Vortex dynamics in a model of superflow: The role of acoustic excitations

1995 ◽  
Vol 52 (10) ◽  
pp. R7018-R7021 ◽  
Author(s):  
Michael Abraham ◽  
Igor Aranson ◽  
Barak Galanti
Keyword(s):  
Vortex Dynamics ◽  
Acoustic Excitations

The role of rotary motion on vortices in reverse flow

2019 ◽  
Vol 880 ◽  
pp. 723-742 ◽  
Author(s):  
Luke R. Smith ◽  
Yong Su Jung ◽  
James D. Baeder ◽  
Anya R. Jones
Keyword(s):  
Vortex Dynamics ◽  
Reverse Flow ◽  
Three Dimensional ◽  
Flow Region ◽  
Vortex Method ◽  
Forward Flight ◽  
Vorticity Transport ◽  
Rotating Wing ◽  
Rotary Wing

The physics of a rotary wing in forward flight are highly complex, particularly when flow separation is involved. The purpose of this work is to assess the role of three-dimensional (3-D) vortex dynamics, with a focus on Coriolis forces, in the evolution of vortices in the reverse flow region of a rotating wing. High-fidelity numerical simulations were performed to recreate the flow about a representative rotating wing in forward flight. A vorticity transport analysis was performed to quantify and compare the magnitudes of 2-D flow physics, vortex tilting and Coriolis effects in the resulting flow fields. Three-dimensional vortex dynamics was found to have a very small impact on the growth and behaviour of vortices in the reverse flow region; in fact, the rate of vortex growth was successfully modelled using a simple 2-D vortex method. The small role of 3-D physics was attributed to the Coriolis and vortex tilting terms being approximately equal and opposite to one another. This ultimately lead to vortex behaviour that more closely resembled a surging wing as opposed to a conventional rotating wing, a feature unique to the reverse flow region.

scholarly journals Role of Twin Boundaries on the Vortex Dynamics inYBa2Cu3O7

1999 ◽  
Vol 83 (5) ◽  
pp. 1026-1029 ◽  
Author(s):  
H. Pastoriza ◽  
S. Candia ◽  
G. Nieva
Keyword(s):  
Vortex Dynamics ◽  
Twin Boundaries

scholarly journals ON THE ROLE OF MESOSCALE VORTICES IN THE OIL SPILL TRANSPORT IN THE SOUTH-EASTERN BALTIC SEA (SATELLITE INFORMATION)

2019 ◽  
Vol 47 (3) ◽  
pp. 8-19 ◽  
Author(s):  
A. I. Ginzburg ◽  
E. V. Krek ◽  
A. G. Kostianoy ◽  
D. M. Soloviev
Keyword(s):  
Vortex Dynamics ◽  
Vortex Motion ◽  
Landsat 8 ◽  
Radar Images ◽  
Optical Images ◽  
Total Transport ◽  
First Time ◽  
Vortex Movement ◽  
Eastern Baltic

In this paper, on the basis of an analysis of the successive satellite optical images (MODISAqua, TIRS Landsat-8, AVHRR NOAA-18) and radar images (SAR-C Sentinel-1A, SAR-C Radarsat-2) on June 8–11, 2015, the effect of the mesoscale vortex movement (anticyclone with diameter of 35 km and associated cyclone) on the transport of oil spots in the northern part of the Gdansk Bay was demonstrated for the first time. The velocities of this transport are estimated; the observed picture of the movement of the spots is compared with their transfer according to the Seatrack Web model. The largest (about 20 cm/s) drift velocity corresponded to the spot that appeared near the periphery of the anticyclonic vortex (the region of maximum velocities), the smallest one was at the spot near the center of the vortex. At a wind speed of not more than 5 m/s on June 10 and an assumed orbital velocity of the anticyclone of the order of 20 cm/s, the contribution of the vortex motion to the total transport of the spots under the influence of wind and vortex should be decisive. The observed drift of the spots did not correspond to the forecast of their movement by the Seatrack Web numerical model, which did not take into account the vortex dynamics of the waters.

scholarly journals The Role of Micro Vortex in the Environmental and Biological Processes

2020 ◽  
Author(s):  
Benjamin Oyegbile ◽  
Brian Oyegbile ◽  
Guven Akdogan
Keyword(s):  
Turbulent Flows ◽  
Vortex Dynamics ◽  
Biological Systems ◽  
Particle Interaction ◽  
Short Review ◽  
Liquid Suspension ◽  
Potential Applications ◽  
Complex Fluid ◽  
Solid Liquid

This work presents a short review of the theoretical developments in the application of vortex dynamics to the processing of environmental and biological systems. The mechanisms of complex fluid-particle interaction in vortex dominated and non-vortex dominated flows are briefly discussed from theoretical and practical perspectives. Micro vortex propagation, characteristics and their various applications in environmental process engineering are briefly discussed. Several existing and potential applications of vortex dynamics in turbulent flows are highlighted and as well as the knowledge gaps in the current understanding of turbulence phenomenon with respect to its applications in the processing of solid-liquid suspension and biological systems.

scholarly journals Local Scour at Bridge Piers: The Role of Reynolds Number on Horseshoe Vortex Dynamics

2010 ◽  
Author(s):  
N. Apsilidis ◽  
P. Diplas ◽  
C. L. Dancey ◽  
P. P. Vlachos ◽  
S. G. Raben
Keyword(s):  
Reynolds Number ◽  
Vortex Dynamics ◽  
Horseshoe Vortex ◽  
Local Scour ◽  
Bridge Piers

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management

The power of norms to sway fused group members

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam
Keyword(s):  
Evolutionary Anthropology ◽  
Normative Systems ◽  
Violent Extremism ◽  
Identity Fusion ◽  
Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

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