Article,

Non-uniform drag force on the Fermi accelerator model

, , and .
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 391 (22): 5366-5374 (2012)
DOI: 10.1016/j.physa.2012.06.044

Abstract

Some dynamical properties of a particle suffering the action of a generic drag force are obtained for a dissipative Fermi Acceleration model. The dissipation is introduced via a viscous drag force, like a gas, and is assumed to be proportional to a power of the velocity: F alpha -nu(gamma). The dynamics is described by a two-dimensional nonlinear area-contracting mapping obtained via the solution of Newton's second law of motion. We prove analytically that the decay of high energy is given by a continued fraction which recovers the following expressions: (i) linear for gamma = 1; (ii) exponential for gamma = 2; and (iii) second-degree polynomial type for gamma = 1.5. Our results are discussed for both the complete version and the simplified version. The procedure used in the present paper can be extended to many different kinds of system, including a class of billiards problems. (C) 2012 Elsevier B.V. All rights reserved.

Tags

Users

  • @ppgfis_ufc_br

Comments and Reviews