B 16 Baidakov, V. G. On curvature-dependent surface tension of liquid and vapour nuclei [Text] / V. G. Baidakov, G. Sh. Boltachev // Nucleation and Non-linear Prolems in the First-Order Phase Transitions (NPT'98): Final Programme and Book of Abstracts: First Int. Workshop (St. Peterburg, Pussia, 29 June - 3 July 1998). - 1998. - P12-13 Рубрики: ФИЗИКА Кл.слова (ненормированные): ТЕПЛОФИЗИКА -- ФОРУМЫ -- РЕФЕРАТЫ -- НАТЯЖЕНИЕ ПОВЕРХНОСТНОЕ -- ПОВЕРХНОСТНОЕ НАТЯЖЕНИЕ -- ЖИДКОСТИ -- ЗАРОДЫШИ ПАРОВЫЕ -- ПАРОВЫЕ ЗАРОДЫШИ -- КРИВИЗНА ПОВЕРХНОСТЕЙ |
B 16 Baidakov, V. G. Nucleation in superheated liquid argon-kripton solutions [Text] / V. G. Baidakov, A. M. Kaverin, G. Sh. Boltachev // Journal of Chemical Physics. - 1997. - V.106, N13. - P5648-5657 Рубрики: ФИЗИКА Кл.слова (ненормированные): АРГОН-КРИПТОН РАСТВОРИМЫЙ -- ЗАРОДЫШЕОБРАЗОВАНИЕ -- АРГОН-КРИПТОН ЖИДКИЙ -- АРГОН-КРИПТОН ПЕРЕГРЕТЫЙ -- АРГОН -- Ar -- КРИПТОН -- Kr |
B 16 Baidakov, V. G. Curvature dependence of the surface tension of liquid and vapor nuclei [Text] / V. G. Baidakov, G. Sh. Boltachev // Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 1999. - V.59, N1. - P469-475 Рубрики: ФИЗИКА Кл.слова (ненормированные): КРИВАЯ ЗАВИСИМОСТИ -- УРОВЕНЬ НАПРЯЖЕНИЯ -- ЗАРОДЫШИ ЖИДКИЕ -- ЗАРОДЫШИ ПАРОВЫЕ \\EXPERT2\NBO\Physical Review E\1999, v.59, N 1, p. p469.pdf |
S 34 Schmelzer, J. W. P. Classical and generalized Gibbs' approaches and the work of critical cluster formation in nucleation theory [Electronic resource] / J. W. P. Schmelzer, G. Sh. Boltachev, V. G. Baidakov // Journal of Chemical Physics. - 2006. - Vol. 124, № 19. - P194503/1-194503/18 Рубрики: ФИЗИКА Кл.слова (ненормированные): CLUSTERS Аннотация: In the theoretical interpretation of the kinetics of first-order phase transitions, thermodynamic concepts developed long ago by Gibbs are widely employed giving some basic qualitative insights into these processes. However, from a quantitative point of view, the results of such analysis, based on the classical Gibbs approach and involving in addition the capillarity approximation, are often not satisfactory. Some progress can be reached here by the van der Waals and more advanced density functional methods of description of thermodynamically heterogeneous systems having, however, its limitations in application to the interpretation of experimental data as well. Moreover, both mentioned theories—Gibbs’ and density functional approaches—lead to partly contradicting each other’s results. As shown in preceding papers, by generalizing Gibbs’ approach, existing deficiencies and internal contradictions of these two well-established theories can be removed and a new generally applicable tool for the interpretation of phase formation processes can be developed. In the present analysis, a comparative analysis of the basic assumptions and predictions of the classical and the generalized Gibbs approaches is given. It is shown, in particular, that—interpreted in terms of the generalized Gibbs approach—the critical cluster as determined via the classical Gibbs approach corresponds not to a saddle but to a ridge point of the appropriate thermodynamic potential hypersurface. By this reason, the classical Gibbs approach (involving the classical capillarity approximation) overestimates as a rule the work of critical cluster formation in nucleation theory and, in general, considerably. \\\\Expert2\\NBO\\Journal of Chemical Physics\\2006, v.124, p.194503.pdf |
