The viscomagnetic effect in N2, CO2, CO, CH4 and CF4

Influence of a magnetic field on the viscosity of a dilute gas consisting of linear molecules

“…There is thus sufficient evidence to indicate that the data of Korving 35 at high B/P values suffer from a systematic bias.…”

“…3, we compare with the data of Burgmans et al 40 and Korving 35 for the difference between two longitudinal coefficients, −(∆η B/P at two different temperatures. We have also included the data calculated from the coefficients −∆η + 1 /η and −∆η + 2 /η given by Hulsman et al 38 to show the consistency of the experimental data at 293 K. As in the case of the coefficient −(∆η Fig.…”

“…The measurements were performed at room temperature at B/P values of up to 0.0035 T/Pa (4.7 kOe/Torr). Korving followed this work with more extensive measurements 35 of two different longitudinal coefficients, −(∆η 36 This was followed by work of Hulsman and coworkers, 37,38 who measured both transverse viscomagnetic coefficients, η − 1 /η and η − 2 /η, at room temperature using an experimental setup with an adjustable magnet orientation, which allowed for the determination of both coefficients with lower uncertainty. Subsequently, Hulsman et al 37,39 reported a further set of measurements to evaluate the longitudinal coefficients at room temperature in the B/P range up to 0.007 T/Pa (9.5 kOe/Torr).…”

“…The apparatus was used to perform measurements of the longitudinal coefficient −∆η while above that the calculated values underestimate the measured ones. 35 In order to compare the two sets of experimental data, we have used the −(∆η At high values of B/P, these data are up to 40% higher than the data measured by van Ditzhuyzen and co-workers. Disagreement between the data of Korving 35 and other workers at high B/P values has already been noted when discussing the measurements for nitrogen and methane.…”

“…Korving and co-workers 34,35 reported measurements of −(∆η 24 using a capillary viscometer with a superconducting magnet capable of generating very high fields strengths, which was arranged either perpendicular to the flow or at an angle of 45…”