Micro-PIV measurements of flows induced by rotating microparticles near a boundary

Two-Color μ-PIV is developed and used to uniquely determine the fluid velocity based on the micron-resolution Particle Image Velocimetry (μ-PIV) technique [1–3]. The fluid velocity field was obtained by measuring the motion of two different sizes particles, 0.7 and 1.0 μm. The different sizes of particles contain different fluorescent dyes, allowing them to be distinguished using fluorescent filter cubes. By comparing the velocity fields from the two different size particles, the underlying fluid motion can be uniquely determined, without a priori knowledge of the electrical properties of the particles, or the electrical field. The test section is formed by two wedge-shaped electrodes sandwiched between two glass wafers. In the presence of nonuniform ac electric fields, the particles experience dielectrophoretic (DEP) forces due to polarization and drag forces due to viscous interaction with the suspending medium, and the fluid motion is induced by the electrothermal effect and/or ac electroosmosis. The micro-PIV measurements are used to determine quantitatively the physical characteristics of the AC electrokinetic effects.

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Development and Analysis of Wall Models for Internal Combustion Engine Simulations Using High-speed Micro-PIV Measurements

Flow Turbulence and Combustion ◽

10.1007/s10494-016-9734-5 ◽

2016 ◽

Vol 98 (1) ◽

pp. 283-309 ◽

Cited By ~ 28

Author(s):

Peter C. Ma ◽

Tim Ewan ◽

Christopher Jainski ◽

Louise Lu ◽

Andreas Dreizler ◽

...

Keyword(s):

Internal Combustion Engine ◽

High Speed ◽

Combustion Engine ◽

Internal Combustion ◽

Piv Measurements ◽

Micro Piv ◽

Wall Models

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Micro-PIV Measurements in Micro-Tubes and Proboscis of Mosquito

Journal of Fluid Science and Technology ◽

10.1299/jfst.3.975 ◽

2008 ◽

Vol 3 (8) ◽

pp. 975-986 ◽

Cited By ~ 10

Author(s):

Kenji KIKUCHI ◽

Osamu MOCHIZUKI

Keyword(s):

Piv Measurements ◽

Micro Piv

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Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization

Lab on a Chip ◽

10.1039/c1lc20637k ◽

2011 ◽

Vol 11 (24) ◽

pp. 4152 ◽

Cited By ~ 95

Author(s):

Per Augustsson ◽

Rune Barnkob ◽

Steven T. Wereley ◽

Henrik Bruus ◽

Thomas Laurell

Keyword(s):

Piv Measurements ◽

Micro Piv ◽

Temperature Controlled

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Micro-PIV measurements of blood flow in extraembryonic blood vessels of chicken embryos

Physiological Measurement ◽

10.1088/0967-3334/28/10/002 ◽

2007 ◽

Vol 28 (10) ◽

pp. 1149-1162 ◽

Cited By ~ 43

Author(s):

Jung Yeop Lee ◽

Ho Seong Ji ◽

Sang Joon Lee

Keyword(s):

Blood Flow ◽

Blood Vessels ◽

Piv Measurements ◽

Chicken Embryos ◽

Micro Piv

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A Translating Stage System for Micro-PIV Measurements Surrounding a Migrating Semi-Infinite Bubble

ASME 2009 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2009-204683 ◽

2009 ◽

Author(s):

Bradford J. Smith ◽

Eiichiro Yamaguchi ◽

Donald P. Gaver

Keyword(s):

Capillary Tube ◽

Region Of Interest ◽

Glass Capillary ◽

Free System ◽

Piv Measurements ◽

Airway Reopening ◽

Micro Particle Image Velocimetry ◽

Micro Piv ◽

Stage System ◽

Airway Walls

We have designed, created, and evaluated a translating stage system (TSS) used for Micro Particle Image Velocimetry (μ-PIV) measurements surrounding the tip of a migrating semi-infinite bubble in a glass capillary tube. This study is relevant to acute respiratory distress syndrome (ARDS), which is characterized by pulmonary airway collapse and fluid occlusion. Subsequent airway reopening, driven by mechanical ventilation, may generate damaging mechanical stresses on the airway walls that can result in ventilator-induced lung injury (VILI). Our goal in this study is to characterize and demonstrate a system for mechanically canceling the mean forward velocity of a migrating bubble, allowing continuous measurement near the tip region of interest. This system will be used to validate our previous boundary element computations in a surfactant-free system [1] and further explore airway reopening phenomenon related to surfactant physiochemical interaction.

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