Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2009-05-14
Physics
Condensed Matter
Other Condensed Matter
9 pages, 6 figures, 1 table
Scientific paper
An investigation into the properties of a two dimensional (2D+1) system of self propelled particles (known as boids) in free space is conducted using a Lagrangian Individual-Based Model. A potential, associated with each boid is specified and a Lagrangian is subsequently derived in order to obtain the equations of motion for each particle in the flock. The Morse potential and the Lennard-Jones potential, both well understood in atomic and molecular physics, are specified. In contrast to the original model proposed by Vicsek [Phys. Rev. Lett. 75, 1226 (1995)] systems are considered with open boundary conditions. These two models successfully replicate the phases observed in Vicsek's original model, as well as several other significant phases, providing a realistic model of a wide range of flocking phenomena.
Martin Andrew M.
Smith Anthony J.
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