Geophysical Flows in Spherical Geometry from Electric Fields and Near-Critical Fluids

Details Geophysical Flows in Spherical Geometry from Electric Fields and Near-Critical Fluids Geophysical Flows in Spherical Geometry from Electric Fields and Near-Critical Fluids

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mfpt....2..520h&link_type=abstract

Sixth Microgravity Fluid Physics and Transport Phenomena Conference: Exposition Topical Areas 1-6, vol. 2, p. 520-530

Physics

Electric Fields, Geophysical Fluids, Dielectrics, Compressible Fluids, Concentric Spheres, Coriolis Effect, Interfacial Tension, Liquid Phases, Permittivity, Electrodes, Capacitors, Vapor Phases, Supercritical Fluids

Scientific paper

The use of near-critical fluids allows important parameters (e.g., compressibility of supercritical fluids, density of gas and liquid phases, surface tension) to be easily varied by using small changes in temperature. These highly variable properties of near-critical fluids makes it possible to study interesting phenomena when external forces are applied to the fluid. In particular, I plan to study geophysical flows in a spherical capacitor. The spherical capacitor will exert a central polar (di-electrophoretic) force on a supercritical fluid. This creates a central body force on the hyper-compressible fluid with a resultant radial density gradient. Large-scale geophysical flows, analogous to a planetary liquid core, a planetary ocean or atmosphere, etc., could be studied when a Coriolis force is also applied in a rotating frame of reference. In this presentation, I will show experimental results in support of this goal.

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