نتایج جستجو برای: local thermal equilibrium

تعداد نتایج: 853354  

Journal: :Physical review 2022

We investigate the dynamical spin polarization of a massless electron probing an plasma in locally thermal equilibrium via Moller scattering from quantum kinetic theory. derive axial equation delineating evolution presence collision term with corrections up to $\mathcal{O}(\ensuremath{\hbar})$ and leading-logarithmic order coupling by using hard-thermal-loop approximation, which we extract spin...

2004
Jens Kauffmann Frank Bertoldi

Following an approach initially outlined by McKee & Holliman [5], we investigate the structure and stability of dense, starless molecular cloud cores. We model those as spherical clouds in hydrostatic equilibrium and supported against gravity by thermal, turbulent, and magnetic pressure. We determine the gas pressure by solving for thermal equilibrium between heating and cooling, while the turb...

2012
E. V. Kustova

Modelling of heat transfer in non-equilibrium reacting gas flows is very important and promising for many up-to-date practical applications. Thus, calculation of heat fluxes is needed to solve the problem of heat protection for the surfaces of space vehicles entering into planet atmospheres. In high-temperature and hypersonic flows of gas mixtures, the energy exchange between translational and ...

2011
Kun Yang Kambiz Vafai

Thermal conditions at the porous-fluid interface under local thermal nonequilibrium (LTNE) conditions are analyzed in this work. Exact solutions are derived for both the fluid and solid temperature distributions for five of the most fundamental forms of thermal conditions at the interface between a porous medium and a fluid under LTNE conditions and the relationships between these solutions are...

2004
Sean Gavin

The centrality dependence of dynamic fluctuations of the transverse momentum and the net charge can signal the approach to local thermal equilibrium in nuclear collisions. I explore this signal by comparing transport-theory calculations to STAR and PHENIX data at a range of energies. In particular, I find that this model can describe PHENIX data on the dependence of fluctuations on the pt range...

1998
DANIEL PFENNIGER

We remind that the assumptions almost universally adopted among astronomers concerning the physics to use to describe rarefied cosmic gases remain often without justifications, mainly because the long range of gravitation invalidates the use of classical thermal physics. In turn, without sufficiently good local thermal equilibrium, macroscopic quantities, such as temperature and pressure, are n...

1993
Y. Leblanc

Canonical quantization of local field theories in classical black hole spacetimes with a single horizon leads to a particle number density with a thermal distribution in equilibrium at the Hawking temperature. A complete treatment including non-local quantum gravity effects has shown however that the full " thermal vacuum " of the theory is the false vacuum. In this work, we find the true vacuu...

2006
Michael Dreher Li Chen

We investigate the viscous model of quantum hydrodynamics in one and higher space dimensions. Exploiting the entropy dissipation method, we prove the exponential stability of the thermal equilibrium state in 1,2, and 3 dimensions, provided that the domain is a box. Further, we show the local in time existence of a solution in the one dimensional case; and in the case of higher dimensions under ...

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