Nanoscale transport of energy and mass flux during evaporation of liquid droplets into inert gas: computer simulations and experiments

Hołyst, Robert; Litniewski, Marek; Jakubczyk, D.; Zientara, M.; Woźniak, M.

doi:10.1039/c3sm50997d

Cited by 25 publications

(48 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However unlike the condensation efficiency, the evaporation coefficient α may be greater than unity. This is supported by theoretical arguments and experiments [46], as well as recent Lennard-Jones numerical simulations of liquid droplet [47] and liquid slab evaporation [48]. Along with an equation of state, the Hertz-Knudsen equation provides the gas pressure, which appears also in the Rayleigh-Plesset equation (5).…”

Section: B Intermediate Growth Regime: the Rp-diffusion Systemmentioning

confidence: 57%

Bubble evolution and properties in homogeneous nucleation simulations

et al. 2014

View full text Add to dashboard Cite

We analyze the properties of naturally formed nanobubbles in Lennard-Jones molecular dynamics simulations of liquid-to-vapor nucleation in the boiling and the cavitation regimes. The large computational volumes provide a realistic environment at unchanging average temperature and liquid pressure, which allows us to accurately measure properties of bubbles from their inception as stable, critically sized bubbles, to their continued growth into the constant speed regime. Bubble gas densities are up to 50% lower than the equilibrium vapor densities at the liquid temperature, yet quite close to the gas equilibrium density at the lower gas temperatures measured in the simulations: The latent heat of transformation results in bubble gas temperatures up to 25% below those of the surrounding bulk liquid. In the case of rapid bubble growth-typical for the cavitation regime-compression of the liquid outside the bubble leads to local temperature increases of up to 5%, likely significant enough to alter the surface tension as well as the local viscosity. The liquid-vapor bubble interface is thinner than expected from planar coexistence simulations by up to 50%. Bubbles near the critical size are extremely nonspherical, yet they quickly become spherical as they grow. The Rayleigh-Plesset description of bubble-growth gives good agreement in the cavitation regime.

show abstract

Section: B Intermediate Growth Regime: the Rp-diffusion Systemmentioning

confidence: 57%

Bubble evolution and properties in homogeneous nucleation simulations

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Our analytical model of evaporation used in this work was discussed in details in. 39,41,[47][48][49] It assumes rapid liquid mixing, implicating also no temperature gradients (which turns out to be a good approximation even for relatively fast evaporation rates 50 ) and makes use of the Köhler equation. 51 The Köhler equation formally requires a uniform distribution of particles in liquid, but this kind of parameterization reproduces the observed droplet evolution well.…”

Section: Evolution Of Droplet Sizementioning

confidence: 99%

“…shows an example of the evolution of the droplet radius of silica suspension found in experiment together with the numerical results from our evaporation model41,47 for pure water and for water with solid inclusions (fraction of inclusions ∼ 0.1% in volume).The experimental evolution was obtained with a combination of the Mie Scattering Lookup…”

mentioning

confidence: 98%

Formation of Highly Ordered Spherical Aggregates from Drying Microdroplets of Colloidal Suspension

et al. 2015

View full text Add to dashboard Cite

The formation of highly ordered spherical aggregates of silica nanoparticles by the evaporation of single droplets of an aqueous colloidal suspension levitated (confined) in the electrodynamic quadrupole trap is reported. The transient and final structures formed during droplet evaporation have been deposited on a silicon substrate and then studied with SEM. Various successive stages of the evaporation-driven aggregation of nanoparticles have been identified: formation of the surface layer of nanoparticles, formation of the highly ordered spherical structure, collapse of the spherical surface layer leading to the formation of densely packed spherical aggregates, and rearrangement of the aggregate into the final structure of a stable 3D quasi-crystal. The evaporation-driven aggregation of submicrometer particles in spherical symmetry leads to sizes and morphologies of the transient and final structures significantly different than in the case of aggregation on a substrate. The numerical model presented in the article allows us to predict and visualize the observed aggregation stages and their dynamics and the final aggregates observed with SEM.

show abstract

“…For water, many studies have reported α M through measurements of evaporation/condensation kinetics (Davies et al, ; Hołyst et al, ; Langridge et al, ; Marek & Straub, ; Miles et al, ; Raatikainen et al, ; Tsuruta et al, ; Winkler et al, ). Results from experiments using a variety of ensemble and single‐particle techniques confirm that α M is greater than 0.2 (Langridge et al, ; Miles et al, ) and even close to 1 (Davies et al, ; Raatikainen et al, ; Winkler et al, ).…”

Section: Introductionmentioning

confidence: 99%

Evaporation Kinetics of Polyol Droplets: Determination of Evaporation Coefficients and Diffusion Constants

Marsh

Haddrell

et al. 2017

JGR Atmospheres

View full text Add to dashboard Cite

In order to quantify the kinetics of mass transfer between the gas and condensed phases in aerosol, physicochemical properties of the gas and condensed phases and kinetic parameters (mass/thermal accommodation coefficients) are crucial for estimating mass fluxes over a wide size range from the free molecule to continuum regimes. In this study, we report measurements of the evaporation kinetics of droplets of 1‐butanol, ethylene glycol (EG), diethylene glycol (DEG), and glycerol under well‐controlled conditions (gas flow rates and temperature) using the previously developed cylindrical electrode electrodynamic balance technique. Measurements are compared with a model that captures the heat and mass transfer occurring at the evaporating droplet surface. The aim of these measurements is to clarify the discrepancy in the reported values of mass accommodation coefficient (αM, equals to evaporation coefficient based on microscopic reversibility) for 1‐butanol, EG, and DEG and improve the accuracy of the value of the diffusion coefficient for glycerol in gaseous nitrogen. The uncertainties in the thermophysical and experimental parameters are carefully assessed, the literature values of the vapor pressures of these components are evaluated, and the plausible ranges of the evaporation coefficients for 1‐butanol, EG, and DEG as well as uncertainty in diffusion coefficient for glycerol are reported. Results show that αM should be greater than 0.4, 0.2, and 0.4 for EG, DEG, and 1‐butanol, respectively. The refined values are helpful for accurate prediction of the evaporation/condensation rates.

show abstract

Nanoscale transport of energy and mass flux during evaporation of liquid droplets into inert gas: computer simulations and experiments

Cited by 25 publications

References 34 publications

Bubble evolution and properties in homogeneous nucleation simulations

Bubble evolution and properties in homogeneous nucleation simulations

Formation of Highly Ordered Spherical Aggregates from Drying Microdroplets of Colloidal Suspension

Evaporation Kinetics of Polyol Droplets: Determination of Evaporation Coefficients and Diffusion Constants

Contact Info

Product

Resources

About