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Keywords: particle image velocimetry
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Journal Articles
J Exp Biol (2021) 224 (14): jeb233635.
Published: 23 July 2021
... the snake's posture were approximated using two-dimensional anatomically accurate airfoils positioned in tandem to mimic the snake's geometry during flight. Load cells were used to measure the lift and drag forces, and flow field data were obtained using digital particle image velocimetry (DPIV). The results...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (12): jeb222083.
Published: 17 June 2021
... recently, novel experimental tools such as high-speed 2D and 3D particle image velocimetry have permitted detailed quantification of the fluid dynamics of aquatic jet propulsion. Here, we provide a comparative analysis of a variety of parameters such as efficiency, kinematics and jet parameters, and review...
Journal Articles
J Exp Biol (2021) 224 (10): jeb230920.
Published: 27 May 2021
... particle image velocimetry, with a horizontal measurement volume placed below the animals, to show that the wake shed by hovering hawkmoths is best described as a series of bilateral, stacked vortex ‘rings’. While the upstroke is aerodynamically active, despite an inclined stroke plane, it produces weaker...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (18): jeb223545.
Published: 28 September 2020
... (NaBi) and particle image velocimetry (PIV) to measure P met and P mech in blackcaps flying in a wind tunnel. We also cross-validated measurements made by NaBi with quantitative magnetic resonance (QMR) body composition analysis in yellow-rumped warblers. We found that P met estimated by NaBi was ∼12...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (16): jeb223230.
Published: 24 August 2020
... that negative mechanical work occurs in posterior regions of the body during early phases of the turn near the time of maximal body curvature. Here, we used a modified particle image velocimetry (PIV) technique to obtain high-resolution flow fields around the zebrafish body during turns. Using detailed swimming...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (15): jeb219873.
Published: 4 August 2020
... of a crayfish tail flip captured during volumetric (3D) particle image velocimetry (PIV). Time zero is designated as the beginning of abdominal straightening. Pleopods (swimmerets) are designated by yellow arrows; U represents the left outer uropod. Fig. 5. Video frames of a crayfish tail flip captured...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (11): jeb201749.
Published: 31 May 2019
.... and Naughton , J. W. ( 2018 ). A photogrammetric approach for masking particle image velocimetry images around moving bodies . Meas. Sci. Technol.   29 , 105203 . 10.1088/1361-6501/aad9c8 Parak , W. J. , Pellegrino , T. and Plank , C. ( 2005 ). Labelling of cells with quantum dots...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (23): jeb190892.
Published: 30 November 2018
... not substantially redirect the force. We quantified the flow patterns using high speed video and particle image velocimetry and measured acceleration with small inertial measurement units attached to each fish. Even in steady tail beats, the fish accelerates slightly during each tail beat, and the magnitude...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (19): jeb183350.
Published: 5 October 2018
... is morphologically distinct from that of silver carp. Using 3D particle image velocimetry, we determined how particles and fluid interact with the surface of the gill rakers/plates. Filtering plates in silver carp induce strong directed vortical flow, whereas the filtering apparatus of bighead carp resulted...
Journal Articles
J Exp Biol (2018) 221 (7): jeb174912.
Published: 12 April 2018
... However, flow can be visualized and quantitatively analyzed using particle image velocimetry (PIV). PIV consists of seeding the fluid with small neutrally buoyant particles, whose tracking enables quantification of the fluid velocity in the visualized area ( Taylor et al., 2014 ). This technique was used...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (21): 3967–3975.
Published: 1 November 2017
... a primarily stabilizing role for shark dorsal fins. We evaluated the generality of this hypothesis by using time-resolved particle image velocimetry to record water flow patterns in the wake of both the anterior and posterior dorsal fins in two species of freely swimming sharks: bamboo sharks ( Chiloscyllium...
Journal Articles
J Exp Biol (2017) 220 (8): 1411–1422.
Published: 15 April 2017
... as a competitive foraging strategy. High-speed video was used to analyze the kinematics and ballistic energetics of the jump. Particle image velocimetry (PIV) was used to understand the roles of the fish's fins during upward propulsion. Combined, these data expand knowledge of a relatively unmentioned aspect...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (10): 1572–1581.
Published: 15 May 2016
... that lift-induced drag increases with wing flexing and with tail use, while tail use also increases body drag. Gliding flight Biomechanics Aerodynamics Wing morphology Particle image velocimetry PIV Wind tunnel Gliding flight in birds is a relatively inexpensive mode of flying, at least...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (9): 1303–1310.
Published: 1 May 2016
... in pre-competent larval sea urchins, Arbacia punctulata . We exposed larval urchins to grid-stirred turbulence and recorded their behavior at two stages (4- and 6-armed plutei) in three turbulence regimes. Using particle image velocimetry to quantify and subtract local flow, we tested the hypothesis...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (16): 2518–2527.
Published: 1 August 2015
... of two species: the diamond dove ( Geopelia cuneata ) and zebra finch ( Taeniopygia guttata ), which exhibit different upstroke styles – a wingtip-reversal and flexed-wing upstroke, respectively. We used a combination of particle image velocimetry and near-wake streamline measures alongside detailed 3D...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (9): 1373–1385.
Published: 1 May 2015
...Kazutaka Yanase; Pentti Saarenrinne ABSTRACT The boundary layers of rainbow trout, Oncorhynchus mykiss , swimming at 1.02±0.09 L s −1 (mean±s.d., N =4), were measured by the particle image velocimetry (PIV) technique at a Reynolds number of 4×10 5 . The boundary layer profile showed unsteadiness...
Journal Articles
J Exp Biol (2014) 217 (24): 4328–4336.
Published: 15 December 2014
... . Biomechanics Lateral line Flow sensing Predation Particle image velocimetry Computational flow dynamics Predation is fundamental to the biology of fish predators and prey. From the earliest stages of growth, prey fish survive attacks by fish predators with the ‘fast-start’ escape response ( Fuiman...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (15): 2659–2666.
Published: 1 August 2014
...: zebra finch ( Taeniopygia guttata, N =4) and diamond dove ( Geopelia cuneata, N =3). We measured kinematics using high-speed video, aerodynamics using particle image velocimetry, and ground-reaction forces using a perch mounted on a force plate. In contrast with the first three wingbeats of take-off...
Journal Articles
J Exp Biol (2014) 217 (3): 382–394.
Published: 1 February 2014
... its contribution to gliding at low Reynolds numbers. We used a straight physical model in a water tunnel to isolate the effects of 2D shape, analogously to studying the profile of an airfoil of a more typical flyer. Force measurements and time-resolved (TR) digital particle image velocimetry (DPIV...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (3): 331–336.
Published: 1 February 2014
...John O. Dabiri; Sanjeeb Bose; Brad J. Gemmell; Sean P. Colin; John H. Costello We describe and characterize a method for estimating the pressure field corresponding to velocity field measurements such as those obtained by using particle image velocimetry. The pressure gradient is estimated from...
Includes: Supplementary data