Discovering and Modelling the Wave-Like Shapes on the Surface of Metal Deposits, being Electrodeposited under the Force Impact

Girin, O. B.; Kuzyayev, Ivan; Nikolsky, Valeriy; Yaris, Vadim

doi:10.4028/www.scientific.net/kem.844.135

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…In this paper, it is assumed that their formation results from the processes involving an increase in energy density due to the redistribution of the medium energy during its motion; that is the processes occurring in collisions of dense plasma streams flowing from the surface of the conical cavity. A similar phenomenon is found in the superdeep penetration of microparticles into metals [11][12][13][14].…”

Section: Resultssupporting

confidence: 73%

Estimation of Dense Plasma Temperature Formed under Shock Wave Cumulation

et al. 2020

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The research was carried out by means of implosion plasma generators with conical and hemispherical compression chambers to conduct a quantitative assessment of the boundary temperature of super dense plasma jets. It was proved experimentally that nuclear transformations in metals are caused by the impact of super dense plasma jets (11, ..., 12) × 103 kg/m3. The boundary temperature of these jets was evaluated. It was estimated that the nominal boundary temperature of the studied implosion plasma generators is 106 К. The pressure in the target at the penetration of the super dense jet (~12,000 kg/m3) at the speed of 28,000 m / sec is more than 30 ТPa. The boundary temperature was estimated and proved to depend on the pre-determined values only slightly. It was experimentally established that stable isotopes of manganese Mn55 (up to 27%) are formed in iron targets as a result of high temperature plasma jet penetration. The appearance of manganese must be related to iron transformation into stable isotopes Fe56 and Fe54. The obtained results may be applied for investigating structural changes in metals under the conditions of impulsive super high temperatures and pressures. This method can be also used as a testing ground for studying the physical conditions of forming chemical elements as well as super dense plasma jets.

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Section: Resultssupporting

confidence: 73%

Estimation of Dense Plasma Temperature Formed under Shock Wave Cumulation

et al. 2020

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“…With the application of cavitation technology and vortex energy in various industries, the need for the study of cavitation flows increases. However, the simultaneous existence of boundary dynamics, a phase transition, and a strong change in density greatly complicate this problem [5].…”

Section: Introductionmentioning

confidence: 99%

“…In calculating the velocity field, the heat transfer rates on both surfaces are calculated from the modified energy equation by further adding radial diffusion terms. It has been shown [5] that the addition of such physical terms with longitudinal thermal conductivity to the energy equation strongly affects the known results on heat transfer rates, especially when the cross section of the conical gap is small. The authors of [4] also present the missing heat transfer rates related to the wall of the cone.…”

Section: Introductionmentioning

confidence: 99%

The Hydrodynamics of Translational−Rotational Motion of Incompressible Gas Flow within the Working Space of a Vortex Heat Generator

et al. 2022

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The paper presents the results of analytical and experimental studies of the hydrodynamics of the translational−rotational motion of incompressible gas flow within a working space of a variable-geometry vortex heat generator. The terminal velocity and pressure have been identified analytically. The effect of vortex generation on the ratio of the parameters has been analyzed. A mathematical model has been developed with a simplified design scheme that simulates the movement inside a vortex channel with fixed elements. On the basis of mathematical modelling, the influence of the apparatus-constructive (AC) design of the working space of a vortex heat generator on the generation of vortices inside the apparatus has been analyzed. The influence of the main geometric and hydrodynamic parameters of the device on the indicators of its energy efficiency has been investigated. The obtained models show the critical regions where the most intense cavitation zones are possible. An analysis of the hydrodynamics of the incompressible gas motion within the working space of the newly designed vortex heat generator with variable geometry has helped define both the terminal velocity and pressure. In addition, the effect of the facility geometry on the generation of vortices favoring cavitation was determined. The model studies have been carried out in terms of liquid loading changes in the 0.001–0.01 m3/s range. The changes in a velocity field within a working channel have been analyzed for the channel geometry, where a cone angle γ is 0° to 25°, with 130, 70, and 40 mm widths for the working channel. It has been identified that a sufficient axial symmetry of the heat carrier along a vortex accelerator enables the heat carrier inlet through a turbulizing nozzle. The dependence of the nozzle area, the effect on the efficiency of the vortex heat generator angle of attack of the vortex accelerator, and the ratio of the length and diameter of the vortex zone of the heat generator to its energy efficiency in general have been defined experimentally. These studies could be instrumental in the design of vortex heat generators whose geometry corresponds to the current requirements concerning energy efficiency. It has been found that the geometry of the vortex accelerator improves the operation of the heat generator by 35% in comparison with similar available designs.

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Electrochemical Phase Formation in Metals under Low Force: Part 1. Increase in the Density of Electrodeposits

Girin

2022

Surf. Engin. Appl.Electrochem.

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Discovering and Modelling the Wave-Like Shapes on the Surface of Metal Deposits, being Electrodeposited under the Force Impact

Cited by 4 publications

References 17 publications

Estimation of Dense Plasma Temperature Formed under Shock Wave Cumulation

Estimation of Dense Plasma Temperature Formed under Shock Wave Cumulation

The Hydrodynamics of Translational−Rotational Motion of Incompressible Gas Flow within the Working Space of a Vortex Heat Generator

Electrochemical Phase Formation in Metals under Low Force: Part 1. Increase in the Density of Electrodeposits

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