Unsteady Flow and Force Control in Butterfly Take-off Flight

TL;DR

This study combines high-speed videography, 3D modeling, and advanced simulations to analyze the unsteady aerodynamics and force control mechanisms during a butterfly's take-off flight.

Contribution

It introduces a comprehensive methodology integrating photogrammetry, 3D reconstruction, and high-fidelity simulations to study butterfly flight dynamics.

Findings

Detailed vortex formation patterns identified

Insights into aerodynamic force generation during take-off

Enhanced understanding of wing deformation effects

Abstract

In this work, high-resolution, high-speed videos of a Monarch butterfly (Danaus plexippus) in take-off flight were obtained using a photogrammetry system. Using a 3D subdivision surface reconstruction methodology, the butterfly's body/wing deformation and kinematics were modeled and reconstructed from those videos. High fidelity simulations were then carried out in order to understand vortex formation in both near-field and far-field of butterfly wings and examine the associated aerodynamic performance. A Cartesian grid based sharp interface immersed boundary solver was used to handle such flows in all their complexity.