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Pavel Kuibin

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Papers by Pavel Kuibin

Research paper thumbnail of On motion of a double helical vortex in a cylindrical tube

Fluid Mechanics and Its Applications, 2004

Research paper thumbnail of Modeling of vortex formation at the sharp edge of a semiinfinite plate

Research paper thumbnail of A study of the evolution of perturbations in the wake of a plate

The evolution of instability in the wake of a flat plate under the effect of specified external p... more The evolution of instability in the wake of a flat plate under the effect of specified external perturbations is investigated by the method of discrete vortex particles. Attention is given to the evolution of symmetric and antisymmetric modes as well as their interaction. It is found that resonance interactions of the subharmonic type, previously observed in mixing layer only, occur in the wake in addition to the usual nonlinear effects of instability evolution (formation of combination modes).

Research paper thumbnail of Derivation of equations of motion for discrete vortex particles in axisymmetric flows

A discrete vortex model is proposed for axisymmetric flows of an incompressible nonviscous fluid.... more A discrete vortex model is proposed for axisymmetric flows of an incompressible nonviscous fluid. First, a variational principle is formulated for a class of flows, and the vortex field is approximated by a discrete system of annular vortices. Equations of motion for this system are then derived using the variational principle. Under certain assumptions, equations used in some well-known vortex models are shown to follow from the equations obtained here. It is also shown that the proposed vortex model retains the principal properties of a continuum model, such as momentum and energy conservation.

Research paper thumbnail of Determination of the precession frequency of a helical vortex

Technical Physics Letters

Research paper thumbnail of A stationary vortex with varying helical symmetry

Research paper thumbnail of Description of convective heat transfer in a vortex tube

Research paper thumbnail of One-dimensional solutions for a flow with a helical symmetry

Thermophysics and Aeromechanics

Research paper thumbnail of Determination of frequency of helical vortex precession

Technical Physics Letters

ABSTRACT

Research paper thumbnail of The characteristics of swirl flows with helical symmetry

Technical Physics Letters

Research paper thumbnail of The Difference between the Integral Characteristics of Two and Three Water Droplets Moving Sequentially through High-Temperature Combustion Products and Air

MATEC Web of Conferences, 2015

This paper focuses on the study of macroscopic regularities that describe how moving droplets inf... more This paper focuses on the study of macroscopic regularities that describe how moving droplets influence on the evaporation of subsequent droplets in high-temperature gases (1100 K) and air at moderate temperatures (about 300 K). Experiments have been conducted by means of high-speed video recording and using specialized software. Investigations have been performed for two and three successive droplets with the initial radius of 1.5 mm. The effect of droplet braking, coagulation and acceleration has been defined. The typical difference between velocities, sizes and distances of successive droplets has been demonstrated.

Research paper thumbnail of Introduction to the theory of concentrated vortices

Research paper thumbnail of Theory of concentrated vortices. An introduction. Translated from the 2003 Rusian original

... I.1). f–vortex core The description of concentrated vortices summarized in a single book is .... more ... I.1). f–vortex core The description of concentrated vortices summarized in a single book is ... Thevortex filament (point vortex) is a simple and convenient model for describing real vortices. Moreover, this is a basis for developing mathematical models for more complex vortex flows ...

Research paper thumbnail of Kuibin Sharypov IUTAM

CITATIONS 0 READS 36 2 authors: Some of the authors of this publication are also working on these... more CITATIONS 0 READS 36 2 authors: Some of the authors of this publication are also working on these related projects: Development of the scientific basis for an enhancement of hydroturbine efficiency and safety View project Pavel Kuibin Russian Academy of Sciences 73 PUBLICATIONS 331 CITATIONS SEE PROFILE

Research paper thumbnail of Modeling of flow and convective energy separation in vortex tubes

A comprehensive analysis of flow induced in a tube by helical vortex filaments is presented. The ... more A comprehensive analysis of flow induced in a tube by helical vortex filaments is presented. The velocity field induced by helical vortex flow in a cylindrical tube is described analytically, and the effect of energy separation in a vortex tube is examined. The effect of convective transfer on the energy separation process is estimated.

Research paper thumbnail of Flame Shapes in Swirl Flow

Journal of Engineering Thermophysics

Research paper thumbnail of Spinning and normal combustion of a gas in a twisting flow

Technical Physics Letters

Research paper thumbnail of Flow of a fluid with a free surface over an inclinded cylinder

Research paper thumbnail of On the development of the method of vortex particles as applied to the description of detached flows

USSR Computational Mathematics and Mathematical Physics, 1989

ABSTRACT A variational method of constructing discrete vortex models is developed for describing ... more ABSTRACT A variational method of constructing discrete vortex models is developed for describing detached flows of an incompressible non-viscous fluid with a fixed point of detachment. Using the detached circumfluence of a semi-infinite plate as the example, the proposed model is compared with the well-known models. The results of a numerical experiment involving the study of an unstable vortex are presented.

