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ZB 10 - Soft Condensed Matter (R. Holyst)

We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!

Publication

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

Author(s): Holyst, Robert and Litniewski, Marek and Jakubczyk, Daniel and Zientara, Marcin and Wozniak, Mariusz
Title: Nanoscale transport of energy and mass flux during evaporation of liquid droplets into inert gas: computer simulations and experiments
Abstract: We use molecular dynamics (MD) simulations of a two-component (LJ) fluid to analyze the energy flux from an inert gas to interface of an evaporating liquid droplet. Using this analysis we an analytical equation for the radius of the droplet, R(t), as a of time, t. The formula is valid for evaporation of droplets of material or size into the gas characterized by the mean free path, much larger than the molecular diameter, sigma. We find linear R(t) similar to t, for high lambda/ R(t) ratios and standard R-2(t) similar to t for small lambda/ R(t) ratios. We apply equation R(t) to experimental results of evaporation of water micro-droplets air and glycerol, diethylene glycol and triethylene glycol into the nitrogen gas evaporating in time from seconds to of minutes. The experimental results together with computer span 12 orders of magnitude of evaporation times and more 3 orders of magnitude of droplets' radii. In the experiments the rate is governed by a very small difference in temperatures one tenth of mK to a few K) between the gas far from the droplet evaporating liquid. From MD simulations we also obtain suitable conditions for the energy flux at the interface, used in thermodynamics, and the accommodation coefficients used in kinetic models of evaporation.
Pages: 7766-7774
Journal: SOFT MATTER
Volume: 9
ID: ISI:000322230300013
Year: 2013
DOI: 10.1039/c3sm50997d