B 74 Boltachev, G. Sh. The Second and Third Virial Coefficients of Simple Fluids [Electronic resource] / G. Sh. Boltachev, V. G. Baidakov // High Temperature. - 2006. - Vol. 44, № 1. - P83-90 Рубрики: ФИЗИКА Кл.слова (ненормированные): FLUID CONDITION Аннотация: The asymptotic behavior of the second B and third C virial coefficients in the low temperature region is analyzed for fluids with a spherical pair-additive potential of interparticle interaction. The temperature dependences B( T) and C( T) are approximated by expressions which convey correctly the behavior of the virial coefficients in the low-and high-temperature limits. The free parameters of approximation formulas for pure nitrogen, argon, and oxygen are determined. The derived virial equations of state are used to calculate the limit of significant instability of the gas phase in a wide temperature range. \\\\Expert2\\NBO\\High Temperature\\2006, v.44, p.83.pdf |
B 74 Boltachev, G. Sh. Properties of argon liquid-vapor interface [Electronic resource] / G. Sh. Boltachev, V. G. Baidakov // Colloid Journal (Translation of Kolloidnyi Zhurnal). - 2006. - Vol. 68, № 1. - P26-31 Рубрики: ФИЗИКА Кл.слова (ненормированные): ARGON Аннотация: The short-wave cutoff boundary of the capillary wave spectrum is established. Effective thickness L b of the “bare” density profile in the interfacial layer is calculated according to experimental data on the ellipticity ratio of reflected light. The free parameters of the extended van der Waals theory of capillarity are determined. The positions of the equimolecular dividing surface and tension surface are calculated, as well as the temperature dependence of the Tolman parameter. \\\\Expert2\\NBO\\Colloid Journal\\2006, V.68, N1,26.pdf |
B 16 Baidakov, V. G. Inclusion of corrections of the highest order of smallness in the Van der Waals capillarity theory [Electronic resource] / V. G. Baidakov, G. Sh. Boltachev // High Temperature. - 2005. - Vol. 43, № 4. - P538-545 Рубрики: ФИЗИКА Кл.слова (ненормированные): VAN-DER-WAALS CHAIN-MOLECULE FLUID Аннотация: An extended version of the Van der Waals capillarity theory is suggested, which describes the liquid-vapor interface in the temperature range from the triple to critical point. A model functional of thermodynamic potential of a two-phase Lennard-Jones system is suggested, which takes into account the impact of higher terms of gradient expansion. The identity of the thermodynamic and mechanical definitions of the Tolman parameter is proved within the accepted form of the functional. The properties of the liquid and vapor phase nuclei are described. The work of nucleation, the density profiles, and the dimensional dependence of surface tension are determined. \\\\Expert2\\NBO\\High Temperature\\2005, v.43, p.538.pdf |
B 74 Boltachev, G. Sh. Surface tension at a weakly curved liquid-gas interface [Текст] / G. Sh. Boltachev, V. G. Baidakov // Zhurnal Fizicheskoi Khimii. - 2004. - Vol. 78, № 9. - С. 1576-1583 Рубрики: ФИЗИКА Кл.слова (ненормированные): LIQUID-GAS |
B 16 Baidakov, V. G. Extended version of the Van der Waals capillarity theory [Electronic resource] / V. G. Baidakov, G. Sh. Boltachev // Journal of Chemical Physics. - 2004. - Vol. 121, № 17. - P8594-8601 Рубрики: ФИЗИКА Кл.слова (ненормированные): VAN-DER-WAALS CHAIN-MOLECULE FLUID Аннотация: An extended version of the van der Waals capillarity theory describing the liguid-vapor interface in the temperature range from the triple to the critical point is suggested. A model functional of thermodynamic potential for a two-phase Lennard-Jones system taking into account the effect of the highest degree terms of gradient expansion has been constructed. The identity of the thermodynamic and the mechanical definition of Tolman’s length has been proved in the framework of the adopted form of functional. The properties of nuclei of the liquid and the vapor phase are described. The paper determines: the work of formation of a nucleus, density profiles, size dependences of the surface tension, and the parameter ? in the Gibbs-Tolman-Koenig-Buff equation.© 2004 American Institute of Physics. \\\\Expert2\\NBO\\Journal of Chemical Physics\\2004, v.121, p.8594, V. G. Baidakov.pdf |
