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Advanced Problems in Fluid Mechanics

Submission Deadline: 31 March 2024 (closed) Submit to Special Issue

Guest Editors

Prof. T.P. Lyubimova, Institute of Continuous Media Mechanics Ural Branch of Russian Academy of Sciences, Russia.
Doctor of Science in Physics and Mathematics, Professor, Honored Scientist of the Russian Federation, Head of the Computational Fluid Dynamics Laboratory of the Institute of Continuous Media Mechanics of the Russian Academy of Sciences, Professor at the Theoretical Physics Department of Perm State University. Scientific interests are in the field of hydrodynamic stability, multiphase flows, computational fluid dynamics. According to Scopus, she has 307 papers, 2712 citations, H-index 24. Over the last 3 years, 50 papers have been published in Journals included in the Scopus database.

Summary

This issue is devoted to the advanced problems in Fluid Mechanics and their applications to material science and technology. The scope includes and not limited by the following directions:

· Hydrodynamic stability and transition to turbulence

· Multiphase flows

· Interfacial fluid dynamics

· Convective heat and mass transfer

· Flows in microchannels

· Flows in porous media

· Flows in fluids with complex rheology

· Acoustic and wave processes in heterogeneous media

· Control of flows by vibration and rotation

· Flows in biological systems

· Environmental flows and their applications to technological and environmental processes. Original research papers and reviews are welcome.

Keywords

Hydrodynamic stability, Multiphase flows, Interfacial Flows, Porous Media, Heat/Mass Transfer, Complex Fluids, Flows in Microchannels, Biological flows, Acoustic and Wave Processes, Environmental flows

Published Papers

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Open Access

ARTICLE

On the Features of Thermal Convection in a Compressible Gas
Igor B. Palymskiy
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2024.048829
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract The fully nonlinear equations of gas dynamics are solved in the framework of a numerical approach in order to study the stability of the steady mode of Rayleigh-Bénard convection in compressible, viscous and heat-conducting gases encapsulated in containers with no-slip boundaries and isothermal top and bottom walls. An initial linear temperature profile is assumed. A map of the possible convective modes is presented assuming the height of the region and the value of the temperature gradient as influential parameters. For a relatively small height, isobaric convection is found to take place, which is taken over by an adiabatic mode when… More >

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ARTICLE

Numerical Simulation of Thermocapillary Convection with Evaporation Induced by Boundary Heating
O. N. Goncharova, V. B. Bekezhanova
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2024.047959
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract The dynamics of a bilayer system filling a rectangular cuvette subjected to external heating is studied. The influence of two types of thermal exposure on the flow pattern and on the dynamic contact angle is analyzed. In particular, the cases of local heating from below and distributed thermal load from the lateral walls are considered. The simulation is carried out within the frame of a two-sided evaporative convection model based on the Boussinesq approximation. A benzine–air system is considered as reference system. The variation in time of the contact angle is described for both heating modes. Under lateral heating, near-wall… More >
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ARTICLE

Phase Transition in a Dense Swarm of Self-Propelled Bots
Dmitry Bratsun, Kirill Kostarev
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2024.048206
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract
Swarms of self-organizing bots are becoming important elements in various technical systems, which include the control of bacterial cyborgs in biomedical applications, technologies for creating new metamaterials with internal structure, self-assembly processes of complex supramolecular structures in disordered media, etc. In this work, we theoretically study the effect of sudden fluidization of a dense group of bots, each of which is a source of heat and follows a simple algorithm to move in the direction of the gradient of the global temperature field. We show that, under certain conditions, an aggregate of self-propelled bots can fluidize, which leads to a… More >
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ARTICLE

Applying the Shearlet-Based Complexity Measure for Analyzing Mass Transfer in Continuous-Flow Microchannels
Elena Mosheva, Ivan Krasnyakov
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2024.049146
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract Continuous-flow microchannels are widely employed for synthesizing various materials, including nanoparticles, polymers, and metal-organic frameworks (MOFs), to name a few. Microsystem technology allows precise control over reaction parameters, resulting in purer, more uniform, and structurally stable products due to more effective mass transfer manipulation. However, continuous-flow synthesis processes may be accompanied by the emergence of spatial convective structures initiating convective flows. On the one hand, convection can accelerate reactions by intensifying mass transfer. On the other hand, it may lead to non-uniformity in the final product or defects, especially in MOF microcrystal synthesis. The ability to distinguish regions of convective… More >

