منابع مشابه
Phase separation in hydrogen-helium mixtures at Mbar pressures.
The properties of hydrogen-helium mixtures at Mbar pressures and intermediate temperatures (4000 to 10000 K) are calculated with first-principles molecular dynamics simulations. We determine the equation of state as a function of density, temperature, and composition and, using thermodynamic integration, we estimate the Gibbs free energy of mixing, thereby determining the temperature, at a give...
متن کاملThermodynamics and phase separation of dense fully ionized hydrogen-helium fluid mixtures
The free energy of a hydrogen-helium fluid mixture is evaluated for the temperatures and densities appropriate to the deep interior of a giant planet such as Jupiter. The electrons are assumed to be fully pressure ionized and degenerate. In this regime, an appropriate first approximation to the ionic distribution functions can be found by assuming hard-sphere interactions. Corrections to this a...
متن کاملEffects of Helium Phase Separation on the Evolution of Extrasolar Giant Planets
We build on recent new evolutionary models of Jupiter and Saturn and here extend our calculations to investigate the evolution of extrasolar giant planets of mass 0.15 to 3.0 MJ. Our inhomogeneous thermal history models show that the possible phase separation of helium from liquid metallic hydrogen in the deep interiors of these planets can lead to luminosities ∼ 2 times greater than have been ...
متن کاملUnderstanding Amplitude and Phase in Rotating Machinery
The measurement of phase is essential in the balancing of singleor multi-plane balancing of rotating machinery. The rate of change of phase is important, as it may indicate the presence of a critical speed, and from the rate of change of phase one may be able to deduce the amplification factor or log decrement of a particular mode. Having a phase reference mark is particularly critical on compl...
متن کاملTurbulence Limits in Rotating Plasmas for Isotope Separation
Z. Naturforsch. 37a, 294-304 (1982); received October 1, 1981 With the aim of using rotating plasmas (driven b y j x B o r E x B forces) for isotope separation, several experimental configurations have been studied and theory has been developed with respect to numerical models, the Alfven ionization limit, D'Angelo's shear instability, while turbulence was suggested qualitatively only. A more d...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1969
ISSN: 0033-068X
DOI: 10.1143/ptp.41.1395