B 74 Boltachev, G. Sh. Space charge influence on the angle of conical spikes developing on a liquid-metal anode [Electronic resource] / G. Sh. Boltachev, N. M. Zubarev, O. V. Zubareva // Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2008. - Vol. 77, № 5-2. - P056607/1-056607/10 Рубрики: ФИЗИКА Кл.слова (ненормированные): ARGON Аннотация: The influence of the space charge of ions emitted from the surface of a conical spike on its shape has been studied. The problem of the calculation of the spatial distributions of the electric field, ion velocity field, and the space charge density near the cone tip has been reduced to the analysis of a system of ordinary differential equations. As a result of numerical solution of these equations, the criterion for the balance of the capillary and electrostatic forces on the conic surface of a liquid-metal anode has been determined. It has allowed us to relate the electrical current flowing through the system, the applied potential difference, and the cone angle. We have compared the results of our calculations with available experimental data concerning emission from the surface of pure liquid gallium, indium, tin, and some liquid alloys, such as Au+Si, Co+Ge, and Au+Ge. On the basis of the proposed model, explanations have been given for a number of specific features of the emissive behavior of different systems. \\\\Expert2\\NBO\\Physical Review E\\2008, v.77, N 5, p.056607.pdf |
S 61 Simulation of radial pulsed magnetic compaction of a granulated medium in a quasi-static approximation [Electronic resource] / G. Sh. Boltachev, N. V. Volkov, S. V. Dobrov, V. V. Ivanov, A. A. Nozdrin, S. N. Paranin // Technical Physics. - 2007. - Vol. 52, № 10. - P1306-1315 Рубрики: ФИЗИКА Кл.слова (ненормированные): MAGNETIC COMPACTION Аннотация: Compression adiabats for alumina-based nanopowders are obtained experimentally, various conditions of pulsed magnetic cylindrically symmetric radial compaction of the nanopowders are tested, and the density distribution in the compacted powders are measured. Using the compression adiabats obtained, quasi-static compaction of a granulated (porous) medium, which is considered to be compact, is simulated. The conditions of uniform and equilibrium compaction on a rigid rod are analyzed. The voidage distribution, stress tensor, and amount of accumulated deformation are calculated. The features of nanopowder compaction, specifically, the presence (absence) of voidage nonuniform radial distribution, are explained. \\\\Expert2\\NBO\\Technical Physics\\2007, v.52, N 10, p.1306.pdf |
B 74 Boltachev, G. Sh. Influence of the space charge on the configuration of conical spikes on a liquid-metal surface [Текст] / G. Sh. Boltachev, N. M. Zubarev // Europhysics Letters. - 2006. - Vol. 76, № 1. - С. 36-41 Рубрики: ФИЗИКА Кл.слова (ненормированные): METAL SURFACE Аннотация: The influence of the space charge of ions evaporated from the surface of a conical spike that develops on a liquid-metal anode on the spike shape has been studied theoretically. A possibility of the self-similar reduction of the equations that govern the space distributions of the electric field, ion velocity field, and space charge density to a system of ordinary differential equations has been revealed. Its solution, which is compatible with the balance condition for the capillary and electrostatic forces at a free liquid surface, has allowed us to obtain the current-voltage characteristic for a liquid-metal ion source and the current dependence of the cone angle. An increase in emission current leads to a monotonic decrease of the cone angle, which agrees with the available experimental data. |
B 16 Baidakov, V. G. Surface-Tension on the Liquid-Vapor Interface for Critical Nuclei [] / V. G. Baidakov, G. Sh. Boltachev // Zhurnal Fizicheskoi Khimii. - 1995. - V.69, Is.3. - С. 515-520 Рубрики: ФИЗИКА Кл.слова (ненормированные): TENSION SURFACE -- INTERFACE LIQUID-VAPOR -- LIQUID -- VAPOR -- NUCLEI CRITICAL |
