Possible role of steady streaming flows in fish hearing.

2009 ◽  
Vol 126 (4) ◽  
pp. 2241
Author(s):  
Charlotte W. Kotas ◽  
Peter H. Rogers ◽  
Minami Yoda
Keyword(s):  
Steady Streaming ◽  
Fish Hearing ◽  
Streaming Flows

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

2007 ◽  
Vol 122 (5) ◽  
pp. 3004
Author(s):  
Charlotte W. Kotas ◽  
Peter H. Rogers ◽  
Minami Yoda
Keyword(s):  
Steady Streaming ◽  
Streaming Flows

THE ROLE OF STEADY STREAMING IN SHEETFLOW TRANSPORT

2011 ◽  
pp. 902-909
Author(s):  
KYIKYI LWIN ◽  
HAIJIANG LIU ◽  
SHINJI SATO
Keyword(s):  
Steady Streaming

Two-dimensional streaming flows driven by sessile semicylindrical microbubbles

2013 ◽  
Vol 739 ◽  
pp. 57-71 ◽  
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.

Steady streaming flows near spheroids oscillated at multiple frequencies

2008 ◽  
Vol 45 (2) ◽  
pp. 295-307 ◽  
Author(s):  
Charlotte W. Kotas ◽  
Minami Yoda ◽  
Peter H. Rogers
Keyword(s):  
Steady Streaming ◽  
Multiple Frequencies ◽  
Streaming Flows

LDA measurements of steady streaming flows of Newtonian and viscoelastic fluids

1995 ◽  
Vol 20 (1) ◽  
pp. 21-28 ◽  
Author(s):  
D. Vlassopoulos ◽  
W. R. Schowalter
Keyword(s):  
Viscoelastic Fluids ◽  
Steady Streaming ◽  
Streaming Flows

Three-dimensional streaming flow in confined geometries

2015 ◽  
Vol 777 ◽  
pp. 408-429 ◽  
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.

From steady streaming to oscillations: the role of subglacial drainage and temperate ice in ice-stream dynamics

2021 ◽  
Author(s):  
Marianne Haseloff ◽  
Ian Hewitt ◽  
Richard Katz
Keyword(s):  
Heat Dissipation ◽  
Lateral Strain ◽  
Hydraulic Permeability ◽  
Ice Streams ◽  
Steady Streaming ◽  
Ice Stream ◽  
Fast Flow ◽  
Stream Bed ◽  
Subglacial Drainage

<p>The majority of Antarctic ice is discharged through fast-flowing ice streams. Some of these ice streams exhibit variations in velocities and ice stream discharge on decadal to centennial time scales, but the factors controlling these variations are still insufficiently understood.  Using computational models of ice flow and hydrology, we predict the existence of two dynamical regimes: stable ice streaming associated with high hydraulic permeability of the bed, and ‘binge-purge’ oscillations associated with low permeability.</p><p>Observations indicate that the fast-flow of ice streams is enabled by meltwater lubricating the ice stream bed, and models suggest that this lubrication is the result of a positive feedback between fast flow, heat dissipation at the ice stream bed and meltwater production within the ice. In particular, recent studies have highlighted that heat dissipation in temperate ice stream margins, which are regions of high lateral strain, can contribute significantly to the subglacial water balance. However, the role of this meltwater flux in ice stream dynamics remains unclear. Here, we investigate the roles of subglacial drainage and feedbacks between fast flow and heat dissipation in ice-stream evolution. </p><p>The ice is modelled as a vertically uniform plug flow. Water flow at the bed is modelled as a Darcian system whose hydraulic transmissivity increases with decreasing effective pressure. Dynamical feedbacks in the energy balance include both frictional heating along the bed and lateral shear heating. Within our model, two distinct dynamic regimes can be identified: if the hydraulic permeability of the bed is sufficiently high to evacuate all meltwater produced at the ice stream bed and in its margins, a moderately-fast steady ice stream forms. Conversely,`binge-purge’ oscillations between fast and stagnant flow emerge when the hydraulic permeability of the bed is too low to evacuate the meltwater produced within the ice stream. Topographic controls can suppress this oscillatory behaviour, while the formation of temperate ice in ice stream margins amplifies it.</p>

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