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The equation of state (EOS) of alloys at high pressures is generalized with the cluster expansion method. It is shown that this provides a more accurate description. The low temperature EOSs of Ni-Al alloys on FCC and BCC lattices are…

材料科学 · 物理学 2012-03-06 H. Y. Geng , N. X. Chen , M. H. F. Sluiter

When a plane shock hits a two-dimensional wedge head on, it experiences a reflection-diffraction process, and then a self-similar reflected shock moves outward as the original shock moves forward in time. The experimental, computational,…

偏微分方程分析 · 数学 2019-10-08 Gui-Qiang G. Chen , Mikhail Feldman , Wei Xiang

An influential result of F. John states that no genuinely non-linear strictly hyperbolic quasi-linear first order system of partial differential equations in two variables has a global $C^2$-solution for small enough initial data. Inspired…

偏微分方程分析 · 数学 2016-08-24 Demetrios Christodoulou , Daniel Raoul Perez

The Equation of State (EoS) of dense matter represents a central issue in the study of compact astrophysical objects and heavy ion reactions at intermediate and relativistic energies. We have derived a nuclear EoS with nucleons and hyperons…

核理论 · 物理学 2008-11-26 Fiorella Burgio

We investigate the mechanism of whistler-mode wave generation by shock-reflected electrons at quasi-perpendicular collisionless shocks. By employing Liouville mapping to construct the electron velocity distribution function in the shock and…

等离子体物理 · 物理学 2026-03-20 Ruolin Wang , Takanobu Amano

We are concerned with the Prandtl-Meyer reflection configurations of unsteady global solutions for supersonic flow impinging upon a symmetric solid wedge. Prandtl (1936) first employed the shock polar analysis to show that there are two…

偏微分方程分析 · 数学 2024-02-06 Myoungjean Bae , Gui-Qiang G. Chen , Mikhail Feldman

We study phase-transition-like behavior in neutron stars using a simplified, piecewise equation of state that couples a modified van der Waals-type core to a polytropic crust. The model remains analytically tractable while allowing for…

高能天体物理现象 · 物理学 2026-02-26 P. H. F. Arruda , S. D. Campos

Core-collapse simulations of massive stars are performed using the equation of state (EOS) based on the microscopic variational calculation with realistic nuclear forces. The progenitor models with the initial masses of $15M_\odot$,…

高能天体物理现象 · 物理学 2021-06-30 Ken'ichiro Nakazato , Kohsuke Sumiyoshi , Hajime Togashi

The present paper deals with the following hyperbolic--elliptic coupled system, modelling dynamics of a gas in presence of radiation, $u_{t}+ f(u)_{x} +Lq_{x}=0, -q_{xx} + Rq +G\cdot u_{x}=0,$ where $u\in\R^{n}$, $q\in\R$ and $R>0$, $G$,…

偏微分方程分析 · 数学 2019-07-25 Corrado Lattanzio , Corrado Mascia , Denis Serre

Interpreting the cosmological constant \Lambda as a thermodynamic pressure and its conjugate quantity as a thermodynamic volume, we study the Maxwell's equal area law of higher dimensional Gauss-Bonnet-AdS black holes in extended phase…

高能物理 - 理论 · 物理学 2015-06-23 A. Belhaj , M. Chabab , H. El Moumni , K. Masmar , M. B. Sedra

In a previous paper we studied the thermodynamic and kinetic theory for an ionized gas, in one space dimension; in this paper we provide an application of those results to the reflection of a shock wave in an electromagnetic shock tube.…

偏微分方程分析 · 数学 2018-01-17 Fumioki Asakura , Andrea Corli

In an accretion of fluid, its velocity may transit from subsonic to supersonic. The point at which such transition occurs is called sonic point and often mathematically special. We consider a steady-state and spherically symmetric accretion…

广义相对论与量子宇宙学 · 物理学 2016-09-07 Yasutaka Koga , Tomohiro Harada

We show that an interacting electronic system with a single ordinary or extended Van Hove point, which crosses the Fermi energy, is unstable against triplet superconductivity. The pairing mechanism is unconventional. There is no Cooper…

超导电性 · 物理学 2025-02-10 Risto Ojajärvi , Andrey V. Chubukov , Yueh-Chen Lee , Markus Garst , Jörg Schmalian

We present a mathematical model for the propagation of the shock waves that occur during planetary collisions. Such collisions are thought to occur during the formation of terrestrial planets, and they have the potential to erode the…

地球与行星天体物理 · 物理学 2019-11-19 Almog Yalinewich , Andrey Remorov

The condition of linear instability for a converging cylindrical strong shock wave (SW) in an arbitrary viscous medium is obtained in the limit of a large stationary SW radius, when it is possible to consider the same Rankine-Hugoniot jump…

流体动力学 · 物理学 2020-11-03 Sergey G. Chefranov

Gaussian processes provide a promising framework by which to extrapolate the equation of state (EoS) of cold, catalyzed matter beyond $1-2$ times nuclear saturation density. Here we discuss how to extend Gaussian processes to include…

高能天体物理现象 · 物理学 2023-02-17 Debora Mroczek , M. Coleman Miller , Jacquelyn Noronha-Hostler , Nicolas Yunes

The ultra-relativistic Euler equations for an ideal gas are described in terms of the pressure, the spatial part of the dimensionless four-velocity and the particle density. Radially symmetric solutions of these equations are studied in two…

数学物理 · 物理学 2024-02-21 Matthias Kunik , Adrian Kolb , Siegfried Müller , Ferdinand Thein

This paper develops the basic sets of equations which lead to the conservation laws describing collisionless plasma shock waves. We discuss the evolution of shock waves by wave steepening, derive the Rankine-Hugoniot conditions for…

天体物理学 · 物理学 2008-05-16 R. A. Treumann , C. H. Jaroschek

Van der Waals heterostructures formed by stacking two-dimensional atomic crystals are a unique platform for exploring new phenomena and functionalities. Interlayer excitons, bound states of spatially separated electron-hole pairs in van der…

材料科学 · 物理学 2018-02-14 Zefang Wang , Yi-Hsin Chiu , Kevin Honz , Kin Fai Mak , Jie Shan

Evidence for the existence of van der Waals loops in pressure p versus volume v plots has for some time supported the belief that melting in two dimensions is a first order phase transition. We report rather accurate equilibrium p(v) curves…

统计力学 · 物理学 2009-10-31 J. J. Alonso , J. F. Fernandez