Microdroplet evaporation on superheated surfaces

Transient and local two-phase heat transport at macro-scales to nano-scales

“…6 suggests that CHF is reached at T HS ≈ 200 ± 30°C for subcooled confined boiling, whereas CHF is reached at T HS ≈ 220 ± 10°C-i.e., a comparable wall temperature-for subcooled flow boiling in the microchannel (Supplementary Note 5). These hot-spot wall temperatures match well with that expected based on the Leidenfrost effect with water 47,48 . It is also noted that the subcooled flow boiling data reveals a negative slope at the onset of nucleate subcooled boiling.…”

Steady-state droplet evaporation: Contact angle influence on the evaporation efficiency

“…12 and 14 in Ref. [7], where systematic changes in surface properties showed no significant impact on the overall evaporation rate when normalized by the droplet's contact radius. Yet, changes in surface structure have shown to be highly beneficial during evaporation of highly wetting droplets.…”

“…A fundamental process like droplet evaporation which is widely observed in day to day life holds a pivotal role in many technical applications, including DNA/RNA micro-array deposition [1,2], inkjet printing [3,4], microelectronics cooling [5][6][7], combustion [8,9] and metrology [10][11][12]. In such technologies, the evaporation rate is a key contributor to the overall system efficiency -as it dictates the droplet lifetime and corresponding rates of heat and mass transfer.…”

“…In such technologies, the evaporation rate is a key contributor to the overall system efficiency -as it dictates the droplet lifetime and corresponding rates of heat and mass transfer. With this said, a droplet's evaporation rate ( _ m LG ) is commonly correlated with several interdependent factors/parameters, including contact line dynamics/motion [7,[13][14][15][16]; substrate surface structure [17], energy [18], and thermal conductivity [19]; vapor/gas concentration and convection [20,21]; and the thermofluid properties of the evaporating fluid itself [22]. Thus, from an overarching perspective, droplet evaporation can be considered a relatively complex phenomena.…”

Modeling of the non-isothermal liquid droplet impact on a heated solid substrate with heterogeneous wettability

“…A considerable number of numerical simulations of droplet impinging on heated solid substrates with homogeneous wettability have been reported in the literature [9][10][11][12][13][14][15][16][17]. The above list of references may not be complete, but to the best of the authors knowledge, simulation of droplet impinging on heated solid substrates with heterogeneous wettability has not been reported in the previous studies.…”