Quantitative estimates in the fluid dynamics of bristled wings of small insects

Tokyo Institute of Technology and Chiba University, Japan

Date(s) : 29/04/2020   iCal
14 h 00 min - 15 h 00 min

Some smallest insects have fringed wings with long bristles (setae) visually resembling bird feathers. They are active fliers, which implies that bristled wings produce enough force to support the animal body weight and propel it through the air. Aerodynamic function of the bristled wings is a curious topic for its biological context as well as for the peculiarities of the air flow conditions. In this regard, experiments and numerical simulations have been carried out to evaluate aerodynamic force generation capacity of the wings of a miniature featherwing beetle Paratuposa placentis. The aerodynamic force coefficients have been determined from a dynamically scaled force measurement experiment with rotating bristled and membrane wing models in a glycerin tank. They have been used as numerical validation data for a computational fluid dynamics simulation using an adaptive Navier-Stokes solver. The latter has provided point-wise information about the flow field, thus allowing to evaluate flow parameters such as leakiness and permeability, and gain an understanding of the underlying fluid-dynamic mechanisms.

Dr. Dmitry Kolomenskiy, Tokyo Institute of Technology and Chiba University, Japan


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