Tag: Motion (physics)
Reciprocal flapping produces motion in viscoelastic granular hydrogels
What the study found A scallop-like swimmer with reciprocally flapping wings could move through a nearly frictionless, cohesive granular medium made of hydrogel spheres when its flapping frequency matched the material's inverse relaxation time. The swimmer moved in the opposite direction from how it moved in a cohesion-free granular material of hard plastic spheres. Why…
Chemical step drives droplet migration and spreading
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in EngineeringWhat the study found The study found that droplets on a chemical step, a sharp border between two regions with different wettability, move in two successive stages: migration across both regions and then asymmetric spreading on the hydrophilic region. For both 2-D and 3-D droplets, the border can pin the rear contact line during the…
