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Staggered Lagrangian Discretization Based on Cell-Centered Riemann Solver and Associated Hydrodynamics Scheme

Communications in Computational Physics 2011年第9期10卷 940-978页

作者： Pierre-Henri Maire Raphael Loubere pavel vachal CEA-CESTA BP 233114Le BarpFrance Institut de Mathematiques de Toulouse(IMT)Universite Paul-Sabatier and CNRS ToulouseFrance FNSPE Czech Technical University(CTU)in PragueCzech Republic

The aim of the present work is to develop a general formalism to derive staggered discretizations for Lagrangian hydrodynamics on two-dimensional unstructured *** this end,we make use of the compatible discretization that has been initially introduced by *** et al.,in ***.,146(1998).Namely,momentum equation is discretized by means of subcell forces and specific internal energy equation is obtained using total energy *** main contribution of this work lies in the fact that the subcell force is derived invoking Galilean invariance and thermodynamic *** is,we deduce a general form of the sub-cell force so that a cell entropy inequality is *** subcell force writes as a pressure contribution plus a tensorial viscous contribution which is proportional to the difference between the nodal velocity and the cell-centered *** cell-centered velocity is a supplementary degree of freedom that is solved by means of a cell-centered approximate Riemann *** satisfy the second law of thermodynamics,the local subcell tensor involved in the viscous part of the subcell force must be symmetric positive *** subcell tensor is the cornerstone of the *** particular expression of this tensor is given.A high-order extension of this discretization is *** tests are presented in order to assess the efficiency of this *** results obtained for various representative configurations of one and two-dimensional compressible fluid flows show the robustness and the accuracy of this scheme.

关键词： Lagrangian scheme Riemann solver artificial viscosity hydrodynamics compressible flow

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Innovative education and training in high power laser plasmas(PowerLaPs) for plasma physics, high power laser matter interactions and high energy density physics: experimental diagnostics and simulations

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High Power Laser Science and Engineering 2020年第1期8卷 30-36页

作者： John Pasley Georgia Andrianaki Andreas Baroutsos Dimitri Batani Emmanouil PBenis Andrea Ciardi Donna Cook Vasilios Dimitriou Brendan Dromey Ioannis Fitilis Giancarlo Gatti Anastasios Grigoriadis Marine Huault Jose Antonio Pérez Hernández Evaggelos Kaselouris Ondrej Klimo Michel Koenig George Koundourakis Milan Kucharik Jiri Limpouch Richard Liska Carlos Salgado Lopez Sophia Malko Susana Olmos-Miguelanez Yannis Orphanos Valeria Ospina Nektarios APapadogiannis Stelios Petrakis Jan Psikal Maria Serena Rivetta Maria-ose Rodriguez-Conde Joao Jorge Santos Milan Sinor Alexandros Skoulakis Ioannis Tazes Laura Tejada Pascual Calliope Tsitou pavel vachal Luca Volpe Jiri Vyskocil Steven White Mark Yeung Ghassan Zerouli Michael Tatarakis York Plasma Institute University of YorkHeslingtonYork YO105DQUK Hellenic Mediterranean University Institute of Plasma Physics and Lasers-IPPL74100 Rethymnon73133 ChaniaCreteGreece University of Bordeaux CNRSCEACELIA(Centre Lasers Intenses et Applications)UMR 5107F-33405 TalenceFrance Department of Physics University of IoanninaGR 45110 IoanninaGreece LULI-CNRS CEASorbonne UniversiesEcole PolytechniqueInstitut Polytechnique de Paris-F-91128 Palaiseau CedexFrance Observatoire de Paris 5 Place J JanssenMeudon 92195France Centre for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastBelfast BT71NNUK Centro de Láseres Pulsados(CLPU) Edificio M5Parque CientficoC/Adaja 837185 VillamayorSalamancaSpain University of Salamanca 37008 SalamancaSpain Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in PragueBrehova 711519Prague 1Czech Republic University Institute for Educational Sciences University of Salamanca37008 SalamancaSpain Group of Research“Interaction and e Learning”(GRIAL) University of Salamanca37008 SalamancaSpain CLPU Laser-Plasma Chair at University of Salamanca 37008 SalamancaSpain

The second and final year of the Erasmus Plus programme’Innovative Education and Training in high power laser plasmas’,otherwise known as PowerLaPs,is *** PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme,where teaching takes place in five separate institutes with a range of different aims and styles of ***’in-class’time is limited to 4 weeks a year,and the programme spans 2 *** aims to train students from across Europe in theoretical,applied and laboratory skills relevant to the pursuit of research in laser plasma interaction physics and inertial confinement *** are intermingled with laboratory sessions and continuous assessment *** programme,which is led by workers from the Hellenic Mediterranean University and supported by co-workers from the Queen’s University Belfast,the University of Bordeaux,the Czech Technical University in Prague,Ecole Polytechnique,the University of Ioannina,the University of Salamanca and the University of York,has just finished its second and final *** Learning Teaching Training activities have been held at the Queen’s University Belfast,the University of Bordeaux,the Czech Technical University,the University of Salamanca and the Institute of Plasma Physics and Lasers of the Hellenic Mediterranean *** last of these institutes hosted two 2-week-long Intensive Programmes,while the activities at the other four universities were each 5 days in *** addition,a’Multiplier Event’was held at the University of Ioannina,which will be briefly *** this second year,the work has concentrated on training in both experimental diagnostics and simulation techniques appropriate to the study of plasma physics,high power laser matter interactions and high energy density *** nature of the programme will be described in detail,and some metrics relating to the activities carried out will be *** particular,this paper will f

关键词： laser plasma interactions postgraduate education

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