The large-particle method in arbitrary nets and its application to the solution of problems in the aeroelasticity of a parachute

1991 ◽  
Vol 57 (5) ◽  
pp. 3361-3366
Author(s):  
S. A. Logvinenko ◽  
I. N. Timoshina ◽  
Yu. V. Moseev
Keyword(s):  
Large Particle ◽  
Particle Method

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

scholarly journals Application of a hybrid large-particle method for calculating multicomponent gas mixture flows

2019 ◽  
pp. 489-497
Author(s):  
Д.В. Садин
Keyword(s):  
Large Particle ◽  
Order Approximation ◽  
Particle Method ◽  
Numerical Results ◽  
Gas Mixture ◽  
Wide Range ◽  
Multicomponent Gas ◽  
Self Similar ◽  
Similar Solutions ◽  
Multicomponent Gas Mixture

Статья посвящена обобщению гибридного метода крупных частиц для численного моделирования течений многокомпонентных газовых смесей при наличии границ раздела газов с различными термодинамическими свойствами. Метод относится к алгоритмам сквозного расчета разрывов. Разностная схема является консервативной, однородной и имеет второй порядок аппроксимации по пространству и времени на гладких решениях. Результаты проверки на тестовых задачах в широком диапазоне чисел Маха и отношений газодинамических параметров подтвердили работоспособность метода. Выполнен анализ численных ошибок в окрестности контактных разрывов на сетках различного разрешения, свидетельствующий о сходимости результатов расчета к автомодельным решениям. This paper is devoted to a generalization of a hybrid large-particle method for the numerical simulation of multicomponent gas mixture flows in the presence of gas interfaces with various thermodynamic properties. The method belongs to the class of shock-capturing and interface-capturing algorithms. The employed difference scheme is conservative and uniform and possesses the second order approximation in space and time on smooth solutions. The obtained numerical results show the efficiency of the method in a wide range of Mach numbers and ratios of gas dynamic parameters. The error analysis performed near the contact discontinuities on grids of various resolutions confirms the convergence of numerical results to the self-similar solutions.

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