Research paper thumbnail of 2D Flow Structure in a Thin Liquid Layer Under Thermal Wave Propagation

Microgravity Science and Technology, 2009

CITATION 1 READS 20 2 authors: Some of the authors of this publication are also working on these ... more CITATION 1 READS 20 2 authors: Some of the authors of this publication are also working on these related projects: Development of the scientific basis for an enhancement of hydroturbine efficiency and safety View project Oleg V Sharypov

Research paper thumbnail of On motion of a double helical vortex in a cylindrical tube

Fluid Mechanics and Its Applications, 2004

Research paper thumbnail of Modeling of vortex formation at the sharp edge of a semiinfinite plate

Research paper thumbnail of A study of the evolution of perturbations in the wake of a plate

The evolution of instability in the wake of a flat plate under the effect of specified external p... more The evolution of instability in the wake of a flat plate under the effect of specified external perturbations is investigated by the method of discrete vortex particles. Attention is given to the evolution of symmetric and antisymmetric modes as well as their interaction. It is found that resonance interactions of the subharmonic type, previously observed in mixing layer only, occur in the wake in addition to the usual nonlinear effects of instability evolution (formation of combination modes).

Research paper thumbnail of Derivation of equations of motion for discrete vortex particles in axisymmetric flows

A discrete vortex model is proposed for axisymmetric flows of an incompressible nonviscous fluid.... more A discrete vortex model is proposed for axisymmetric flows of an incompressible nonviscous fluid. First, a variational principle is formulated for a class of flows, and the vortex field is approximated by a discrete system of annular vortices. Equations of motion for this system are then derived using the variational principle. Under certain assumptions, equations used in some well-known vortex models are shown to follow from the equations obtained here. It is also shown that the proposed vortex model retains the principal properties of a continuum model, such as momentum and energy conservation.

Research paper thumbnail of Determination of the precession frequency of a helical vortex

Technical Physics Letters

Research paper thumbnail of A stationary vortex with varying helical symmetry

Research paper thumbnail of Description of convective heat transfer in a vortex tube

Research paper thumbnail of One-dimensional solutions for a flow with a helical symmetry

Thermophysics and Aeromechanics

Research paper thumbnail of Determination of frequency of helical vortex precession

Technical Physics Letters

ABSTRACT

Research paper thumbnail of The characteristics of swirl flows with helical symmetry

Technical Physics Letters

Research paper thumbnail of The Difference between the Integral Characteristics of Two and Three Water Droplets Moving Sequentially through High-Temperature Combustion Products and Air

MATEC Web of Conferences, 2015

This paper focuses on the study of macroscopic regularities that describe how moving droplets inf... more This paper focuses on the study of macroscopic regularities that describe how moving droplets influence on the evaporation of subsequent droplets in high-temperature gases (1100 K) and air at moderate temperatures (about 300 K). Experiments have been conducted by means of high-speed video recording and using specialized software. Investigations have been performed for two and three successive droplets with the initial radius of 1.5 mm. The effect of droplet braking, coagulation and acceleration has been defined. The typical difference between velocities, sizes and distances of successive droplets has been demonstrated.

Research paper thumbnail of Introduction to the theory of concentrated vortices

Research paper thumbnail of Theory of concentrated vortices. An introduction. Translated from the 2003 Rusian original

... I.1). f–vortex core The description of concentrated vortices summarized in a single book is .... more ... I.1). f–vortex core The description of concentrated vortices summarized in a single book is ... Thevortex filament (point vortex) is a simple and convenient model for describing real vortices. Moreover, this is a basis for developing mathematical models for more complex vortex flows ...

Research paper thumbnail of Kuibin Sharypov IUTAM

CITATIONS 0 READS 36 2 authors: Some of the authors of this publication are also working on these... more CITATIONS 0 READS 36 2 authors: Some of the authors of this publication are also working on these related projects: Development of the scientific basis for an enhancement of hydroturbine efficiency and safety View project Pavel Kuibin Russian Academy of Sciences 73 PUBLICATIONS 331 CITATIONS SEE PROFILE

Research paper thumbnail of Modeling of flow and convective energy separation in vortex tubes

A comprehensive analysis of flow induced in a tube by helical vortex filaments is presented. The ... more A comprehensive analysis of flow induced in a tube by helical vortex filaments is presented. The velocity field induced by helical vortex flow in a cylindrical tube is described analytically, and the effect of energy separation in a vortex tube is examined. The effect of convective transfer on the energy separation process is estimated.

Research paper thumbnail of Flame Shapes in Swirl Flow

Journal of Engineering Thermophysics

Research paper thumbnail of Spinning and normal combustion of a gas in a twisting flow

Technical Physics Letters

Research paper thumbnail of Flow of a fluid with a free surface over an inclinded cylinder

Research paper thumbnail of On the development of the method of vortex particles as applied to the description of detached flows

USSR Computational Mathematics and Mathematical Physics, 1989

ABSTRACT A variational method of constructing discrete vortex models is developed for describing ... more ABSTRACT A variational method of constructing discrete vortex models is developed for describing detached flows of an incompressible non-viscous fluid with a fixed point of detachment. Using the detached circumfluence of a semi-infinite plate as the example, the proposed model is compared with the well-known models. The results of a numerical experiment involving the study of an unstable vortex are presented.

Research paper thumbnail of 2D Flow Structure in a Thin Liquid Layer Under Thermal Wave Propagation

Microgravity Science and Technology, 2009

CITATION 1 READS 20 2 authors: Some of the authors of this publication are also working on these ... more CITATION 1 READS 20 2 authors: Some of the authors of this publication are also working on these related projects: Development of the scientific basis for an enhancement of hydroturbine efficiency and safety View project Oleg V Sharypov

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