The article provides an extensive commentary of V. Khlebnikov’s poem Easter in Ansali [Paskha v E... more The article provides an extensive commentary of V. Khlebnikov’s poem Easter in Ansali [Paskha v Enzeli ]. The author discovers and analyses two major plotlines: a documentary (or autobiographical) one and a Stepan Razin-inspired one, both developed in parallel to each other in terms of the metaphors chosen for the poem. The documentary level is concerned with Khlebnikov’s visit to Persia, on board of the steamboat Kursk (hence the poem’s numerous mentions of kursky, korskoye), while the covert, Razin-related level transpires as a memory of the captive Persian girl: in 1669, Razin’s fleet defeated the Persians, and took various spoils, including, as legend has it, a daughter of the commander of the Shakh’s fleet. It is this girl who is mentioned in the folk song ‘From beyond the island towards the river’s widest flow’ [‘Iz-za ostrova na strezhen’], quoted in Khlebnikov’s poem. By bringing together the poem’s two levels through a commentary about several memorable metaphors (like ‘the Zorgam gorge’, ‘the dark unruly hair’, as well as comparing Razin to a nightingale), the author reveals that the lyrical hero identifies himself with Razin, who appears as the former’s lyrical doppelganger as well as the poet’s alter ego.
The development and application of numerical models to the simulation of coupled CFD problems has... more The development and application of numerical models to the simulation of coupled CFD problems has been the focus of research in various areas of science and engineering since the first decade of the 21st century [...]
This work focuses on three-dimensional simulation of the dynamics of droplets with contact-angle ... more This work focuses on three-dimensional simulation of the dynamics of droplets with contact-angle hysteresis. In order to consistently model the dynamics of the contact line, a combination of the linear molecular kinetic theory and the hydrodynamic theory is implemented in the present numerical method. Without presetting the contact line and/or the contact angle, such simulations are generally prone to irregularities at the contact line, which are mainly due to the imposition of the pinning and unpinning mechanisms associated with the hysteresis phenomenon. An effective treatment for this issue is proposed based on a simple procedure for calculating the nodal contact angle within the framework of enriched finite element/level set method. The resulting method also benefits from a manipulated momentum conservation equation that incorporates the effect of the liquid mass conservation correction, which is essentially important for simulations with a rather long (physical) run-time. In th...
In this work, a numerical model for the simulation of two-phase electrohydrodynamic (EHD) problem... more In this work, a numerical model for the simulation of two-phase electrohydrodynamic (EHD) problems is proposed. It is characterized by a physically consistent treatment of surface tension as well as a jump in the electric material properties. The formulation is based on a finite element method enriched with special shape functions, capable of accurate capturing discontinuities both in the fluid pressure and the gradient of the electric potential. Phase interface is, thus, represented as a zero-thickness boundary. The proposed methodology allows modeling the electric force as an interfacial one, strictly abiding with the physics. The approach is tested using the droplet deformation benchmarks. Moreover, application of the method to study a three-dimensional (3D) case, not characterized by symmetry of revolution, is shown. The proposed methodology defines a basis for an enriched finite element method for a wide range of EHD problems.
The article provides an extensive commentary of V. Khlebnikov’s poem Easter in Ansali [Paskha v E... more The article provides an extensive commentary of V. Khlebnikov’s poem Easter in Ansali [Paskha v Enzeli ]. The author discovers and analyses two major plotlines: a documentary (or autobiographical) one and a Stepan Razin-inspired one, both developed in parallel to each other in terms of the metaphors chosen for the poem. The documentary level is concerned with Khlebnikov’s visit to Persia, on board of the steamboat Kursk (hence the poem’s numerous mentions of kursky, korskoye), while the covert, Razin-related level transpires as a memory of the captive Persian girl: in 1669, Razin’s fleet defeated the Persians, and took various spoils, including, as legend has it, a daughter of the commander of the Shakh’s fleet. It is this girl who is mentioned in the folk song ‘From beyond the island towards the river’s widest flow’ [‘Iz-za ostrova na strezhen’], quoted in Khlebnikov’s poem. By bringing together the poem’s two levels through a commentary about several memorable metaphors (like ‘the Zorgam gorge’, ‘the dark unruly hair’, as well as comparing Razin to a nightingale), the author reveals that the lyrical hero identifies himself with Razin, who appears as the former’s lyrical doppelganger as well as the poet’s alter ego.
The development and application of numerical models to the simulation of coupled CFD problems has... more The development and application of numerical models to the simulation of coupled CFD problems has been the focus of research in various areas of science and engineering since the first decade of the 21st century [...]
This work focuses on three-dimensional simulation of the dynamics of droplets with contact-angle ... more This work focuses on three-dimensional simulation of the dynamics of droplets with contact-angle hysteresis. In order to consistently model the dynamics of the contact line, a combination of the linear molecular kinetic theory and the hydrodynamic theory is implemented in the present numerical method. Without presetting the contact line and/or the contact angle, such simulations are generally prone to irregularities at the contact line, which are mainly due to the imposition of the pinning and unpinning mechanisms associated with the hysteresis phenomenon. An effective treatment for this issue is proposed based on a simple procedure for calculating the nodal contact angle within the framework of enriched finite element/level set method. The resulting method also benefits from a manipulated momentum conservation equation that incorporates the effect of the liquid mass conservation correction, which is essentially important for simulations with a rather long (physical) run-time. In th...
In this work, a numerical model for the simulation of two-phase electrohydrodynamic (EHD) problem... more In this work, a numerical model for the simulation of two-phase electrohydrodynamic (EHD) problems is proposed. It is characterized by a physically consistent treatment of surface tension as well as a jump in the electric material properties. The formulation is based on a finite element method enriched with special shape functions, capable of accurate capturing discontinuities both in the fluid pressure and the gradient of the electric potential. Phase interface is, thus, represented as a zero-thickness boundary. The proposed methodology allows modeling the electric force as an interfacial one, strictly abiding with the physics. The approach is tested using the droplet deformation benchmarks. Moreover, application of the method to study a three-dimensional (3D) case, not characterized by symmetry of revolution, is shown. The proposed methodology defines a basis for an enriched finite element method for a wide range of EHD problems.
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Papers by Pavel Ryzhakov