Complete thermodynamically consistent kinetic model of particle nucleation and growth: Numerical study of the applicability of the classical theory of homogeneous nucleation

2007 ◽  
Vol 126 (14) ◽  
pp. 144504 ◽  
Author(s):  
Evgeni N. Chesnokov ◽  
Lev N. Krasnoperov
Keyword(s):  
Kinetic Model ◽  
Classical Theory ◽  
Homogeneous Nucleation ◽  
Numerical Study ◽  
Nucleation And Growth ◽  
Particle Nucleation

Mathematical Modelling of NbC Particle Nucleation and Growth in an HSLA Steel under Elastic Deformation

2011 ◽  
Vol 172-174 ◽  
pp. 893-898 ◽  
Author(s):  
Dennis Ouden ◽  
Fred J. Vermolen ◽  
Lie Zhao ◽  
Cees Vuik ◽  
Jilt Sietsma
Keyword(s):  
Elastic Deformation ◽  
Homogeneous Nucleation ◽  
Strain Energy ◽  
Particle Number ◽  
Hsla Steel ◽  
High Strength ◽  
Nucleation And Growth ◽  
Particle Number Density ◽  
Particle Nucleation ◽  
Cylindrical Region

This study attempts to incorporate the effect of elastic deformation in a previously proposedmodel for the nucleation and growth of precipitates. We adapt the KWN-model by Robson to incor-porate the effect of strain energy arising from elastic deformation on the homogeneous nucleation andgrowth of NbC particles in a High Strength Low Alloy (HSLA) steel at constant temperature. Simula-tions of the nucleation and growth of NbC particles in an HSLA steel on the cylindrical region showthat the incorporation of elastic strain energies has a noticeable impact on the process. The derivedquantities of homogeneous nucleation and growth, such as the particle number density and the meanparticle radius, show a clear spatial correlation with the calculated strain energy.

An experimental and numerical study of particle nucleation and growth during low-pressure thermal decomposition of silane

2003 ◽  
Vol 34 (6) ◽  
pp. 691-711 ◽  
Author(s):  
Sandeep Nijhawan ◽  
Peter H McMurry ◽  
Mark T Swihart ◽  
Song-Moon Suh ◽  
Steven L Girshick ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Numerical Study ◽  
Low Pressure ◽  
Nucleation And Growth ◽  
Particle Nucleation

scholarly journals Particle formation and growth at five rural and urban sites

2010 ◽  
Vol 10 (5) ◽  
pp. 11615-11657 ◽  
Author(s):  
C.-H. Jeong ◽  
G. J. Evans ◽  
M. L. McGuire ◽  
R. Y.-W. Chang ◽  
J. P. D. Abbatt ◽  
...  
Keyword(s):  
Ultrafine Particle ◽  
Particle Formation ◽  
Nucleation And Growth ◽  
Biogenic Emissions ◽  
Traffic Density ◽  
Particle Nucleation ◽  
Size Distributions ◽  
Industrial Sources ◽  
Rural Sites ◽  
Particle Formation And Growth

Abstract. Ultrafine particle (UFP) number and size distributions were simultaneously measured at five urban and rural sites in Southern Ontario, Canada as part of the Border Air Quality and Meteorology Study (BAQS-Met 2007). Particle formation and growth events at these five sites were classified based on their strength and persistence as well as the variation in geometric mean diameter. Regional nucleation and growth events and local short-lived strong nucleation events were frequently observed at the near-border rural sites, upwind of industrial sources. Surprisingly, the particle number concentrations at one of these sites were higher than the concentrations at a downtown site in a major city, despite its high traffic density. Regional nucleation and growth events were favored at intense solar irradiance and less polluted cooler drier air. The most distinctive regional particle nucleation and growth event during the campaign was observed simultaneously at all five sites, which were up to 350 km apart. Although the ultrafine particle concentrations and size distributions generally were spatially heterogeneous across the region, a more uniform spatial distribution of UFP across the five areas was observed during this regional nucleation event. Thus, nucleation events can cover large regions, contributing to the burden of UFP in cities and potentially to the associated health impacts on urban populations. In addition, particle formation in southwestern Ontario appears to more often be related to anthropogenic gaseous emissions, although biogenic emissions may at times contribute. Local short-lived nucleation events at the near-border sites during this three-week campaign were associated with high SO2, which likely originated from US and Canadian industrial sources. These particle formation events may contribute to the production of cloud condensation nuclei, thus potentially influencing regional climate. Longer-term studies are needed to help resolve the relative contributions of anthropogenic and biogenic emissions to nucleation and growth in this region.

Particle Nucleation and Growth

2015 ◽  
pp. 5315-5329
Author(s):  
Clifford Yi-Der Tai ◽  
Pao-Chi Chen ◽  
Wen-Chen Chien
Keyword(s):  
Nucleation And Growth ◽  
Particle Nucleation
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