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Keywords: DPIV
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Journal Articles
J Exp Biol (2016) 219 (14): 2182–2191.
Published: 15 July 2016
... encourage refuging in fish. Vortex street Oncorhynchus   mykiss Kármán gait Flow visualization DPIV CFD Turbulence Swimming Fishes in current-swept environments must successfully navigate complex flows while performing tasks that are essential for survival, such as foraging for prey...
Journal Articles
J Exp Biol (2012) 215 (9): 1456–1463.
Published: 01 May 2012
... velocimetry (DPIV) to compare suction feeding flow dynamics in a representative of each of these clades: goldfish and bluegill. Using DPIV, we contrast the spatial pattern of flow, the temporal relationship between flow and head kinematics, and the contribution of jaw protrusion to the forces exerted on prey...
Journal Articles
J Exp Biol (2011) 214 (7): 1181–1193.
Published: 01 April 2011
... 10504, USA ( rcarlson4@fordham.edu ) 3 12 2010 © 2011. 2011 DPIV digital particle image velocimetry fish fluid dynamics pectoral fin substrate vorticity Lotic, or flowing water, environments such as creeks, streams and rivers are characterized by measurable directional...
Journal Articles
J Exp Biol (2011) 214 (3): 382–393.
Published: 01 February 2011
... using stereo digital particle image velocimetry (DPIV). The main structures of the wake were a pair of trailing wingtip vortices and a pair of trailing tail vortices. Circulation of these was measured and a model was constructed that showed good weight support. Parasite drag was estimated from the wake...
Journal Articles
J Exp Biol (2009) 212 (20): 3365–3376.
Published: 15 October 2009
... high-speed DPIV measurements in the transverse plane behind freely flying blackcaps. We found novel wake structures previously not shown in birds, including wing root vortices of opposite as well as the same sign as the wing tip vortices. This suggests a more complex wake structure in birds than...
Includes: Supplementary data
Journal Articles
J Exp Biol (2008) 211 (19): 3095–3102.
Published: 01 October 2008
... of feeding sharks was quantified using time-resolved digital particle image velocimetry (DPIV). The maximal size of the fluid velocity region is 56%larger in successful strikes than unsuccessful strikes (10.79 cm 2 vs 6.90 cm 2 ), but they do not differ in duration,indicating that strikes are...
Journal Articles
J Exp Biol (2008) 211 (18): 2909–2918.
Published: 15 September 2008
... Pretoria, South Africa 8 7 2008 © The Company of Biologists Limited 2008 2008 bats Glossophaga soricina flight aerodynamics wake DPIV The wake behind animals may form relatively simple shapes as suggested by numerous bird studies ( Hedenström et al., 2006a...
Includes: Supplementary data
Journal Articles
J Exp Biol (2008) 211 (2): 196–205.
Published: 15 January 2008
... interaction between fish and water. To study the influence of the relatively high viscous forces compared with adult fish, we mapped the flow around swimming zebrafish ( Danio rerio ) larvae using two-dimensional digital particle image velocimetry (2D-DPIV) in the horizontal and transverse plane of the fish...
Journal Articles
J Exp Biol (2006) 209 (17): 3281–3287.
Published: 01 September 2006
... mouth are understood to be mechanically linked but the relationship between them has never been empirically determined in any suction feeder. We present the first simultaneous measurements of fluid speed and buccal pressure during suction feeding in fishes. Digital particle image velocimetry (DPIV)and...
Journal Articles
J Exp Biol (2006) 209 (14): 2713–2725.
Published: 15 July 2006
... rate. We also calculated the ingested volume and a novel metric of strike accuracy. In addition, we quantified for each species the effects of gape magnitude, time to peak gape, and swimming speed on features of the ingested volume of water. Digital particle image velocimetry (DPIV) and high-speed...
Journal Articles
J Exp Biol (2005) 208 (14): 2661–2671.
Published: 15 July 2005
... relationship between the rate of buccal cavity expansion and maximum generated flow speed. * Author for correspondence (e-mail: sday@alumni.virginia.edu ) 24 5 2005 © The Company of Biologists Limited 2005 2005 DPIV suction feeding Centrarchidae sunfish Lepomis macrochirus...
Journal Articles
J Exp Biol (2005) 208 (14): 2653–2660.
Published: 15 July 2005
... effects of ram on the maximum fluid speed of the water entering the mouth during feeding as well as the spatial patterns of flow entering the mouth of suction-feeding bluegill sunfish Lepomis macrochirus . Using Digital Particle Image Velocimetry (DPIV) and high-speed video, we observed the flow in front...
Journal Articles
J Exp Biol (2005) 208 (8): 1445–1451.
Published: 15 April 2005
... Rana esculenta , applying digital particle image velocimetry (DPIV) to the frog's wake. The wake showed two vortex rings left behind by the two feet. The rings appeared to be elliptic in planform, urging for correction of the observed ring radii. The rings' long and short axes (average ratio 1.75:1...
Journal Articles
J Exp Biol (2005) 208 (8): 1435–1443.
Published: 15 April 2005
... swimming. To explore this difference further, we determined the instantaneous forces during propulsion in swimming using an impulse–momentum approach based on DPIV flow data. The force profile obtained was compared with force profiles obtained from drag–thrust equilibrium of the centre of mass and with the...
Journal Articles
J Exp Biol (2005) 208 (6): 1079–1094.
Published: 15 March 2005
...Richard J. Bomphrey; Nicholas J. Lawson; Nicholas J. Harding; Graham K. Taylor; Adrian L. R. Thomas SUMMARY Here we present the first digital particle image velocimetry (DPIV)analysis of the flow field around the wings of an insect (the tobacco hawkmoth Manduca sexta , tethered to a 6-component...
Journal Articles
J Exp Biol (2005) 208 (6): 1125–1146.
Published: 15 March 2005
... jet velocity and other jet parameters in squid have been reported. We used digital particle imaging velocimetry (DPIV) to visualize the jet flow of adult long-finned squid Loligo pealei (mantle length, L m =27.1±3.0 cm, mean ± s . d .) swimming in a flume over a wide range of speeds(10.1-59.3 cm s -1...
Journal Articles
J Exp Biol (2004) 207 (26): 4707–4726.
Published: 15 December 2004
... insect flight aerodynamics DPIV leading edge vortex wake dragonfly Functionally four-winged insects such as dragon- and damselflies use a large variety of wingbeat kinematics to produce and control aerodynamic forces for flight ( Alexander, 1984 ; Azuma et al., 1985 ; Azuma and Watanabe...
Journal Articles
J Exp Biol (2004) 207 (22): 3945–3958.
Published: 15 October 2004
... (DPIV) to quantify the flow structure of the wake produced by the feet during the propulsion phase of the kick of surface swimming frogs( Rana pipiens ). These frogs use two different gaits, asynchronous and synchronous kicking, and the magnitude of the thrust produced by the feet differs between...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2003) 206 (13): 2257–2272.
Published: 01 July 2003
...James M. Birch; Michael H. Dickinson SUMMARY We used two-dimensional digital particle image velocimetry (DPIV) to visualize flow patterns around the flapping wing of a dynamically scaled robot for a series of reciprocating strokes starting from rest. The base of the wing was equipped with strain...