On the stabilizing effect of a liquid film on a cylindrical core by oscillatory motions

W. Rohlfs, M. Binz, R. Kneer

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Liquid films on cylindrical bodies like wires or fibres disintegrate if their length exceeds a critical size (Plateau-Rayleigh instability). Stabilization can be achieved by an axial oscillation of the solid core provided that a suitable combination of forcing amplitude and frequency is given. To investigate the stabilizing effect, direct numerical simulations (DNS) of the axisymmetric problem are conducted with a height function based solver. It is found that the mechanism of film stabilization is caused by the interaction between an inertia dominated region (high film thickness) and a viscosity dominated region (low film thickness). Replenishing of the thin film region is thereby supported while depleting is suppressed, finally leading to a stable film flow on an oscillating cylinder. To the end, a systematic variation of the main system parameters, e.g., the Weber number, the ratio between the radius of the inner core and the average film coating thickn
Original languageEnglish
Article number022101
JournalPhysics of fluids
Volume26
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint Dive into the research topics of 'On the stabilizing effect of a liquid film on a cylindrical core by oscillatory motions'. Together they form a unique fingerprint.

Cite this