50 Result(s)
within
V.V. Ovchinnikov
Physics
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Article
Study of cascade showers generated by near-horizontal muons in the water Cherenkov detector with a dense array of optical modules
The method for reconstructing the cascade curve by the Cherenkov radiation in water of the NEVOD detector with a dense spatial array of optical modules is discussed. Cascades are generated by near-horizontal m...
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Article
Effect of phase composition of nanostructured refractory modifier on structure and tribological behavior of AK12M2MgN alloy
The structure and tribological behavior of the AK12M2MgN alloy reinforced by nanostructured fillers based on BN and SiO2 micropowders are studied. It is shown that the modification of the micropowders by reactive...
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Article
A proposed NEVOD-EAS installation for the detection of extensive air showers
A new installation is dedicated to the independent evaluation of extensive air shower (EAS) energies detected in the NEVOD-DECOR experiment in the knee region of the energy spectrum. The design for the measuri...
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Article
Energy spectrum of cascade showers generated in water by near-horizontal muons
We discuss measuring cascade shower energy using the NEVOD Cherenkov water detector with a spatial lattice of quasi-spherical modules (QSMs). Dense QSM spacing makes it possible to reconstruct a number of casc...
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Article
Investigation of the third heat transfer crisis on a vertical surface
The process of development of the third heat transfer crisis for vertical orientation of the heating surface was studied experimentally. Experiments were carried out with acetone under the conditions of satura...
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Article
Optical emission from metal targets bombarded by 5–20 keV argon ions
The spectral composition of optical emission from high-purity iron (99.99% Fe), zirconium (99.98% Zr), and tungsten (99.96% W) targets bombarded by 5–20 keV Ar+ ions has been studied. The ion-bombardment-induced ...
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Article
The boiling up model for highly superheated liquid with formation of evaporation front
Boiling up of metastable liquid on the surface of a cylindrical heater is studied at high superheating, when the evaporation front is formed. Boiling up begins with formation of a spherical bubble on the heate...
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Article
Modeling of the vaporization front on a heater surface
The boiling-up of a metastable liquid with appearing vaporization fronts is theoretically considered. The boiling-up occurs usually on the surface of a heater. At the initial stage, growth of a spherical vapor...
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Article
Consideration of the spin density of conduction electrons in the formation of a hyperfine interaction field on 57Fe cores in disordered Fe x Cr1 − x alloys
Mössbauer spectra of quenching-disordered Fe x Cr1−x alloys were measured over a wide range of chromium concentrations (0.9–45 at %), and a detailed anal...
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Article
Computation of aeroelastic transfer functions of aircraft elements under vibrations in a compressible flow
We consider the problem on the computation of aeroelastic transfer functions of an airfoil under vibrations in a compressible flow with the actual natural frequencies of the airfoil taken into account. The pro...
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Article
Mössbauer spectroscopy study of the formation of Fe layers in Fe/Cr superlattices
The formation of Fe layers in Fe/Cr superlattices has been studied by Mössbauer spectroscopy. It is established that magnetic clusters, which appear in the initial stage of formation of Fe layers and impart su...
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Article
Vapor bubble growth at the surface of flat and cylindrical heaters
The growth dynamics are investigated of a sole vapor bubble in a nonuniform temperature field. A two-zone model is developed of the bubble growth on the solid surface. The calculation results are in satisfacto...
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Article
Third heat transfer crisis at subcooling
The effect of liquid subcooling below the saturation temperature on the third heat transfer crisis was studied experimentally at pool boiling. Experimental data on the threshold values of superheating and heat...
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Article
Model of steady motion of the interface in a layer of a strongly superheated liquid
Steady propagation of the boundary of a vapor cavity in a layer of a metastable liquid along the heater surface is considered. The temperature and velocity of interface propagation are determined from the equa...
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Article
Dynamics of a vapor bubble in a nonuniformly superheated fluid at high superheat values
Results of numerical simulation of the growth of a vapor bubble in a nonuniformly superheated liquid are presented. The effect of the nonuniformity of the temperature on the growth dynamics of the vapor bubble...
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Article
Structural features of aluminium alloy 1441 irradiated by Ar+ ions
Using electron microscopy it was found that irradiation of clad cold-worked specimens made of commercial aluminium-lithium alloy 1441 by the Ar + ions of energy 40 keV at low doses of irradiation ...
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Article
The impact of bombardment by accelerated ions on effects related to the thermomagnetic treatment of ferromagnetic materials
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Article
Enhanced atomic short-range ordering of the alloy Fe–15 at. % Cr caused by ion irradiation at elevated temperature and thermal effects only
A solid solution of 15 at. % Cr in α-Fe was prepared by rapid quenching from 1200 °C and cold plastic deformation (foils 30-μm thick). Under ion irradiation at a temperature of 450 °C with the use of 20-keV Ar+ a...
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Article
Structural inhomogeneity and magnetic properties of soft magnetic materials
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Third heat‐transfer crisis with stepwise heat supply
The paper reports experimental results on heat‐transfer crises with stepwise heat supply to a heater, in which the metastable liquid decomposes in the form of vaporization fronts. Data on the dynamics of heat‐...
