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National Repository of Grey Literature	2 records found	Search took 0.00 seconds.

Vliv tlaku nosného plynu na homogenní nukleaci n-alkoholů
Hyvärinen, A-P. ; Wedekind, J. ; Brus, David ; Lihavainen, H.
An overview on the gas pressure effect of nucleation rates of n-alcohols is made. The recent experimental results are compared to the theory introduced by Wedekind et all. The theory is able to predict both the negative and positive pressure effects observed in the experiments, as well as the magnitude of the effect. However, the ratio of carrier gas over vapor pressure has to be shifted by a factor of 0.3-3 for a best match between theory and experiment. This correction factor depends on temperature, vapor pressure of the nucleating vapor, and the carrier gas type.

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Vliv tlaku v jednofázové kondenzaci
Wedekind, J. ; Hyvärinen, A-P. ; Brus, David ; Reguera, D.
The pressure-efect of a chemically inert carrier-gas on the nucleation rate is one of the biggest puzzles in the research of gas-liquid nucleation. Different experiments may show a positive effect a negative effect, or no effect at all, at the same experiment can show both trends for the same substance depending on temperature or for different substances at the same temperature. We show how this ambiguous pressure effect naturally arises from the competition of nonisothermal effects and pressure volume work. We are able to apparently contradictory experimental results and quantify the variation of the nucleation ability in the presence of an ambient gas. Molecular dynamics simulations confirm these predictions very well.

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