Predicting the Critical Supersaturation for Homogeneous Nucleation of Vapor Condensation

1968 ◽  
Vol 39 (7) ◽  
pp. 3287-3293 ◽  
Author(s):  
Farid F. Abraham
Keyword(s):  
Homogeneous Nucleation ◽  
Vapor Condensation ◽  
Critical Supersaturation

Molecular Dynamics Simulation of Vapor Condensation on Nanotubes

2013 ◽  
Author(s):  
Donguk Suh ◽  
Kenji Yasuoka ◽  
Xiao Cheng Zeng
Keyword(s):  
Molecular Dynamics ◽  
Growth Rate ◽  
Significant Variation ◽  
Homogeneous Nucleation ◽  
Vapor Condensation ◽  
Dynamics Simulation ◽  
Condensation Process ◽  
Silicon Nanotubes ◽  
Aspect Ratios ◽  
Different Types

Vapor condensation on silicon nanotubes has been simulated by classical molecular dynamics to understand how the nucleation and condensation process for pores is affected. Two different nanotube aspect ratios were examined to see if there are growth rate changes. The rate for the two different types of nanotubes did not show significant variation meaning that the aspect ratio is an insignificant factor to enhance condensation. This result is consistent with previous nanorod studies. The supersaturated vapor gathered both inside and outside of the tube. Unlike the growth rate, however, the occurrence of homogeneous nucleation was hindered contrary to other basic geometries in previous studies.

Condensation of supersaturated vapours. Homogeneous nucleation of naphthalene and phthalic anhydride

1985 ◽  
Vol 50 (6) ◽  
pp. 1349-1358 ◽  
Author(s):  
Jiří Smolík ◽  
Jaroslav Vítovec
Keyword(s):  
Surface Tension ◽  
Thermal Diffusion ◽  
Classical Theory ◽  
Phthalic Anhydride ◽  
Homogeneous Nucleation ◽  
Corresponding States ◽  
Experimental Results ◽  
Critical Supersaturation ◽  
Fluid Behaviour ◽  
Good Agreement

The critical supersaturation required for the homogeneous nucleation of naphthalene and phthalic anhydride from their vapours has been measured using upward thermal diffusion cloud chamber. The results obtained are compared with the predictions of the classical theory of homogeneous nucleation (Volmer-Becker-Doring-Zeldovich) and the corresponding states correlation of homogeneous nucleation. The classical theory is found to be in excellent agreement with the experimental results on naphthalene but overpredicts the critical supersaturation of phthalic anhydride vapours by about 30%. In order to fit the experiment and theory, the new values of surface tension of phthalic anhydride were recalculated from the theory. Critical supersaturation of naphthalene plotted versus temperature reveals the same regular departure from single fluid behaviour as found for alkylbenzenes. The experimental results on phthalic anhydride were found to be in very good agreement with the corresponding states correlation.

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