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Лебедев Владимир Валентинович

Международная лаборатория физики конденсированного состояния

Профиль на hse.ru ↗ тел.: 15234
Публикаций
71
Языков
1
Наград
11
Конференций
0
Профиль Публикации (71) Курсы (6)

Профессиональные интересы

Динамические свойства сильно неравновесных систем и мягкой материи: турбулентность, динамика полимерных растворов, динамика жидких кристаллов, динамика биологических мембран.

Должности

  • Главный научный сотрудник — Международная лаборатория физики конденсированного состояния
  • Профессор — Факультет физики
  • Академический руководитель образовательной программы — Физика

Био

  • · Начал работать в НИУ ВШЭ в 2016 году.
  • · Научно-педагогический стаж: 55 лет.

Образование

  • 2003 · Член-корреспондент РАН
  • 1990 · Доктор физико-математических наук
  • 1979 · Кандидат физико-математических наук
  • 1976 · Специалитет: Московский физико-технический институт, факультет: ФОПФ, специальность «Автоматика и электроника», квалификация «Инженер-физик»

Опыт работы

  • · Академический руководитель магистерской программы на факультете физики НИУ ВШЭ.
  • · Чтение лекций для студентов НИУ ВШЭ и МФТИ.
  • · 2003—2018: директор Института теоретической физики имени Л.Д.Ландау РАН
  • · 8 лет заведующий лабораторией современной гидродинамики, руководство студентами и аспирантами, более 150 публикаций в рецензируемых журналах.

Награды и поощрения

  • · Благодарность проректора НИУ ВШЭ (январь 2026)
  • · Благодарность проректора НИУ ВШЭ (январь 2025)
  • · Благодарность декана факультета физики НИУ ВШЭ (январь 2023)
  • · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025, 2023–2024)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022, 2019–2021, 2017–2018)
  • · Лучший академический руководитель в номинации «Прием иностранных студентов» — 2025
  • · Лучший академический руководитель в номинации «Сбалансированность образования» — 2025
  • · Лучший академический руководитель в номинации «Лояльность студентов к продолжению образования в НИУ ВШЭ» — 2023–2024
  • · Лучший академический руководитель в номинации «Удовлетворенность студентов качеством образовательной программы» — 2024
  • · Лучший академический руководитель в номинации «Привлечение студентов» — 2023
  • · Лучший академический руководитель в номинации «Работа студентов с внешними заказчиками» — 2023

Гранты и проекты

  • 2016 · Парфеньев Владимир Михайлович, ««Нелинейные явления в плазмонике и гидродинамике: теория спазера и генерация завихренности поверхностными волнами»» Кандидатская диссертация, научный руководитель: Лебедев В.В., 01.04.02 — теоретическая физика Дата защиты: 30 декабря 2016 Текст диссертации выложен на сайте ИТФ им. Л.Д.Ландау РАН 17 июня 2016г.
  • 2016 · Белан Сергей Александрович, ««Статистические модели динамики инерционных частиц в пространственно-неоднородных турбулентных течениях»» Кандидатская диссертация, научный руководитель: Лебедев В.В., 01.04.02 — теоретическая физика Дата защиты: 30 декабря 2016 Текст диссертации выложен на сайте ИТФ им. Л.Д.Ландау РАН 17 июня 2016г.

Идентификаторы исследователя

  • ORCID: 0000-0002-2932-4856
  • ResearcherID: K-1858-2017
  • SPIN РИНЦ: 6595-7991
  • Scopus AuthorID: 8971405800

Публикации (71)

Velocity statistics inside coherent vortices generated by the inverse cascade of $2d$ turbulence

2016 · ARTICLE · en

We analyze velocity fluctuations inside coherent vortices generated as a result of the inverse cascade in the two-dimensional ($2d$) turbulence in a finite box. As we demonstrated in \citep{16KL}, the universal velocity profile, established in \citep{14LBFKL}, corresponds to the passive regime of the flow fluctuations. The property enables one to calculate correlation functions of the velocity fluctuations in the universal region. We present the results of the calculations that demonstrate a non-trivial scaling of the structure function. In addition the calculations reveal strong anisotropy of the structure function.

DOI ↗ PDF ↗

Theory of the anomalous critical behavior fot the smectic-A - hexatic transition

2016 · ARTICLE · en

We propose a theoretical explanation for the long-standing problem of the anomalous critical behavior of the heat capacity near the smectic- A –hexatic phase transition. Experiments find a large specific heat critical exponent α = 0 . 5–0.7, which is inconsistent with a small negative value α ≈− 0 . 01 expected for the three- dimensional XY universality class. We show that most of the observed features can be explained by treating simultaneously fluctuations of the hexatic orientational and translational (positional) order parameters. Assuming that the translational correlation length ξ tr is much larger than the hexatic correlation length ξ h , we calculate the temperature dependence of the heat capacity in the critical region near the smectic- A –hexatic phase transition. Our results are in quantitative agreement with the calorimetric experimental data.

