Coffee rings and ridges: predicting late-time deposit profiles in drying droplets

High-order asymptotic methods provide accurate, analytic solutions to intractable potential problems (2024)
Journal Article
Wray, A., & Moore, M. (2024). High-order asymptotic methods provide accurate, analytic solutions to intractable potential problems. Scientific reports, 14(1), Article 4225. https://doi.org/10.1038/s41598-024-54377-2

The classical problem of determining the density and capacity of arrays of potential sources is studied. This corresponds to a wide variety of physical problems such as electrostatic capacitance, stress in elastostatics and the evaporation of fluid d... Read More about High-order asymptotic methods provide accurate, analytic solutions to intractable potential problems.

Gravitational effects on coffee-ring formation during the evaporation of sessile droplets (2023)
Journal Article
Moore, M., & Wray, A. (2023). Gravitational effects on coffee-ring formation during the evaporation of sessile droplets. Journal of Fluid Mechanics, 967, Article A26. https://doi.org/10.1017/jfm.2023.493

We consider the role of gravity in solute transport when a thin droplet evaporates. Under the physically relevant assumptions that the contact line is pinned and the solutal Péclet number, Pe , is large, we identify two asymptotic regimes that depen... Read More about Gravitational effects on coffee-ring formation during the evaporation of sessile droplets.