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[en] The preliminary results of development of a new heat transfer correlation for supercritical water flowing in vertical heated tubes have been reported. It has been shown through a comparison with experimental data that the suggested method of allowance for variations of water thermophysical properties near the critical point provides a satisfactory agreement of the predicted and experimental results
[ru]
Подведены предварительные итоги исследования, основной целью которого является получение нового уравнения для инженерных расчетов теплоотдачи от поверхности обогреваемых вертикальных труб при движении в них воды сверхкритического давления. Путем сравнения с большим массивом экспериментальных данных показано, что предлагаемый метод учета сильного изменения теплофизических свойств теплоносителя вблизи критической точки обеспечивает удовлетворительное согласование расчетных и экспериментальных результатовJournal
Vestnik Natsional'nogo Issledovatel'skogo Yadernogo Universiteta MIFI; ISSN 2304-487X; 
; v. 3(3); p. 353-361
; v. 3(3); p. 353-361
[en] Temperature dependences of critical magnetic fields and critical currents of superconducting niobium films of different thickness are investigated. Experimental data are compared with the results of theoretical models. It is stated experimentally, that absolute value of critical magnetic fields Hsub(c perpendicular), Hsub(c parallel) drops with the increase of niobium film thickness and their relation Hsub(c perpendicular)/Hsub(c parallel) increases. Temperature dependences Hsub(c perpendicular), Hsub(c parallel) are linear and their slope changes with the change of film thickness. Temperature dependence of critical current density of niobium films is proportional (1-tsup(2))sup(n), where n changes from 2/3 to approximately one with decrease of film thickness. Type of pinning of vortex filaments changes in niobium films sputtered on hot substrate (tsub(n)=850 deg C) with the change of thickness. Phenomenon of cyclic instability of critical current in thin films analogous to ''train'' effect owserved in superconducting solenoids is found. It is supposed that this phenomenon is caused, first of all, by freezing of magnetic fluxes in the sample volume
Journal
Fizika Nizkikh Temperatur; ISSN 0132-6414; ; v. 6(8); p. 968-978
; v. 6(8); p. 968-978
[en] Vortex structure is considered in a superconducting corrugated film placed in an external magnetic field close to the upper critical one (Hsub(c2)). Cinzburg-Landau free energy is obtained in case of the vortex lattice and corrugation commensurability. An increase of the upper critical field is found under the above conditions. Critical currents are calculated taking into account the commensurability edge effect
[ru]
Journal
Fizika Nizkikh Temperatur; ISSN 0132-6414; ; v. 8(2); p. 180-187
; v. 8(2); p. 180-187
[en] We studied anisotropy of the upper critical field Hsub(c2) with respect to the angle theta between the magnetic field and the layers as well as peculiarities of the transition to the resistive state in pure and TCNQ-intercalated 2H-NbSe2 single crystals. The intercalation entails a critical temperature decrease, an enhancement of uper critical field anisotropy and appearance of a step-like structure of the superconducting transition
[ru]
Journal
Fizika Nizkikh Temperatur; ISSN 0132-6414; ; v. 8(2); p. 174-179
; v. 8(2); p. 174-179
[en] The aim of the paper is to describe the singularities of the heat transfer of pure liquid or gas, being in the critical state, characteristic for the critical point. It is shown that the heat transfer in a liquid flow is characterized by the fact that the thickness of the thermal boundary layers (BL) is essentially greater than the thickness of the hydrodynamic BL. The free convection in this case is turbulent and, therefore, instable
[ru]
Цель работы - описать особенности теплообмена в критическом состоянии, характерном для критической точки (КТ) чистой жидкости или газа. Показано, что теплообмен в потоке жидкости вблизи КТ характеризуется тем, что толщина теплового потока пограничного слоя (ПС) существенно больше толщины гидродинамического ПС. Свободная конвекция в этом случае является турбулентной и, следовательно, неустойчивойJournal
Doklady Akademii Nauk - Rossijskaya Akademiya Nauk; ISSN 0869-5652; ; CODEN DAKNEQ; v. 376(2); p. 191-194
; CODEN DAKNEQ; v. 376(2); p. 191-194
No abstract available
Journal
Fizika Metallov i Metallovedenie; ISSN 0015-3230; ; v. 57(4); p. 824-826
; v. 57(4); p. 824-826
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