Streamlines of flow inside an flexible-walled left ventricle physical model incorporated into a pulsatile flow circuit.

Intraventricular flow in a flexible-walled physical model of obstructive hypertrophic cardiomyopathy, at a heart rate of 110 bpm. Flow visualized using particle image velocimetry (PIV). Contours indicate vorticity (rotation strength) of the flow, and arrows correspond to the 2D velocity vector field.

Interaction of upside-down jellyfish currents with background flow (moving left to right). Dye introduced near the sandy substrate is pulled toward the medusa by pulsations of the bell. The branched oral arms of the jellyfish break the coherent starting vortex formed during bell contractions, and mix the dye with the incoming background flow moving left to right.

Intraventricular flow at increased heart rate (110 bpm) visualized using particle image velocimetry (PIV) data acquired on flexible-walled left ventricle physical model. Contours indicate vorticity (rotation strength) of the flow, and arrows correspond to the 2D velocity vector field.

Top view of the 'clap and fling' wing-wing interaction simulated using a robotic model for studies of tiny insect flight at low Reynolds numbers.

High-resolution video of bell pulsations of upside-down jellyfish. Swirling motion of particles mixed in water is seen near bell margin.

Physical models of bristled wings in 'clap and fling' interaction for studies of tiny insect flight at low Reynolds numbers.

High-speed video (600 frames per second) of a ghost shrimp (1.5 inches body length) showing deformation of individual swimming limbs and the non-synchronous stroke pattern. A tail-to-head metachronal wave is generated in the same direction as the animal motion (right to left).

Hovering of a freshwater ghost shrimp individual (1.5 inches body length), filmed at 600 frames per second.