Calculation of some internal gas flows by the ?large-particle? method

1978 ◽  
Vol 14 (4) ◽  
pp. 420-425 ◽  
Author(s):  
Yu. M. Davydov
Keyword(s):  
Large Particle ◽  
Particle Method ◽  
Gas Flows

scholarly journals Simulation of physical instability on contact boundaries in multicomponent compressible gas flows by a hybrid large-particle method

2020 ◽  
pp. 129-137
Author(s):  
Д.В. Садин
Keyword(s):  
Large Particle ◽  
Order Approximation ◽  
Wave Interaction ◽  
Particle Method ◽  
Gas Flows ◽  
Shock Wave Interaction ◽  
Heavy Gas ◽  
Inhomogeneous Gas ◽  
Comparison With Experiments ◽  
Physical Instability

Статья посвящена развитию гибридного метода крупных частиц применительно к двумерным течениям с развитием физической неустойчивости на поверхностях раздела неоднородных газовых смесей. Высокая разрешающая способность метода продемонстрирована при решении задач взаимодействия ударной волны с цилиндрическим пузырем легкого или тяжелого газов в сравнении с экспериментом и расчетами по другим схемам повышенного порядка аппроксимации. This paper is devoted to the development of a large-particle hybrid method for two-dimensional flows with physical instability on the interface of inhomogeneous gas mixtures. The high resolving capacity of the method is shown for problems of shock wave interaction with a cylindrical bubble of a light or heavy gas in comparison with experiments and simulations using other schemes of higher-order approximation.

Investigation of flow past blunt bodies with allowance for radiation by the large-particle method

1983 ◽  
Vol 17 (4) ◽  
pp. 574-579
Author(s):  
O. M. Belotserkovskii ◽  
Yu. M. Davydov ◽  
V. P. Skotnikov ◽  
V. N. Fomin
Keyword(s):  
Large Particle ◽  
Particle Method ◽  
Flow Past ◽  
Blunt Bodies

scholarly journals Simulation of a shock wave interaction with a bounded inhomogeneous gas–particle layer using the hybrid large-particle method

2021 ◽  
pp. 1-13
Author(s):  
Д.В. Садин ◽  
И.О. Голиков ◽  
В.А. Давидчук
Keyword(s):  
Shock Wave ◽  
Large Particle ◽  
Order Approximation ◽  
Wave Interaction ◽  
Particle Method ◽  
Relaxation Processes ◽  
Gas Suspension ◽  
Shock Wave Interaction ◽  
Mixture Density ◽  
Particle Layer

Исследуются задачи взаимодействия ударной волны с ограниченным слоем газовзвеси, внутри которого имеется неоднородность квадратного сечения пониженной или повышенной плотности. Для расчетов используется гибридный метод крупных частиц второго порядка аппроксимации по пространству и времени. Правильность численных разрывных решений, в частности скачков пористости, подтверждается сравнением с асимптотически точными профилями плотности смеси. Приведены аналитические зависимости ослабления ударной волны слоем газовзвеси. Изучены ударно-волновые структуры в двумерных областях и влияние на них релаксационных процессов. The problems of shock wave interaction with a bounded layer of gas suspension is studied in the case when a square-section inhomogeneity of reduced or increased density is situated inside this layer. The hybrid large-particle method of the second-order approximation in space and time is used for calculations. The numerical correctness of discontinuous solutions, in particular jumps of porosity, is confirmed by comparison with the asymptotically exact profiles of the mixture density. Analytical dependences of shock wave attenuation by a gas suspension layer are given. Shock-wave structures in two-dimensional regions and the effect of relaxation processes on them are analyzed.

Aspects of modeling the effect of temperature stratification in the vortex tube channel

2010 ◽  
Vol 7 ◽  
pp. 163-171
Author(s):  
D.F. Marin ◽  
C.I. Mikhaylenko ◽  
L.H. Khaziev
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Energy Distribution ◽  
Large Particle ◽  
Vortex Tube ◽  
Particle Method ◽  
Effect Of Temperature ◽  
Hot Air ◽  
Cylindrical Coordinate ◽  
Tube Channel

A direct numerical simulation of the Ranque-Hilsch effect in a counterflow vortex tube with a diameter of the hot air diaphragm coinciding with the diameter of the tube was performed. We used DNS-modeling on the basis of the large-particle method in a cylindrical coordinate system, which allows us to take into account the scale of large turbulent vortices. An analysis of the energy distribution in the system under consideration gave a picture of the temperature distribution in the volume of the vortex tube.

Mathematical modelling of two-phase twisted flows using a modified large-particle method

1988 ◽  
Vol 28 (1) ◽  
pp. 58-65 ◽  
Author(s):  
I.Kh. Enikeyev ◽  
O.F. Kuznetsova ◽  
V.A. Polyanskii ◽  
E.F. Shurgal'skii
Keyword(s):  
Mathematical Modelling ◽  
Large Particle ◽  
Particle Method ◽  
Two Phase ◽  
Twisted Flows
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