Results 151 to 160 of about 18,661 (201)
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Experiments in Fluids, 2000
A non-post-interrogation method of reducing subpixel errors and eliminating spurious vectors from particle image velocimetry (PIV) results is presented. Unlike methods that rely on the accuracy or similarity of neighboring vectors, errors are eliminated before correlation information is discarded using available spatial and/or temporal data.
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A non-post-interrogation method of reducing subpixel errors and eliminating spurious vectors from particle image velocimetry (PIV) results is presented. Unlike methods that rely on the accuracy or similarity of neighboring vectors, errors are eliminated before correlation information is discarded using available spatial and/or temporal data.
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Guidelines for the Authorization of PIV Card and Derived PIV Credential Issuers
2023The document provides appropriate and useful guidelines for assessing the reliability of issuers of PIV Cards and derived PIV credentials. These issuers store personal information and issue credentials based on OMB policies and the standards published in response to HSPD-12. The reliability of an issuer is of utmost importance when an organization (e.g.
Hildegard Ferraiolo +3 more
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Acoustic PIV: Measurement of the acoustic particle velocity using synchronized PIV-technique
The Journal of the Acoustical Society of America, 2008This paper outlines a technique for measuring the acoustic particle velocity and the flow field simultaneously by applying synchronized particle image velocimetry (PIV). As test set-up a squared acrylic glass chamber was chosen. One side of the test section is connected to a loudspeaker, which allows a sinusoidal excitation of the chamber. To point out
Fischer, A., Sauvage, E., Röhle, I.
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Analysis of stereoscopic PIV measurements using synthetic PIV images
2004This paper describes the use of a synthetic image generator (SIG) for the assessment of the precision of a stereoscopic PIV system. The geometry implemented with the SIG closely matches that of an existing stereo-PIV measurement in laminar pipe flow. The calibration procedure is simulated, which demonstrates the necessity of a careful alignment between
Petracci, A. +3 more
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Local field correction PIV: on the increase of accuracy of digital PIV systems
Experiments in Fluids, 1999Cross-correlation Particle Image Velocimetry (PIV) has become a well known and widely used experimental technique. It has been already documented that difficulties arise resolving velocity structures smaller than the interrogation window. This is caused by signal averaging over this window.
J. Nogueira +2 more
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1998
In this chapter different approaches to PIV recording are introduced. It is important to realize that the various recording methods are not necessarily defined by the recording medium. The same approach may for instance be applied using either photography or digital recording. The PIV recording modes can be separated into two main branches: (1) methods
Markus Raffel +2 more
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In this chapter different approaches to PIV recording are introduced. It is important to realize that the various recording methods are not necessarily defined by the recording medium. The same approach may for instance be applied using either photography or digital recording. The PIV recording modes can be separated into two main branches: (1) methods
Markus Raffel +2 more
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2004
Quantitative Imaging Techniques and Their Application to Wavy Flows (J K Sveen & E A Cowen) PIV Measurements in the Bottom Boundary Layer of the Coastal Ocean (W A M N Smith et al.) Water Wave Induced Boundary Layer Flows Above a Ripple Bed (P L-F Liu et al.) Ship Velocity Fields (J Longo et al.) The Air-Water Interface: Turbulence and Scalar Exchange (
John Grue +2 more
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Quantitative Imaging Techniques and Their Application to Wavy Flows (J K Sveen & E A Cowen) PIV Measurements in the Bottom Boundary Layer of the Coastal Ocean (W A M N Smith et al.) Water Wave Induced Boundary Layer Flows Above a Ripple Bed (P L-F Liu et al.) Ship Velocity Fields (J Longo et al.) The Air-Water Interface: Turbulence and Scalar Exchange (
John Grue +2 more
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Biospeckle PIV and Applications
2014Particle Image Velocimetry PIV has been widely adopted in many areas of science and engineering for measuring the flow in fluids, and the pseudo flow, translational motion, in solids. In both applications, fluids and solids, the necessity for the presence of particles has been solved by the introduction of particles in the samples being monitored.
Roberto Alves Braga +6 more
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Acta crystallographica. Section C, Crystal structure communications
The pseudodipeptide, (S)-N-isopropyl [N-(pivaloyl)pyrrolidin-2-yl]methylaminooxyacetamide, C(15)H(29)N(3)O(3), adopts a global extended conformation with the hydroxylamine group in the g(+)/g(-) structure. The C-terminal amide NH interacts intramolecularly with the hydroxylamine O atom.
, Corbier +4 more
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The pseudodipeptide, (S)-N-isopropyl [N-(pivaloyl)pyrrolidin-2-yl]methylaminooxyacetamide, C(15)H(29)N(3)O(3), adopts a global extended conformation with the hydroxylamine group in the g(+)/g(-) structure. The C-terminal amide NH interacts intramolecularly with the hydroxylamine O atom.
, Corbier +4 more
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Tilted PIV: A novel approach for estimating the turbulent kinetic energy in stirred tanks
Measurement: Journal of the International Measurement Confederation, 2023Jose Roberto Nunhez
exaly