DOI ↗ PDF ↗

Theory of the anomalous critical behavior fot the smectic-A - hexatic transition

2016 · ARTICLE · en

We propose a theoretical explanation for the long-standing problem of the anomalous critical behavior of the heat capacity near the smectic-A–hexatic phase transition. Experiments find a large specific heat critical exponent α=0.5–0.7, which is inconsistent with a small negative value α=-0.01 expected for the three- dimensional XYuniversality class. We show that most of the observed features can be explained by treating simultaneously fluctuations of the hexatic orientational and translational (positional) order parameters. Assuming that the translational correlation length ξ is much larger than the hexatic correlation length ξh, we calculate thetemperature dependence of the heat capacity in the critical region near the smectic- A–hexatic phase transition. Our results are in quantitative agreement with the calorimetric experimental data.

DOI ↗ PDF ↗

Nonlinear generation of vorticity by surface waves

2016 · ARTICLE · en

We demonstrate that waves excited on a fluid surface produce local surface rotation owing to hydrodynamic nonlinearity. We examine theoretically the effect and obtain an explicit formula for the vertical vorticity in terms of the surface elevation. Our theoretical predictions are confirmed by measurements of surface motion in a cell with water where surface waves are excited by vertical and harmonic shaking the cell. The experimental data are in good agreement with the theoretical predictions. We discuss physical consequences of the effect.

DOI ↗ PDF ↗

Effects of thin film and Stokes drift on the generation of vorticity by surface waves

2016 · ARTICLE · en

Recently a theoretical scheme explaining the vorticity generation by surface waves in liquids was developed [Phys. Rev. Lett.116,054501(2016)]. Here we study how a thin (monomolecular) film presented on the surface of liquid affects the generated vorticity. We demonstrate that the vorticity becomes parametrically larger than for the case of liquid with a free surface, and the parameter is the quality factor of surface waves up to numerical factor. We also discuss the PIV experimental scheme intended to observe the generated vorticity and find that Stokes drift influences the measured velocity field. Explicit expression for the vertical vorticity was obtained.

DOI ↗ PDF ↗

Nonlinear Generation of Vorticity by Surface Waves

2016 · ARTICLE · en

We demonstrate that waves excited on a fluid surface produce local surface rotation owing to hydrodynamic nonlinearity. We examine theoretically the effect and obtain an explicit formula for the vertical vorticity in terms of the surface elevation. Our theoretical predictions are confirmed by measurements of surface motion in a cell with water where surface waves are excited by vertical and harmonic shaking the cell. The experimental data are in good agreement with the theoretical predictions. We discuss physical consequences of the effect.

DOI ↗

Wave Kinetics of Random Fibre Lasers

2015 · ARTICLE · en

Traditional wave kinetics describes the slow evolution of systems with many degrees of freedom to equilibrium via numerous weak non-linear interactions and fails for very important class of dissipative (active) optical systems with cyclic gain and losses, such as lasers with non-linear intracavity dynamics. Here we introduce a conceptually new class of cyclic wave systems, characterized by non-uniform double-scale dynamics with strong periodic changes of the energy spectrum and slow evolution from cycle to cycle to a statistically steady state. Taking a practically important example—random fibre laser—we show that a model describing such a system is close to integrable non-linear Schrödinger equation and needs a new formalism of wave kinetics, developed here. We derive a non-linear kinetic theory of the laser spectrum, generalizing the seminal linear model of Schawlow and Townes. Experimental results agree with our theory. The work has implications for describing kinetics of cyclical systems beyond photonics.

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Profile of Coherent Vortices in Two-Dimensional Turbulence

2015 · ARTICLE · en

The inverse cascade of two-dimensional turbulence in a restricted domain leads to creating a coherent flow containing a number of system-size vortices. We examine the case of forcing turbulence with zero bottom friction where the final statistically steady state is determined by viscosity. We analytically establish structure of the coherent vortices in the state.

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Particle Dispersion in the Neutral Atmospheric Surface Layer

2015 · ARTICLE · en

We address theoretically the longstanding problem of particle dispersion in the lower atmosphere. The evolution of particle concentration under an absorbing boundary conditionatthegroundisdescribed.Wederiveaclose-formsolutionforthedownwindsurface density of deposited particles and find how the number of airborne particles decreases with time. The problem of the plume formation above the extended surface source is also solved analytically. At the end, we show how turbophoresis modifies the mean settling velocity of particles.

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Cascading of fluctuations in interdependent energy infrastuctures: Gas-grid coupling

2015 · ARTICLE · en

The revolution of hydraulic fracturing has dramatically increased the supply and lowered the cost of natural gas in the United States driving an expansion of natural gas-fired generation capacity in many electrical grids. Unrelated to the natural gas expansion, lower capital costs and renewable portfolio standards are driving an expansion of intermittent renewable generation capacity such as wind and photovoltaic generation. These two changes may potentially combine to create new threats to the reliability of these interdependent energy infrastructures. Natural gas-fired generators are often used to balance the fluctuating output of wind generation. However, the time-varying output of these generators results in time-varying natural gas burn rates that impact the pressure in interstate transmission pipelines. Fluctuating pressure impacts the reliability of natural gas deliveries to those same generators and the safety of pipeline operations. We adopt a partial differential equation model of natural gas pipelines and use this model to explore the effect of intermittent wind generation on the fluctuations of pressure in natural gas pipelines. The mean square pressure fluctuations are found to grow linearly in time with points of maximum deviation occurring at the locations of flow reversals.

DOI ↗ PDF ↗

Курсы (6)