University of Cambridge > > Faculty of Mathematics Lectures > Coating Liquid Films down a Vertical Fibre

Coating Liquid Films down a Vertical Fibre

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  • UserZing Ding, Harbin, Institute of Technology, China
  • ClockFriday 07 May 2021, 16:00-17:00
  • HouseVenue to be confirmed.

If you have a question about this talk, please contact virginia mullins.

Part of the GKB 100 Fluid Mechanics Webinar Series, registration required, and now closed

Previous experimental study by Kliakhandler et al. (JFM 429:381-390, 2001) reported three different flow patterns of a liquid film flowing down a vertical cylinder. The film flow is unstable due to the famous Plateau-Rayleigh mechanism, which evolves into organised droplets flow patterns. When the flow rate is high, steady moving droplets separated by a long-thin film were observed. When the flow rate is reduced, necklace-like flow structure was seen. When the flow rate is very small, droplets of multi-scales were observed and complex dynamical interactions between these droplets cause an unsteady flow. However, no previous theoretical model correctly predicted the droplet dynamics in the three regimes. In this talk, I will discuss the reasons accounting for poor predictions of liquid film dynamics down a vertical fibre. Then, we solve the Navier-Stokes problem and our results show excellent agreements with the experimental data by Kliakhandler et al.

This talk is part of the Faculty of Mathematics Lectures series.

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