Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.184501
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Funding
- Nottingham Trent University
- Arts and Humanities Research Council [AH/H032665/1] Funding Source: researchfish
- AHRC [AH/H032665/1] Funding Source: UKRI
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In the evaporation of microlitre liquid droplets, the accepted view is that surface tension dominates and the effect of gravity is negligible. We report, through the first use of rotating optical coherence tomography, that a change in the flow pattern and speed occurs when evaporating binary liquid droplets are tilted, conclusively showing that gravitational effects dominate the flow. We use gas chromatography to show that these flows are solutal in nature, and we establish a flow phase diagram demonstrating the conditions under which different flow mechanisms occur.
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