Rintaro Hayashi

Papers

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About

Rintaro Hayashi is a biophysicist and experimental fluid dynamicist whose research lies at the intersection of low-Reynolds-number locomotion, biological fluid mechanics, and soft matter physics. His most cited work, “Metachronal Swimming with Rigid Arms near Boundaries” (2020, 25 citations), explores how microscopic organisms and crustaceans use coordinated appendage motion—metachronal waves—to swim near solid surfaces where viscous forces dominate. By building minimal experimental models, Hayashi revealed the essential physical principles that enable efficient swimming without inertia, shedding light on the fundamental constraints faced by tiny aquatic organisms. His contributions are particularly significant for understanding how boundaries alter propulsion strategies in viscous environments, with implications for bio-inspired microrobotics and medical devices. Hayashi’s work bridges the gap between theoretical hydrodynamics and tangible laboratory demonstrations, making complex fluid phenomena accessible to students and researchers alike. With a growing citation record and a knack for elegant experimental design, he is establishing himself as a rising voice in the physics of life at small scales.