Biotechnology

A more accurate numerical model of butterfly flight dynamics

Credit: CC0 Public Domain

The flight of a butterfly is a complex phenomenon in which the flow of air formed by the swing of the wings and the movement of the butterflies themselves are intricately intertwined. Many elements of butterfly aerodynamics still need to be understood, even in terms of basic motion.

A team led by Professor Kasuke Suzuki of Xinxhu University School of Engineering measured the actual movement butterflies with high-speed video and place it in a motion capture program that identifies distinctive points on their wings and body.

The numerical model of the butterfly on the basis of these data was conceived as accurately as possible. Coincidentally, the model reproduced what was suggested by simulation using a simple model that the lab had formulated earlier. Butterfly modelwhich is more accurate than previous research, confirmed what has been suggested in the past.

Now that the group has figured out the lion’s share of how butterflies generate power, the group would like to figure out the mechanism by which a butterfly controls torque without losing its attitude. Ultimately, this mechanism can be applied in the design of micro-air vehicles (MAVs).

A high-speed camera (HAS-U2, DITECT) was used to capture the butterfly’s takeoff, and based on video, the trajectory of six characteristic points captured on the butterfly’s wings and body is recorded by software to track moving objects (DIPP-MotionV / 3D, DITECT ). Credit: Kosuke Suzuki, Masashi Nakamura, Masaya Kodi, Masato Yoshina
Comparison of the movements of a digital butterfly model and an actual butterfly. The model coincides with the real movement, which indicates the design of a satisfactory model. Credit: Kosuke Suzuki, Masashi Nakamura, Masaya Kodi, Masato Yoshina
The flow around a butterfly numerical model is calculated by the Boltzmann method with submerged boundaries, and the flow field is visualized using an index called vorticity. The swing of the model causes the flow down and back. Credit: Kosuke Suzuki, Masashi Nakamura, Masaya Kodi, Masato Yoshina

The journal published “Review of the flight dynamics of the butterfly take-off: experiments and CFD modeling for the white-headed butterfly” Biology Open.


Butterflies create a jet motion by flapping their wings


Additional information:
Kosuke Suzuki et al., Review of flight dynamics during butterfly takeoff: experiments and CFD modeling for white-headed butterfly, Biology Open (2022). DOI: 10.1242 / bio.059136

Provided by Shinshu University

Citation: A more accurate numerical model of butterfly flight dynamics (2022, February 15), obtained February 15, 2022 from https://phys.org/news/2022-02-precise-numerical-butterfly-flight-dynamics.html

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https://phys.org/news/2022-02-precise-numerical-butterfly-flight-dynamics.html A more accurate numerical model of butterfly flight dynamics

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