Abstract

The thermomagnetic torque in rarefied gases is caused by a bulk effect and contributions due to the boundary layer. The purpose of this paper is to determine the relative importance of these two groups of contributions. Therefore, data on the thermomagnetic torque has been extrapolated to the near hydrodynamic region in order to compare with the bulk contribution calculated from the second order Chapman-Enskog approximation. For N2 between 75 and 300°K the bulk effect is shown to be always the most important mechanism. The contributions from the boundary layer, however, become relatively more important for lower temperatures.

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