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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Convexity, Uniqueness, and Stability of the Regular Shock Reflection-diffraction Problem
规则冲击 反射衍射问题 凸性 唯一性 稳定性
2023/4/17
We will talk about our recent results on the convexity, uniqueness, and stability of regular reflection solutions for the potential flow equation in a natural class of self-similar solutions. The appr...
Hydrogen and deuterium in shock wave experiments, ab initio simulations and chemical picture modeling
Hydrogen and deuterium ab initio simulations chemical picture modeling Plasma Physics
2012/5/17
We present equation of state data of shock compressed hydrogen and deuterium. These have been calculated in the physical picture by using {\it ab initio} molecular dynamics simulations based on finite...
A Comparison of Cosmological Codes: Properties of Thermal Gas and Shock Waves in Large Scale Structures
galaxy: clusters, general – methods: numerical – intergalactic medium – largescale structure of Universe
2011/9/13
Cosmological hydrodynamical simulations are a valuable tool for understanding the growth of large scale structure and the observables connected with this. Yet, comparably little attention has been giv...
Determining the wavelength of Langmuir wave packets at the Earth's bow shock
wavelength Langmuir wave packets Earth's bow shock
2011/8/5
Abstract: The propagation of Langmuir waves in plasmas is known to be sensitive to density fluctuations. Such fluctuations may lead to the coexistence of wave pairs that have almost opposite wave-numb...
The Role of Collective Neutrino Flavor Oscillations in Core-Collapse Supernova Shock Revival
Core-Collapse Supernova Shock Revival Neutrino
2011/7/21
We explore the effects of collective neutrino flavor oscillations due to neutrino-neutrino interactions on the neutrino heating behind a stalled core-collapse supernova shock. We carry out axisymmetri...
Thermodynamic phase transitions and shock singularities
thermodynamic phase transitions shock singularities Mathematical Physics
2011/9/29
Abstract: We show that under rather general assumptions on the form of the entropy function, the energy balance equation for a system in thermodynamic equilibrium is equivalent to a set of nonlinear e...
Rarefaction Shock Waves in Collisionless Plasma with Electronic Beam
Collisionless plasma, Supersonic ion-acoustic rarefaction shock waves
2011/9/9
We show that an electronic beam passing through the collisionless plasma of the ”cold” ions and the ”hot” Boltzmann electrons can give rise to the propagation of the supersonic ion-acoustic rarefactio...
Robustness of the filamentation instability as shock mediator in arbitrarily oriented magnetic field
Robustness of the filamentation arbitrarily oriented magnetic field
2011/9/14
The filamentation instability (sometimes also referred to as “Weibel”) is a key process in many astrophysical scenario. In the Fireball model for Gamma Ray Bursts, this instability is believed to medi...
An invariant in shock clustering and Burgers turbulence
Shock clustering, stochastic coalescence, kinetic theory, Burgers turbulence, integrable systems, Loitsiansky invariant
2011/9/14
1-D scalar conservation laws with convex flux and Markov initial data are now known to yield a completely integrable Hamiltonian system. In this article, we rederive the analogue of Loitsiansky’s inva...
An invariant in shock clustering and Burgers turbulence
Shock clustering stochastic coalescence kinetic theory integrable systems Loitsiansky invariant
2011/7/28
Abstract: 1-D scalar conservation laws with convex flux and Markov initial data are now known to yield a completely integrable Hamiltonian system. In this article, we rederive the analogue of Loitsian...
Shock Wave Collisions and Thermalization in AdS_5
Shock Wave Collisions Thermalization AdS_5
2010/12/22
We study heavy ion collisions at strong 't Hooft coupling using AdS/CFT correspondence. According to the AdS/CFT dictionary heavy ion collisions correspond to gravitational shock wave collisions in A...
Holography and colliding gravitational shock waves in asymptotically AdS_5 spacetime
Holography colliding gravitational shock waves
2010/12/23
Using holography, we study the collision of planar shock waves in strongly coupled N=4 supersymmetric Yang-Mills theory. This requires the numerical solution of a dual gravitational initial value prob...
Time-dependent Radiation Transfer in the Internal Shock Model Scenario for Blazar Jets
Time-dependent Radiation the Internal Shock Model
2010/12/27
We describe the time-dependent radiation transfer in blazar jets, within the internal shock model. We assume that the central engine, which consists of a black hole and an accretion disk, spews out re...
On the critical condition in gravitational shock wave collision and heavy ion collisions
critical condition gravitational shock wave collision heavy ion collisions
2010/12/23
The paper derived a critical condition for matter equilibration in heavy ion collisions using a holographic approach. A gravitational shock waves with infinite transverse extension is used to model in...
Holography and colliding gravitational shock waves in asymptotically AdS_5 spacetime
Holography colliding gravitational shock waves asymptotically AdS_5 spacetime
2010/12/21
The recognition that the quark-gluon plasma (QGP) produced in relativistic heavy ion col-
lisions is strongly coupled [1], combined with the ad-vent of gauge/gravity duality (or \holography") [2, 3],...