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ARTICLE

Numerical Analysis of Permeability of Functionally Graded Scaffolds
Dmitry Bratsun, Natalia Elenskaya, Ramil Siraev, Mikhail Tashkinov
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2024.047928
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract In this work, we numerically study the hydrodynamic permeability of new-generation artificial porous materials used as scaffolds for cell growth in a perfusion bioreactor. We consider two popular solid matrix designs based on triply periodic minimal surfaces, the Schwarz P (primitive) and D (diamond) surfaces, which enable the creation of materials with controlled porosity gradients. The latter property is crucial for regulating the shear stress field in the pores of the scaffold, which makes it possible to control the intensity of cell growth. The permeability of functionally graded materials is studied within the framework of both a microscopic approach based… More >
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ARTICLE

Linear and Non-Linear Dynamics of Inertial Waves in a Rotating Cylinder with Antiparallel Inclined Ends
Mariya Shiryaeva, Mariya Subbotina, Stanislav Subbotin
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.4, pp. 787-802, 2024, DOI:10.32604/fdmp.2024.048165
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract This work is devoted to the experimental study of inertial wave regimes in a non-uniform rotating cylinder with antiparallel inclined ends. In this setting, the cross-section of the cylinder is divided into two regions where the fluid depth increases or decreases with radius. Three different regimes are found: inertial wave attractor, global oscillations (the cavity’s resonant modes) and regime of symmetric reflection of wave beams. In linear wave regimes, a steady single vortex elongated along the rotation axis is generated. The location of the wave’s interaction with the sloping ends determines the vortex position and the vorticity sign. In non-linear… More >

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ARTICLE

Formation of Water Quality of Surface Water Bodies Used in the Material Processing
Tatyana Lyubimova, Anatoly Lepikhin, Yanina Parshakova, Irina Zayakina, Alibek Issakhov
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.4, pp. 815-828, 2024, DOI:10.32604/fdmp.2024.048463
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract In the process of production or processing of materials by various methods, there is a need for a large volume of water of the required quality. Today in many regions of the world, there is an acute problem of providing industry with water of a required quality. Its solution is an urgent and difficult task. The water quality of surface water bodies is formed by a combination of a large number of both natural and anthropogenic factors, and is often significantly heterogeneous not only in the water area, but also in depth. As a rule, the water supply of large… More >

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ARTICLE

Averaged Dynamics of Fluids near the Oscillating Interface in a Hele-Shaw Cell
Anastasia Bushueva, Olga Vlasova, Denis Polezhaev
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.4, pp. 847-857, 2024, DOI:10.32604/fdmp.2024.048271
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract The steady flow in a Hele-Shaw cell filled with fluids with a high viscosity contrast in the presence of fluid oscillations is experimentally studied. The control of oscillatory dynamics of multiphase systems with interfaces is a challenging technological problem. We consider miscible (water and glycerol) and immiscible (water and high-viscosity silicone oil PMS-1000) fluids under subsonic oscillations perpendicular to the interface. Observations show that the interface shape depends on the amplitude and frequency of oscillations. The interface is undisturbed only in the absence of oscillations. Under small amplitudes, the interface between water and glycerol widens due to mixing. When the… More >

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ARTICLE

Dynamics of Low-Viscosity Liquids Interface in an Unevenly Rotating Vertical Layer
Victor Kozlov, Vladimir Saidakov, Nikolai Kozlov
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.4, pp. 693-703, 2024, DOI:10.32604/fdmp.2024.048068
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract The behavior of two immiscible low-viscosity liquids differing in density and viscosity in a vertical flat layer undergoing modulated rotation is experimentally studied. The layer has a circular axisymmetric boundary. In the absence of modulation of the rotation speed, the interphase boundary has the shape of a short axisymmetric cylinder. A new effect has been discovered, under the influence of rotation speed modulation, the interface takes on a new dynamic equilibrium state. A more viscous liquid covers the end boundaries of the layer in the form of thin films, which have the shape of round spots of almost constant radius;… More >

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Influence of Bottom Inclination on the Flow Structure in a Rotating Convective Layer
Andrei Vasiliev, Andrei Sukhanovskii, Elena Popova
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.4, pp. 739-748, 2024, DOI:10.32604/fdmp.2024.048092
（This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)
Abstract The formation of convective flows in a rotating cylindrical layer with an inclined bottom and free surface is studied. Convection is driven by localized cooling at the center of the upper free surface and by rim heating at the bottom near the sidewall. The horizontal temperature difference in a rotating layer leads to the formation of a convective flow with a complex structure. The mean meridional circulation, consisting of three cells, provides a strongly non-uniform differential rotation. As a result of the instability of the main cyclonic zonal flow, the train of baroclinic waves appears in the upper layer. The… More >

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Advanced Problems in Fluid Mechanics

Guest Editors

Summary

Keywords

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