cylindrical channel
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Author(s):  
Andrey V. Utkin ◽  
◽  
Vasily M. Fomin

In this study, molecular dynamic simulations of quasi-static compression of silicon carbide nanorod, were performed. A longitudinal through defect in the form of a cylindrical channel was in- troduced into the central part of the nanorod. The influence of the cross sectional size of this internal channel on the strength properties was investigated


2021 ◽  
Author(s):  
Anatoly A. Khvostov ◽  
Aleksey A. Zhuravlev ◽  
Elena A. Shipilova ◽  
Anatoly A. Nikitchenko ◽  
Dmitry N. Vnukov

2021 ◽  
Vol 2057 (1) ◽  
pp. 012029
Author(s):  
M S Makarov ◽  
S N Makarova

Abstract The results of numerical studies of energy separation of a helium-xenon gas mixture in a single Leontiev tube with a central cylindrical channel are presented. On the basis of the simulation data, a T-s diagram for energy separation is constructed. The changes in the total temperature depending on the entropy change in the central subsonic channel and in the annular supersonic nozzle are shown.


Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 278
Author(s):  
Sergey Denisikhin ◽  
Vladislav Emelyanov ◽  
Konstantin Volkov

A numerical simulation of the gas-dynamic processes in the thrust vectorable nozzle of the solid rocket motor is considered. Construction of a geometric model and a generation of computational mesh, and reconstruction of model and mesh at each time step are discussed. Calculations of the flowfield of combustion products in the pre-nozzle chamber and nozzle block are carried out for various angles of nozzle rotation. The distributions of the gas dynamic quantities in the pre-nozzle volume corresponding to the outflow of the combustion products from the cylindrical channel and star-shaped channel are compared, as well as the solutions of the problem obtained with quasi-stationary and unsteady formulations. The effects of the channel shape on the distribution of flow quantities and formation of a vortical flow structure in the nozzle block are discussed.


Author(s):  
Andrey Yu. Zubarev ◽  
Dmitry Chirikov ◽  
Anton Musikhin ◽  
Maxime Raboisson-Michel ◽  
Gregory Verger-Dubois ◽  
...  

We present results of theoretical modelling of macroscopic circulating flow induced in a cloud of ferrofluid by an oscillating magnetic field. The cloud is placed in a cylindrical channel filled by a nonmagnetic liquid. The aim of this work is the development of a scientific basis for a progressive method of addressing drug delivery to thrombus clots in blood vessels with the help of the magnetically induced circulation flow. Our results show that the oscillating field can induce, inside and near the cloud, specific circulating flows with the velocity amplitude about several millimetres per second. These flows can significantly increase the rate of transport of the molecular non-magnetic impurity in the channel. This article is part of the theme issue ‘Transport phenomena in complex systems (part 1)’.


2021 ◽  
Vol 409 ◽  
pp. 39-48
Author(s):  
S. Gourari ◽  
Fateh Mebarek-Oudina ◽  
Oluwole Daniel Makinde ◽  
M. Rabhi

Two-phase flows are widely encountered in many natural phenomena and industrial processes. The presence of one or more interfaces between the two phases presents a major difficulty which makes the modeling and the simulation of this type of flow complex. This work consists in performing a three-dimensional numerical simulation of a two-phase Hydrogen-Water flow inside a horizontal cylindrical channel. The results are obtained in the form of velocity contours, enthalpy and pressures.


2021 ◽  
Vol 73 (1) ◽  
pp. 103-109
Author(s):  
V.N. Kossov ◽  
◽  
V. Mukamedenkyzy ◽  
Z.Z. Yuldasheva ◽  
A. Khasseinova ◽  
...  

The characteristics of convective flows arising in three-component gas mixtures are investigated by the method of numerical simulation. The time variation of the isoconcentration lines of the heavy component of the mixture and the average velocity are considered as characteristics of convective flows. To calculate the characteristics of convective flows arising in a vertical cylindrical channel, we used a numerical model based on the splitting scheme according to physical parameters. It was shown that in three-component gas mixtures, where special diffusion regimes are manifested, non-monotonic distributions of component concentrations and velocities are possible. The time of loss of stability of mechanical equilibrium and the time of developed convective flows are determined.


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