Optimal vortex formation as a unifying principle in biological propulsion

JO Dabiri - Annual review of fluid mechanics, 2009 - annualreviews.org
I review the concept of optimal vortex formation and examine its relevance to propulsion in
biological and bio-inspired systems, ranging from the human heart to underwater vehicles …

Cool your jets: biological jet propulsion in marine invertebrates

BJ Gemmell, JO Dabiri, SP Colin… - Journal of …, 2021 - journals.biologists.com
Pulsatile jet propulsion is a common swimming mode used by a diverse array of aquatic taxa
from chordates to cnidarians. This mode of locomotion has interested both biologists and …

Optimal vortex formation as an index of cardiac health

M Gharib, E Rambod, A Kheradvar… - Proceedings of the …, 2006 - National Acad Sciences
Heart disease remains a leading cause of death worldwide. Previous research has indicated
that the dynamics of the cardiac left ventricle (LV) during diastolic filling may play a critical …

Lagrangian analysis of fluid transport in empirical vortex ring flows

SC Shadden, JO Dabiri, JE Marsden - Physics of fluids, 2006 - pubs.aip.org
In this paper we apply dynamical systems analyses and computational tools to fluid transport
in empirically measured vortex ring flows. Measurements of quasisteadily propagating …

Flow patterns generated by oblate medusan jellyfish: field measurements and laboratory analyses

JO Dabiri, SP Colin, JH Costello… - Journal of Experimental …, 2005 - journals.biologists.com
Flow patterns generated by medusan swimmers such as jellyfish are known to differ
according the morphology of the various animal species. Oblate medusae have been …

The wake structure and thrust performance of a rigid low-aspect-ratio pitching panel

JHJ Buchholz, AJ Smits - Journal of fluid mechanics, 2008 - cambridge.org
Thrust performance and wake structure were investigated for a rigid rectangular panel
pitching about its leading edge in a free stream. For ReC= O (104), thrust coefficient was …

Vorticity dynamics of a bileaflet mechanical heart valve in an axisymmetric aorta

LP Dasi, L Ge, HA Simon, F Sotiropoulos… - Physics of …, 2007 - pubs.aip.org
We present comprehensive particle image velocimetry measurements and direct numerical
simulation (DNS) of physiological, pulsatile flow through a clinical quality bileaflet …

Fast-swimming hydromedusae exploit velar kinematics to form an optimal vortex wake

JO Dabiri, SP Colin, JH Costello - Journal of Experimental …, 2006 - journals.biologists.com
Fast-swimming hydromedusan jellyfish possess a characteristic funnel-shaped velum at the
exit of their oral cavity that interacts with the pulsed jets of water ejected during swimming …

Swimming dynamics and propulsive efficiency of squids throughout ontogeny

IK Bartol, PS Krueger, JT Thompson… - Integrative and …, 2008 - academic.oup.com
Squids encounter vastly different flow regimes throughout ontogeny as they undergo critical
morphological changes to their two locomotive systems: the fins and jet. Squid hatchlings …

Parameters influencing vortex growth and detachment on unsteady aerodynamic profiles

A Widmann, C Tropea - Journal of Fluid Mechanics, 2015 - cambridge.org
Experiments with a pitching and plunging airfoil are conducted in order to investigate the
mechanisms responsible for the formation and detachment of leading edge vortices (LEVs) …