Title: Influence of a magnetic field on the viscosity of a dilute gas consisting of linear molecules
Authors: Hellmann, Robert 
Vesovic, Velisa
Language: eng
Issue Date: 7-Dec-2015
Document Type: Article
Journal / Series / Working Paper (HSU): The journal of chemical physics : JCP
Volume: 143
Issue: 21
The viscomagnetic effect for two linear molecules, N2 and CO2, has been calculated in the dilute-gas limit directly from the most accurate ab initio intermolecular potential energy surfaces presently available. The calculations were performed by means of the classical trajectory method in the temperature range from 70 K to 3000 K for N2 and 100 K to 2000 K for CO2, and agreement with the available experimental data is exceptionally good. Above room temperature, where no experimental data are available, the calculations provide the first quantitative information on the magnitude and the behavior of the viscomagnetic effect for these gases. In the presence of a magnetic field, the viscosities of nitrogen and carbon dioxide decrease by at most 0.3% and 0.7%, respectively. The results demonstrate that the viscomagnetic effect is dominated by the contribution of the jj¯ polarization at all temperatures, which shows that the alignment of the rotational axes of the molecules in the presence of a magnetic field is primarily responsible for the viscomagnetic effect.
Organization Units (connected with the publication): Universität Rostock
ISSN: 00219606
Publisher DOI: 10.1063/1.4936417
Appears in Collections:6 - Bibliographic Data - Publications of the HSU Researchers (before HSU)

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