On the path and efficiency of two micromachines with rigid tails
 S. Nasseri,
 N. PhanThien
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This paper reports on the results of investigation of the swimming of two different micromachines. Mechanically each of these micromachines consists of a head (containing an electromechanical power source) and a tail which moves relative to the head as a rigid body. The problem is approached theoretically by considering the types of movement which can occur for these micromachines immersed in a viscous medium. The first micromachine has a tail which oscillates in vertical plane, therefore the trajectory of this machine is in that plane too. The tail of the second micromachine roates conically, so it produces a three dimensional helical path in space with its axis approximately along the direction of tail centreline.
Using the boundary element method for solving the traction equations on the surface of the tail, and a timedependent Euler kinematic scheme to plot the path, the net propulsive force and torque, the translational velocity, angular velocity and the trajectory of each machine are calculated. Evaluation of the path and the direction of motion for each micromachine using different dimensional parameters can give an idea of the efficiency for such machines with rigid tails.
 Title
 On the path and efficiency of two micromachines with rigid tails
 Journal

Computational Mechanics
Volume 18, Issue 3 , pp 192199
 Cover Date
 199607
 DOI
 10.1007/BF00369937
 Print ISSN
 01787675
 Online ISSN
 14320924
 Publisher
 SpringerVerlag
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 Authors

 S. Nasseri ^{(1)}
 N. PhanThien ^{(1)}
 Author Affiliations

 1. Department of Mechanical and Mechatronic Engineering, The University of Sydney, 2006, N.S.W., Australia