Coupled Simulation of Gasdynamic and Elastoplastic Phenomena in a Material under the Action of an Intensive Energy Flux

Boykov, D. S.; Olkhovskaya, O. G.; Gasilov, V. A.

doi:10.1134/s2070048222040044

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Numerical distributions of some important physical quantities in the studied process are illustrated at Figures 11-13. The recoil impulse of the flying vaporized material was directly taken into account in the end-to-end method in the process of calculating the stress-strain state in the non-vaporized remnant of the sample [15]. To verify the computation, theoretical estimates and experimental data obtained at the Kurchatov Institute Research Center on a high-current electronic accelerator "Kalmar" were used.…”

Section: Third Party Software and Open-source Toolsmentioning

confidence: 99%

“…Dynamic processes in the material of an object in a wide range of state parameters are modeled in the approximation of local thermodynamic equilibrium. When describing the state of a medium at a sufficiently high rate of change in its structure, a non-equilibrium at phase transitions or at changes in aggregate state of the material is allowed to be taken into account [15]. The equations of dynamics of a continuous medium are written in the form of basic conservation laws.…”

Section: Introductionmentioning

confidence: 99%

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MARPLE: software for multiphysics modelling in continuous media

Gasilov,

Boldarev,

Olkhovskaya

et al. 2023

NMP

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The research code MARPLE was originally created to model high-speed dynamic processes caused by the action of high-intensity energy fluxes on matter. At present, it is a universal tool able to solve various continuum mechanics problems. The implemented physical models are the following: single-fluid two-temperature MHD model of plasma dynamics, including electron-ion energy exchange and generalized Ohm’s law; model of electrical and thermal conductivity taking into account the anisotropy in the magnetic field; radiative heat transfer: models pertinent to optically thin as well as optically thick media: techniques for taking into account radiative cooling losses, spectral multigroup diffusion transfer, laser radiation propagation etc.; model of multicomponent flow. The MARPLE code utilises modern computational technologies based on block structured and unstructured meshes. MARPLE works as MPI application for modern HPC systems. The paper presents examples of problems in plasma dynamics, magnetohydrodynamics, astrophysics, and solid thermomechanics solved by means of the MARPLE code. Исследовательский код MARPLE изначально создавался для моделирования высокоскоростных динамических процессов, вызванных воздействием на вещество интенсивных потоков энергии. В настоящее время это универсальный инструмент, способный решать различные задачи механики сплошных сред. Реализованы следующие физические модели: одножидкостная двухтемпературная МГД-модель динамики плазмы, включающая электрон-ионный обмен энергией и обобщенный закон Ома; модель электро- и теплопроводности с учетом анизотропии в магнитном поле; радиационный теплообмен: модели, относящиеся как к оптически тонким, так и к оптически толстым средам: методы учета радиационных потерь на охлаждение, спектральный многогрупповой диффузионный перенос, распространение лазерного излучения и т. д.; модель многокомпонентного течения. В коде MARPLE используются современные вычислительные технологии, основанные на блочно-структурированных и неструктурированных сетках. MARPLE работает как приложение MPI для современных высокопроизводительных вычислительных систем. В работе приведены примеры задач динамики плазмы, магнитогидродинамики, астрофизики и термомеханики твердого тела, решенных с помощью кода MARPLE.

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Section: Third Party Software and Open-source Toolsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MARPLE: software for multiphysics modelling in continuous media

Gasilov,

Boldarev,

Olkhovskaya

et al. 2023

NMP

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“…Xiong et al [26] investigated elastic-plastic energy storage and dissipation of crystals under different strain rate impact by molecular dynamics simulations. Nonlinear elastic-plastic wave propagation in polymers due to the action of intense energy flows were studied by Boykov et al [27]. Finite difference method is used to solve Lagrangian description of conservation laws and hypo-elastic-plastic material relationship which is taken from the old literature.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Wave in Hypo-Elastic-Plastic Solids Modeled by Eulerian Conservation Laws

Yang¹,

Lowe²

2023

Preprint

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This paper reports a theoretical and numerical framework to model nonlinear waves in elastic-plastic solids. Formulated in the Eulerian frame, the governing equations employed include the continuity equation, the momentum equation, and an elastic-plastic constitutive relation. The complete governing equations are a set of first-order, fully coupled partial differential equations with source terms. The primary unknowns are velocities and deviatoric stresses. By casting the governing equations into a vector-matrix form, we derive the eigenvalues of the Jacobian matrix to show the wave speeds. The eigenvalues are also used to calculate the Courant number for numerical stability. The model equations are solved using the Space-Time Conservation Element and Solution Element (CESE) method. The approach is validated by comparing our numerical results to an analytical solution for the special case of longitudinal wave motion.

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