Viscosity of nitrogen measured to pressures of 7 GPa and temperatures of 573 K.
Shear viscosities of supercritical nitrogen have been measured to 573 K and 7 GPa (70 kbars). Measurements were made in a diamond-anvil cell with a rolling-ball technique. Individual isotherms are well fitted by a modified Doolittle equation. The data demonstrate a close relation between viscosities and excess entropy; this relation is further explored for the systems argon, oxygen, carbon dioxide, sodium, cesium, and a Lennard-Jones fluid.
Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA. evan@ess.washington.edu
Evan H
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Abramson
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West-Foyle