Numerical Simulation of Boltzmann Flows of Real Gases — Accuracy of Models Used in the Monte Carlo Method —

1991 ◽  
pp. 120-138 ◽  
Author(s):  
K. Nanbu
Keyword(s):  
Numerical Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
The Monte Carlo Method

scholarly journals Neutronic modeling of a subcritical system with corium particles and water (from international benchmark)

2020 ◽  
Vol 6 (3) ◽  
pp. 155-160
Author(s):  
Anton D. Smirnov ◽  
Ekaterina V. Bogdanova ◽  
Pavel A. Pugachev ◽  
Ivan S. Saldikov ◽  
Mikhail Yu. Ternovykh ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Scientific Community ◽  
Structural Elements ◽  
The Monte Carlo Method ◽  
Fukushima Daiichi ◽  
Simulation Results ◽  
Subcritical System ◽  
Good Agreement

After the accident at the Fukushima Daiichi NPP, the attention of the scientific community is riveted on how the consequences are being eliminated. Removing corium – a lava-like resolidified mixture of nuclear fuel with other structural elements of the reactor – remains the most difficult task, the solution of which can take several decades. It is extremely important to exclude the occurrence of any emergency processes during the removal of corium. The purpose of this work was to solve a coordinated hydrodynamic and neutronic problem characterized by a large number of randomly oriented and irregularly located corium particles in water as part of the development of a benchmark for this class of problems. Monte Carlo-based precision codes were used to perform a neutronic analysis. The positions of corium particles were determined from the numerical simulation results. The analysis results obtained using the codes involved showed good agreement for all the states considered. It was shown that the modern neutronic codes based on the Monte Carlo method successfully cope with the geometric formation and solution of the problem with a nontrivial distribution of corium particles in water. The results of the study can be used to justify the safety of corium handling procedures, including its extraction from a damaged power unit.

scholarly journals Анализ структуры многослойных нанокристаллических покрытий на основе параметров массопереноса плазмы, вычисленных методом Монте-Карло

2019 ◽  
Vol 45 (3) ◽  
pp. 16 ◽  
Author(s):  
А.В. Черногор ◽  
И.В. Блинков ◽  
Д.С. Белов ◽  
В.С. Сергевнин ◽  
А.О. Волхонский
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Concentration Distribution ◽  
Chemical Elements ◽  
Vacuum Arc ◽  
The Monte Carlo Method ◽  
Simulation Results

AbstractThe results of the simulation of plasma fluxes onto the surface of rotating substrates during the combustion of a vacuum arc of the Cr–Ti–Mo cathode system are presented. The structure and composition of the arc-PVD Ti_0.15Cr_0.74Mo_0.11N_0.84 coatings are experimentally studied. The numerical simulation results of the coating structures based on experimental data were analyzed. The possibility of the simulation of the structure of multilayer, multicomponent coatings and the concentration distribution of chemical elements and its components is shown by calculating the plasma fluxes using the Monte Carlo method.

scholarly journals Оптические и кинетические характеристики импульсного разряда в гелии с парами железа при атмосферном давлении

2019 ◽  
Vol 89 (3) ◽  
pp. 384
Author(s):  
В.С. Курбанисмаилов ◽  
С.А. Майоров ◽  
О.А. Омаров ◽  
Г.Б. Рагимханов
Keyword(s):  
Numerical Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Emission Spectrum ◽  
Electrode Material ◽  
Atmospheric Pressure ◽  
Spectral Lines ◽  
Pulsed Discharge ◽  
Cathode Plasma ◽  
The Monte Carlo Method

AbstractThe emission spectrum of a near-cathode plasma of a pulsed discharge in atmospheric pressure helium reveals spectral lines of electrode material. Numerical simulation of the kinetics by the Monte Carlo method shows that starting with a fraction of percent, the addition of iron atoms to helium strongly affect the ionization-drift characteristics of electrons in gas.

scholarly journals Stochastic Modeling of Compartmental Systems with Pipes

2019 ◽  
Vol 14 (1) ◽  
pp. 188-203 ◽  
Author(s):  
K.K. Loginov ◽  
N.V. Pertsev ◽  
V.A. Topchii
Keyword(s):  
Numerical Simulation ◽  
Monte Carlo ◽  
Population Dynamics ◽  
Graph Theory ◽  
Monte Carlo Method ◽  
Stochastic Model ◽  
Compact Representation ◽  
Compartmental System ◽  
The Monte Carlo Method ◽  
Different Types

An approach to the construction of a stochastic model of population dynamics distributed over a compartmental system with pipes is proposed. Population dynamics is described in terms of a multidimensional random process of birth and death, supplemented by taking into account point distributions reflecting different types of particles. In this model, the belonging of a particle to a certain type is determined by the time of its transition between compartments. The duration of particle transitions through the pipes are not random, but are set as parameters of the environment in which the population develops. Graph theory is used for formalization and compact representation of the model. On the basis of the Monte Carlo method the algorithm of numerical simulation of population dynamics is constructed. The results of computational experiments for a system consisting of five compartments are presented.

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