B 16 Baidakov, V. G. The Properties of a Plane Liquid-Vapor Interphase Boundary of Gas-Saturated Solutions [] / V. G. Baidakov, G. Sh. Boltachev // Russian Journal of Physical Chemistry A. - 2001. - Vol. 75, N 1. - С. 21-26 Рубрики: ФИЗИКА Кл.слова (ненормированные): PLANE LIQUID-VAPOR INTERPHASE BOUNDARY -- INTERPHASE BOUNDARIES -- LIQUID-VAPOR -- GAS-SATURATED SOLUTIONS |
B 16 Baidakov, V. G. The Properties of a Curved Liquid-Vapor Interphase Boundary of Gas-Saturated Solutions [] / V. G. Baidakov, G. Sh. Boltachev // Russian Journal of Physical Chemistry A. - 2001. - Vol. 75, N 1. - С. 27-31 Рубрики: ФИЗИКА Кл.слова (ненормированные): PROPERTIES OF INTERPHASE BOUNDARIES -- CURVAD LIQUID-VAPOR INTERPHASE BOUNDARY -- LIQUID-VAPOR -- GAS-SATURATED SOLUTIONS |
B 74 Boltachev, G. Sh. On the Discrepancy between the Theory of Homogeneous Nucleation and Experimental Data for Gas-Saturated Liquids at Low Temperatures [] / G. Sh. Boltachev, V. G. Baidakov // Russian Journal of Physical Chemistry A. - 2001. - V. 75, N 9. - С. 1455-1458. - Bibliogr: p. 1458 (111 ref.) . - ISSN 0044-4537 Рубрики: ФИЗИКА Кл.слова (ненормированные): HOMOGENEOUS NUCLEATION -- THEORY OF HOMOGENEOUS NUCLEATION -- LIQUIDS -- GAS-SATURATED LIQUIDS -- LOW TEMPERATURES |
B 16 Baidakov, V. G. Nucleation at retrograde condensation [] / V. G. Baidakov, G. Sh. Boltachev // AIP Conference Proceedings. - 2000. - Vol. 534, Is. 1. - 295-298: graph. . - ISSN 0094-243X Рубрики: ФИЗИКА Кл.слова (ненормированные): NUCLEATION -- CONDENSATION -- SURFACE TENSION -- RETROGRADE CONDENSATION Аннотация: A binary Van-der-Waals solution is considered. Within the framework of the Gibbs and Van-der-Waals capillary theories under the conditions of constancy of the temperature and the composition the sise dependences of surface tension s(R) are calculated for critical nuclei of liquid and vapor. The phenomenon of "closure" of size dependences s(R) and the presence anomalously of high maximums on them are established |
S 34 Schmelzer, J. W. P. Kinetics of Boiling in Binary Liquid-Gas Solutions : A New Approach / J. W. P. Schmelzer, V. G. Baidakov, G. Sh. Boltachev // Nucleation Theory and Applications. - Dubna : JINR, 2002. - С. 120-145. - Bibliogr. : p.140-145 (83 ref.) Рубрики: ФИЗИКА Кл.слова (ненормированные): CLUSTERS -- LIQUIDS -- HOMOGENEOUS NUCLEATION |
B 16 Baidakov, V. G. Kinetics of boiling-up of a gassed liquid / V. G. Baidakov, A. M. Kaverin, G. Sh. Boltachev // Heat Transfer Research. - 2007. - Vol.38, №3. - С. 211-221 Рубрики: ФИЗИКА Кл.слова (ненормированные): LIQUID -- SOLUTIONS -- INERTIAL FORCES Аннотация: A theory of the spontaneous boiling-up of supersaturated liquid solutions, which allows for all major factors limiting growth of a nucleus, such as volatility of solution components, viscous and inertial forces, and diffusional supply of a substance to the bubble, is proposed. Two approaches to determining the work of critical nucleus formation, based on the Gibbs method of diving surfaces and the Van der Waals theory of capillarity, are reviewed. Experimental data on the kinetics of boiling-up of nitrogen-helium and oxygen-helium solutions are presented. The results of the experiments are compared to the theoretical approaches to the problem of nucleation in gassed liquids, developed by the authors |
B 74 Boltachev, G. Sh. The thermodynamic properties of nitrogen, argon, oxygen, and their mixtures in the region of the liquid-gas phase transition / G. Sh. Boltachev, V. G. Baidakov // Russian Journal of Physical Chemistry. - 2006. - Vol.80, №4. - С. 501-504 Рубрики: ФИЗИКА Кл.слова (ненормированные): EQUATION OF STATE -- PRESSURES -- MPA Аннотация: A procedure for constructing the equation of state for metastable and labile regions in the liquid gas phase transition is suggested. A consistent description of p, rho, T, and caloric properties was obtained. The spinodals of both pure fluids and their mixtures were located |