Edinburgh Research Explorer

Order-of-magnitude increase in flow velocity driven by mass conservation during the evaporation of sessile drops

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Open Access permissions

Open

Documents

  • Download as Adobe PDF

    Rights statement: Publisher's Version/PDF: author can archive publisher's version/PDF General Conditions: Link to publisher version required Publisher copyright must be acknowledged Publisher's version/PDF can be used on author's or employers web site, or institutional repository

    Final published version, 583 KB, PDF document

http://pre.aps.org/abstract/PRE/v83/i5/e051602
Original languageEnglish
Article number051602
Number of pages5
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Volume83
Issue number5
DOIs
Publication statusPublished - 11 Mar 2011

Abstract

We report on a dramatic order-of-magnitude increase in flow velocity within pinned evaporating droplets toward the end of their lifetime. The measurements were performed using high-speed microparticle image velocimetry. The study revealed interesting observations about the spatial and temporal evolution of the velocity field. The profile along the radius of the droplet is found to exhibit a maximum toward the three phase contact line with flow oscillations in time in this region. Additional optical measurements allowed further analysis of the observed trends. Analysis of the potential mechanisms responsible for the flow within the droplet demonstrated that these observations can be satisfactorily explained and accounted for by mass conservation within the droplet to compensate for evaporation.

Download statistics

No data available

ID: 1269221