽

pp. 57-71 ◽

Cited By ~ 25

Author(s):

Bhargav Rallabandi ◽

Cheng Wang ◽

Sascha Hilgenfeldt

Keyword(s):

Asymptotic Theory ◽

Vortex Pair ◽

Driving Frequency ◽

Control Parameters ◽

High Frequencies ◽

Steady Streaming ◽

Wall Boundary Conditions ◽

Oscillation Modes ◽

Streaming Flows ◽

Streaming Flow

AbstractSteady streaming flow from oscillating sessile bubbles at walls is the centrepiece of many microstreaming experiments. A complete asymptotic theory of the flow is developed, requiring only the oscillatory driving frequency and material parameters as input, and properly accounting for bubble and wall boundary conditions. It is shown that mixed-mode streaming of neighbouring bubble oscillation modes is responsible for the robustness of the generic ‘fountain’ vortex pair flow pattern, and that the pattern reverses for high frequencies when wall-induced streaming becomes dominant. The far-field flow and its dependence on control parameters are in agreement with experimental data and can be understood considering just a few asymptotic coefficients.

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Steady streaming flows near spheroids oscillated at multiple frequencies

Experiments in Fluids ◽

10.1007/s00348-008-0479-3 ◽

2008 ◽

Vol 45 (2) ◽

pp. 295-307 ◽

Cited By ~ 9

Author(s):

Charlotte W. Kotas ◽

Minami Yoda ◽

Peter H. Rogers

Keyword(s):

Steady Streaming ◽

Multiple Frequencies ◽

Streaming Flows

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Three-dimensional streaming flow in confined geometries

Journal of Fluid Mechanics ◽

10.1017/jfm.2015.336 ◽

2015 ◽

Vol 777 ◽

pp. 408-429 ◽

Cited By ~ 14

Author(s):

Bhargav Rallabandi ◽

Alvaro Marin ◽

Massimiliano Rossi ◽

Christian J. Kähler ◽

Sascha Hilgenfeldt

Keyword(s):

Time Scales ◽

Vortex Motion ◽

Three Dimensional ◽

Two Dimensional ◽

Hamiltonian Description ◽

Steady Streaming ◽

Dimensional Flow ◽

Time Flow ◽

Two Dimensional Flow ◽

Streaming Flows

Steady streaming vortex flow from microbubbles has been developed into a versatile tool for microfluidic sample manipulation. For ease of manufacture and quantitative control, set-ups have focused on approximately two-dimensional flow geometries based on semi-cylindrical bubbles. The present work demonstrates how the necessary flow confinement perpendicular to the cylinder axis gives rise to non-trivial three-dimensional flow components. This is an important effect in applications such as sorting and micromixing. Using asymptotic theory and numerical integration of fluid trajectories, it is shown that the two-dimensional flow dynamics is modified in two ways: (i) the vortex motion is punctuated by bursts of strong axial displacement near the bubble, on time scales smaller than the vortex period; and (ii) the vortex trajectories drift over time scales much longer than the vortex period, forcing fluid particles onto three-dimensional paths of toroidal topology. Both effects are verified experimentally by quantitative comparison with astigmatism particle tracking velocimetry (APTV) measurements of streaming flows. It is further shown that the long-time flow patterns obey a Hamiltonian description that is applicable to general confined Stokes flows beyond microstreaming.

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