Results 11 to 20 of about 628,195 (294)

Heterogeneity in homogeneous nucleation from billion-atom molecular dynamics simulation of solidification of pure metal [PDF]

Nature Communications, 2017
Nucleation is a fundamental physical process, however it is a long-standing issue whether completely homogeneous nucleation can occur. Here the authors reveal, via a billion-atom molecular dynamics simulation, that local heterogeneity exists during ...
Yasushi Shibuta, Shinji Sakane, Eisuke Miyoshi, Shin Okita, Tomohiro Takaki, Munekazu Ohno   +5 more
doaj   +2 more sources

Dynamics of homogeneous nucleation [PDF]

The Journal of Chemical Physics, 2015
The classical nucleation theory for homogeneous nucleation is formulated as a theory for a density fluctuation in a supersaturated gas at a given temperature. But molecular dynamics simulations reveal that it is small cold clusters which initiates the nucleation.
Toxværd, Søren, Søren Toxvaerd
openaire   +5 more sources

Homogeneous Nucleation in Water in Microfluidic Channels [PDF]

Physical Review Letters, 2012
It has been an experimental challenge to test the rupture of liquids with homogeneous nucleation of vapor bubbles. Many prior studies suffered from the ubiquitous presence of impurities in liquids or at container surfaces that spontaneously nucleate and grow under tension. Here, we propose a microfluidic approach to eliminate such impurities and obtain
Ando, Keita, Liu, Ai Qun, Ohl, Claus-Dieter   +2 more
openaire   +4 more sources

Nonisothermal homogeneous nucleation [PDF]

The Journal of Chemical Physics, 1992
Classical homogeneous nucleation theory is extended to nonisothermal conditions through simultaneous cluster mass and energy balances. The transient nucleation of water vapor following a sudden increase in saturation ratio is studied by numerically solving the coupled mass and energy balance equations.
Wyslouzil, B. E., Seinfeld, J. H.
openaire   +4 more sources

Ice nucleation under cirrus cloud conditions [PDF]

, 2012
Cirrus are thin upper tropospheric clouds that are composed entirely of ice particles. Due to their extensive coverage of the Earth’s surface, they have a significant impact on the Earth’s radiative balance.
Wilson, Theodore W
core   +6 more sources

Sensitivity studies of dust ice nuclei effect on cirrus clouds with the Community Atmosphere Model CAM5 [PDF]

Atmospheric Chemistry and Physics, 2012
In this study the effect of dust aerosol on upper tropospheric cirrus clouds through heterogeneous ice nucleation is investigated in the Community Atmospheric Model version 5 (CAM5) with two ice nucleation parameterizations.
X. Liu, X. Shi, K. Zhang, E. J. Jensen, A. Gettelman, D. Barahona, A. Nenes, P. Lawson   +7 more
doaj   +1 more source

Homogeneous nucleation of NAD and NAT in liquid stratospheric aerosols: insufficient to explain denitrification [PDF]

, 2002
Knopf DA, Koop T, Luo BP, Weers UG, Peter T. Homogeneous nucleation of NAD and NAT in liquid stratospheric aerosols: insufficient to explain denitrification. ATMOSPHERIC CHEMISTRY AND PHYSICS. 2002;2(3):207-214.The nucleation of NAD and NAT from HNO3/H2O
U. G. Weers, Luo, B. P., B. P. Luo, T. Peter, Weers, U. G., Koop, T., Koop, Thomas ; https://orcid.org/, Peter, T., T. Koop, Knopf, D. A., D. A. Knopf   +10 more
core   +2 more sources

Heterogeneous Crystal Nucleation from the Melt in Polyethylene Oxide Droplets on Graphite: Kinetics and Microscopic Structure

Crystals, 2021
It is well known that the crystallization of liquids often initiates at interfaces to foreign solid surfaces. In this study, using polarized light optical microscopy, atomic force microscopy (AFM), and wide-angle X-ray scattering (WAXS), we investigate ...
Muhammad Tariq, Thomas Thurn-Albrecht, Oleksandr Dolynchuk   +2 more
doaj   +1 more source

Homogeneous nucleation of silicon

Journal of Aerosol Science, 1994
Abstract The homogeneous nucleation of silicon from the SiHCl system was studied theoretically for a wide range of compositions and temperatures. Contour plots of the conversion ratio and the chemical potential to nucleate are displayed. Nucleation rates were calculated using a modified classical nucleation model (Girshick et al. (1990) Aerosol Sci.
Kruis, F.E. (author), Schoonman, J. (author), Scarlett, B. (author)   +2 more
openaire   +3 more sources

Ice nucleation from aqueous NaCl droplets with and without marine diatoms [PDF]

Atmospheric Chemistry and Physics, 2011
Ice formation in the atmosphere by homogeneous and heterogeneous nucleation is one of the least understood processes in cloud microphysics and climate. Here we describe our investigation of the marine environment as a potential source of atmospheric IN ...
P. A. Alpert, J. Y. Aller, D. A. Knopf
doaj   +1 more source