Influence of a magnetic field on the viscosity of a dilute gas consisting of linear molecules
Publication date
2015-12-07
Document type
Research article
Author
Vesovic, Velisa
Organisational unit
Universität Rostock
Scopus ID
Pubmed ID
Series or journal
The journal of chemical physics : JCP
Periodical volume
143
Periodical issue
21
Peer-reviewed
✅
Part of the university bibliography
Nein
Abstract
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.
Version
Not applicable (or unknown)
Access right on openHSU
Metadata only access