The Experts below are selected from a list of 3246 Experts worldwide ranked by ideXlab platform
M. Bennai - One of the best experts on this subject based on the ideXlab platform.
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Charged 4D Einstein-Gauss-Bonnet-AdS black hole in Isobaric Process: Thermal conduction, compressibility and Bose Einstein distribution
'Elsevier BV', 2021Co-Authors: M. Bousder, M. BennaiAbstract:In this paper, we study Einstein-Gauss-Bonnet (EGB) black hole in 4D anti-de Sitter (AdS) spacetimes. We express all the thermodynamic parameters as a function of the GaussBonnet coupling α. The thermodynamics of black holes can be understood within the framework of the Isobaric Process, in this case, we show the heat flow and the thermal resistance for the thermal conduction. The physical aspects of this result is that α represents the thermal resistance of the black hole. As an application, we construct statistics of the EGB-AdS black hole undergo the Bose-Einstein statistics
D J Mccomas - One of the best experts on this subject based on the ideXlab platform.
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non equilibrium thermodynamic Processes space plasmas and the inner heliosheath
The Astrophysical Journal, 2012Co-Authors: G Livadiotis, D J MccomasAbstract:Recently, empirical kappa distribution, commonly used to describe non-equilibrium systems like space plasmas, has been connected with non-extensive statistical mechanics. Here we show how a consistent definition of the temperature and pressure is developed for stationary states out of thermal equilibrium, so that the familiar ideal gas state equation still holds. In addition to the classical triplet of temperature, pressure, and density, this generalization requires the kappa index as a fourth independent thermodynamic variable that characterizes the non-equilibrium stationary states. All four of these thermodynamic variables have key roles in describing the governing thermodynamical Processes and transitions in space plasmas. We introduce a novel characterization of isothermal and Isobaric Processes that describe a system's transition into different stationary states by varying the kappa index. In addition, we show how the variation of temperature or/and pressure can occur through an 'iso-q' Process, in which the system remains in a fixed stationary state (fixed kappa index). These Processes have been detected in the proton plasma in the inner heliosheath via specialized data analysis of energetic neutral atom (ENA) observations from Interstellar Boundary Explorer. In particular, we find that the temperature is highly correlated with (1) kappa, asymptotically related to isothermal ({approx}1,000,000 K)more » and iso-q ({kappa} {approx} 1.7) Processes; and (2) density, related to an Isobaric Process, which separates the 'Ribbon', P Almost-Equal-To 3.2 pdyn cm{sup -2}, from the globally distributed ENA flux, P Almost-Equal-To 2 pdyn cm{sup -2}.« less
Yu. I. Aristov - One of the best experts on this subject based on the ideXlab platform.
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kinetics of water adsorption desorption under Isobaric stages of adsorption heat transformers the effect of isobar shape
International Journal of Heat and Mass Transfer, 2009Co-Authors: I.s. Glaznev, D.s. Ovoshchnikov, Yu. I. AristovAbstract:Effect of the shape of equilibrium adsorption isobar on dynamics of water adsorption/desorption under Isobaric stages of a basic cycle of an adsorption heat transformer has been studied. Selective water sorbent SWS-1L (CaCl2 confined to mesoporous silica gel) was used for these tests as its water adsorption isobars have segments with both convex and concave shapes. From these experiments the conclusion has been drawn that the dynamics of adsorption on a single adsorbent grain is closely linked with the shape (convex or concave) of the segment of water adsorption isobar between initial and final temperatures of the Isobaric Process. In particular, under the same boundary conditions desorption is faster than adsorption for a concave isobar segment and vice versa for a convex one.
M. Bousder - One of the best experts on this subject based on the ideXlab platform.
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Charged 4D Einstein-Gauss-Bonnet-AdS black hole in Isobaric Process: Thermal conduction, compressibility and Bose Einstein distribution
'Elsevier BV', 2021Co-Authors: M. Bousder, M. BennaiAbstract:In this paper, we study Einstein-Gauss-Bonnet (EGB) black hole in 4D anti-de Sitter (AdS) spacetimes. We express all the thermodynamic parameters as a function of the GaussBonnet coupling α. The thermodynamics of black holes can be understood within the framework of the Isobaric Process, in this case, we show the heat flow and the thermal resistance for the thermal conduction. The physical aspects of this result is that α represents the thermal resistance of the black hole. As an application, we construct statistics of the EGB-AdS black hole undergo the Bose-Einstein statistics
Pablo G Debenedetti - One of the best experts on this subject based on the ideXlab platform.
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water anomalous thermodynamics attraction repulsion and hydrophobic hydration
Journal of Chemical Physics, 2016Co-Authors: Claudio A Cerdeirina, Pablo G DebenedettiAbstract:A model composed of van der Waals-like and hydrogen bonding contributions that simulates the low-temperature anomalous thermodynamics of pure water while exhibiting a second, liquid-liquid critical point [P. H. Poole et al., Phys. Rev. Lett. 73, 1632 (1994)] is extended to dilute solutions of nonionic species. Critical lines emanating from such second critical point are calculated. While one infers that the smallness of the water molecule may be a relevant factor for those critical lines to move towards experimentally accessible regions, attention is mainly focused on the picture our model draws for the hydration thermodynamics of purely hydrophobic and amphiphilic non-electrolyte solutes. We first focus on differentiating solvation at constant volume from the corresponding Isobaric Process. Both Processes provide the same viewpoint for the low solubility of hydrophobic solutes: it originates from the combination of weak solute-solvent attractive interactions and the specific excluded-volume effects associated with the small molecular size of water. However, a sharp distinction is found when exploring the temperature dependence of hydration phenomena since, in contrast to the situation for the constant-V Process, the properties of pure water play a crucial role at Isobaric conditions. Specifically, the solubility minimum as well as enthalpy and entropy convergence phenomena, exclusively ascribed to Isobaric solvation, are closely related to water’s density maximum. Furthermore, the behavior of the partial molecular volume and the partial molecular Isobaric heat capacity highlights the interplay between water anomalies, attraction, and repulsion. The overall picture presented here is supported by experimental observations, simulations, and previous theoretical results.
