Volume 85, Number 4, February 2009
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||19 February 2009|
Propulsion hydrodynamics of a butterfly micro-swimmer
Research Institute for Electronic Science, Hokkaido University - N20W10 Sapporo, 001-0020, Japan
2 Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society Faradayweg 46, 14195 Berlin, Germany, EU
Corresponding author: email@example.com
Accepted: 23 January 2009
Propulsion motion of a simple mechanical model at low Reynolds numbers is considered. The model consists of two spheroids (wings) connected by a hinge. Its non-reciprocal operation cycles represent combinations of flapping motions of the wings and of their rotations, resembling conformational motions characteristic for real protein machines and similar to the propulsion pattern of a butterfly. The net generated velocity and the net stall force, exhibited by an immobilized machine on its support, are calculated and their dependence on the model parameters is discussed.
PACS: 47.61.-k – Micro- and nano- scale flow phenomena / 47.15.G- – Low-Reynolds-number (creeping) flows / 87.15.H- – Dynamics of biomolecules
© EPLA, 2009
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