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Hydrodynamical models for the chaotic dripping faucet

Published online by Cambridge University Press:  25 February 2005

P. COULLET ,
L. MAHADEVAN  and
C. S. RIERA
P. COULLET
Affiliation:
INLN, 1361 route des Lucioles, 06560 Valbonne, France
L. MAHADEVAN
Affiliation:
DAMTP-CMS, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK Present address, DEAS, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.
C. S. RIERA
Affiliation:
DAMTP-CMS, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK Present address, DEAS, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.
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Abstract

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We give a hydrodynamical explanation for the chaotic behaviour of a dripping faucet using the results of the stability analysis of a static pendant drop and a proper orthogonal decomposition (POD) of the complete dynamics. We find that the only relevant modes are the two classical normal forms associated with a saddle–node–Andronov bifurcation and a Shilnikov homoclinic bifurcation. This allows us to construct a hierarchy of reduced-order models including maps and ordinary differential equations which are able to qualitatively explain prior experiments and numerical simulations of the governing partial differential equations and provide an explanation for the complexity in dripping. We also provide a new mechanical analogue for the dripping faucet and a simple rationale for the transition from dripping to jetting modes in the flow from a faucet.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 526 , 10 March 2005 , pp. 1 - 17
Copyright
© 2005 Cambridge University Press