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Related Experiment Video

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Building Finite Element Models to Investigate Zebrafish Jaw Biomechanics

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Published on: December 3, 2016

Interfacial Dynamics in Dual Channels: Inspired by Cuttlebone.

Matthew Huang¹, Karl Frohlich¹, Ehsan Esmaili¹

¹Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA.

Biomimetics (Basel, Switzerland)

|October 27, 2023

Summary

Cuttlebone-inspired channels show that wavy structures create unstable liquid-gas interfaces, while straighter channels maintain stability. This research offers insights into fluid dynamics for buoyancy control in marine organisms.

Keywords:

Saffman-Taylor instability cuttlebone interfacial dynamics

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Area of Science:

Biomimetics
Fluid Dynamics
Bio-inspired Engineering

Background:

Cuttlebone, a gas-filled structure in cuttlefish, is vital for buoyancy control.
Its microstructure influences fluid dynamics during water pumping.
Understanding these dynamics can inspire artificial buoyancy systems.

Purpose of the Study:

To investigate liquid-gas interface motion in artificial channels mimicking cuttlebone.
To analyze the effect of channel geometry and pressure on interface behavior.
To correlate findings with cuttlefish buoyancy mechanisms.

Main Methods:

Fabrication of artificial channels with varying geometries (waviness, pillars).
Application of different pressure drops across the channels.
Observation and characterization of liquid-gas interface dynamics using Lyapunov exponents.

Main Results:

Wavy channels promoted non-uniform air-water interfaces.
Increased pressure drops led to more differential interface motion, indicated by higher Lyapunov exponents.
Greater channel waviness correlated with higher Lyapunov exponents.

Conclusions:

Channel waviness significantly impacts liquid-gas interface stability.
Findings suggest a link between channel geometry and efficient fluid transport in cuttlebone.
This study provides a basis for designing bio-inspired buoyancy control systems.