Comparison of theoretical and experimental expansion cloud chamber nucleation rates of <i>n</i>-nonane

Kobraei, H. R.; Anderson, B. R.

doi:10.1063/1.461267

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…Farkas and Becker and Döring perfected the description, making it the most successful model for quantitative prediction of nucleation phenomena. Comprehensive treatments of nucleation are found in the books edited by Zettelmoyer. , Various theoretical developments have been reported in recent years. − A useful review was provided by Oxtoby describing some advanced treatments which try to avoid some of the idealizing assumptions of the classical theory. Here the treatment by Girshick and Chiu 40 and the latest calculations by Reiss et al are particularly successful modifications.…”

Section: Theorymentioning

confidence: 99%

Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect

2001

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In the past century, the homogeneous nucleation of light water (H2O) has repeatedly been studied using various experimental techniques. Generally, the onset of nucleation was recorded, while less frequently, the actual nucleation rates were determined. In contrast, the nucleation of heavy water (D2O) has been examined only in a single instance with no nucleation rates measured. Here, we report the first nucleation rate study of D2O along with nucleation rate measurements for H2O, which we repeated for comparison under identical conditions. We find that the nucleation rates for H2O and D2O differ by a factor of 2500, if compared at the same respective vapor pressure p v and temperature T, whereas the comparison at the same supersaturation S shows an agreement within experimental scatter. Also, the numbers of molecules in the critical clusters, which are determined from the slopes of the ln J versus ln S curves, are nearly the same for both isotopic waters. A satisfactory agreement with previous nucleation rate measurements of H2O made by Viisanen et al. (Viisanen, Y.; Strey, R.; Reiss, H. J. Chem. Phys. 1993, 99, 4680; 2000, 112, 8205) is observed, if the onset supersaturations S 0 at nucleation rates of J 0 = 107 cm-3 s-1 are compared. Using the most recent expressions for temperature-dependent vapor pressures, we calculated surface tensions and densities predictions by the classical Becker−Döring nucleation theory. Around T = 240 K, the predictions quantitatively agree with the experimental data. However, as in the case of other systems (e.g., alcohols and alkanes), classical theory shows a stronger temperature dependence than experimentally observed. A temperature-dependent correction of the classical theory is developed which permits analytical calculation of nucleation rates as function of supersaturation and temperature over extended ranges.

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Section: Theorymentioning

confidence: 99%

Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect

2001

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“…see references (32) and (33)]. ZAMP, 1963, 14, 280. However, two parallel studies using this approach 43 Denton, J. D. An improved time-marching method for (34)(35)(36) have not yielded substantially better results than turbomachinery flow calculations. ASME paper those based on the conventional approach.…”

Section: Wetness Lossesmentioning

confidence: 99%

On the performance of a cascade of turbine rotor tip section blading in nucleating steam Part 3: Theoretical treatment

Bakhtar

Mahpeykar²

1997

Proceedings of the Institution of Mechanical Engineers, Part C:

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During the course of expansion in turbines, steam first supercools and then nucleates to become a two-phase mixture. Formation and subsequent behaviour of the liquid lower the performance of turbine wet stages. This is an area where greater understanding can lead to improved design. This paper describes the theoretical part of an investigation into nucleating flows of steam in a cascade of turbine rotor tip section blading. The main flow field is regarded as inviscid and treated by the time-marching technique modified to allow for two-phase effects. The viscous effects are assumed to be concentrated in boundary layers which are treated by the integral method. Comparisons are carried out with the experimental measurements presented in the earlier parts of the paper and the agreement obtained is good.

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“…͑Note that we do not use any nucleation data in the fitting process, as some other semiempirical approaches do. 15 ͒ In Sec. III, we compare predicted and observed nucleation rates for several substances, and show that the two agree within the accuracy of the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Density functional theory of nucleation: A semiempirical approach

Nyquist

Talanquer

Oxtoby

1995

The Journal of Chemical Physics

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We present a semiempirical approach to the density functional theory of gas-liquid nucleation, in which the same experimental properties used in classical nucleation theory ͑equilibrium vapor pressure, liquid density, and surface tension͒ are used to fit three adjustable parameters in the intermolecular potential. This approach allows direct comparison of nucleation rates with experimental data. Agreement with results on nonane from three different experimental groups is reasonable, although the comparison clearly reveals the scatter in those results and suggests that further experimental measurements by different groups on the same systems would be very valuable. For water and the n-alcohols, this version of density functional theory gives results quite close to classical nucleation theory, implying that it is not a good approximation to describe polar fluids by effective spherically symmetric potentials.

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Comparison of theoretical and experimental expansion cloud chamber nucleation rates of n-nonane

Cited by 9 publications

References 23 publications

Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect

Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect

On the performance of a cascade of turbine rotor tip section blading in nucleating steam Part 3: Theoretical treatment

Density functional theory of nucleation: A semiempirical approach

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Comparison of theoretical and experimental expansion cloud chamber nucleation rates of n-nonane

Cited by 9 publications

References 23 publications

Homogeneous Nucleation of H2O and D2O in Comparison: The Isotope Effect

Homogeneous Nucleation of H2O and D2O in Comparison: The Isotope Effect

On the performance of a cascade of turbine rotor tip section blading in nucleating steam Part 3: Theoretical treatment

Density functional theory of nucleation: A semiempirical approach

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Product

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Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect

Homogeneous Nucleation of H₂O and D₂O in Comparison: The Isotope Effect