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On the existence of periodic and eventually periodic solutions of a fluid dynamic forced harmonic oscillator

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  • Charlie H. Cooke

Abstract

For certain flow regimes, the nonlinear differential equation Y ¨ = F ( Y ) − G , Y ≥ 0 , G > 0 and constant, models qualitatively the behaviour of a forced, fluid dynamic, harmonic oscillator which has been a popular department store attraction. The device consists of a ball oscillating suspended in the vertical jet from a household fan. From the postulated form of the model, we determine sets of attraction and exploit symmetry properties of the system to show that all solutions are either initially periodic, with the ball never striking the fan, or else eventually approach a periodic limit cycle, after a sufficient number of bounces away from the fan.

Suggested Citation

  • Charlie H. Cooke, 1986. "On the existence of periodic and eventually periodic solutions of a fluid dynamic forced harmonic oscillator," International Journal of Mathematics and Mathematical Sciences, Hindawi, vol. 9, pages 1-5, January.
    • Handle: RePEc:hin:jijmms:549289
    DOI: 10.1155/S0161171286000479
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