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Conference papers
The Characteristic Scales of the Capillary Instability
Abstract : A multi-scale analysis of the capillary instability of Newtonian liquid ligament is presented. The DNS code ARCHER calculates the
temporal evolution of the ligament subject to a capillary instability for two initial wavenumbers. The analysis of the process is
performed with a multi-scale approach initially developed to investigate liquid atomisation processes from 2-D visualisation images.
In the present work, the axisymmetric condition allows performing a 3-D analysis also. The analysis reports three characteristic
scales that divide the scale space in three regions. In each region, specific scale dynamics is found illustrating the involvement of
different mechanisms. In particular, the characteristic small scale reports three regimes of decrease corresponding to the known
dynamics of the neck of a contracting ligament until breakup occurs. Furthermore, the existence of a pure elongation mechanism
during the process is identified. This mechanism limits the overall surface area reduction associated to the capillary instability. The
evolution of the elongation rate of this specific mechanism appears to be equal to the one of the small scale evolution rate
https://hal-normandie-univ.archives-ouvertes.fr/hal-01621300
Contributor : Christophe Dumouchel <>
Submitted on : Monday, September 6, 2021 - 10:43:51 AM
Last modification on : Wednesday, September 8, 2021 - 8:42:28 AM
Contributor : Christophe Dumouchel <>
Submitted on : Monday, September 6, 2021 - 10:43:51 AM
Last modification on : Wednesday, September 8, 2021 - 8:42:28 AM
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Dumouchel-ICMF2016-687.pdf
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