Journal ArticleDOI
Twenty years of particle image velocimetry
TLDR
The development of the method of particle image velocimetry (PIV) is traced by describing some of the milestones that have enabled new and/or better measurements to be made.Abstract:
The development of the method of particle image velocimetry (PIV) is traced by describing some of the milestones that have enabled new and/or better measurements to be made. The current status of PIV is summarized, and some goals for future advances are addressed.read more
Citations
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Journal ArticleDOI
Cytoplasmic flows in starfish oocytes are fully determined by cortical contractions.
Nils Klughammer,Johanna Bischof,Nikolas D Schnellbächer,Andrea Callegari,Péter Lénárt,Ulrich S. Schwarz +5 more
TL;DR: This work shows that cytoplasmic flows in starfish oocytes are fully determined by the cortical dynamics during surface contraction waves, and calculates the pressure field inside the oocyte and finds that its gradient is too small as to explain polar body extrusion, in contrast to earlier suggestions.
Journal ArticleDOI
Quantification of the bed load effects on turbulent open-channel flows
TL;DR: In this paper, a computational model combining large eddy simulation and a discrete element model is presented to quantify the impact of bed load particle impact on turbulent open-channel flows and coherent structures.
Journal ArticleDOI
Optical plume velocimetry: a new flow measurement technique for use in seafloor hydrothermal systems
TL;DR: In this article, optical plume velocimetry (OPV) is used for obtaining fluid flow rates through black smoker vents based on image analysis of effluent video. But, OPV is most sensitive and least biased when the cross-correlation method is used and conclude that OPV should not be applied to flows that are transitioning between jetlike and plume-like behavior.
Journal ArticleDOI
Life in turbulent flows: interactions between hydrodynamics and aquatic organisms in rivers
TL;DR: A review of the two-way interactions between aquatic biota and hydrodynamics in rivers, and key methodological approaches used in their quantification, to encourage more explicit consideration of the importance of turbulence in river science and management is presented in this article.
DissertationDOI
An arbitrary Lagrangian-Eulerian method for penetration into sand at finite deformation
TL;DR: In this paper, an operator-split operator is used to break up the solution of the governing equations over a time step into a Lagrangian step, a mesh regularization step, and a transport step.
References
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Book
Particle Image Velocimetry: A Practical Guide
TL;DR: In this paper, the authors present a practical guide for the planning, performance and understanding of experiments employing the PIV technique, which is primarily intended for engineers, scientists and students, who already have some basic knowledge of fluid mechanics and nonintrusive optical measurement techniques.
Journal ArticleDOI
Digital Particle Image Velocimetry
Christian Willert,Morteza Gharib +1 more
TL;DR: In this article, the directional ambiguity associated with PIV and LSV is resolved by implementing local spatial cross-correlations between two sequential single-exposed particle images, and the recovered velocity data are used to compute the spatial and temporal vorticity distribution and the circulation of the vortex ring.
Book ChapterDOI
Particle Image Velocimetry
TL;DR: In this paper, the authors use hot-wire (HW) or laser velocimetry (LV) to estimate the velocity, vorticity, and pressure fields of wake flows.
Journal ArticleDOI
Determination of displacements using an improved digital correlation method
TL;DR: An improved digital correlation method is presented for obtaining the full-field in-plane deformations of an object by numerically correlating a selected subset from the digitized intensity pattern of the undeformed object.
Journal ArticleDOI
Fundamentals of digital particle image velocimetry
TL;DR: In this paper, the measurement principle of digital particle image velocimetry (PIV) is described in terms of linear system theory and conditions for PIV correlation analysis as a valid interrogation method are determined.