Two-Phase Flows with Solid Particles, Droplets, and Bubbles: Problems and Research Results (Review)

Varaksin, A. Yu.

doi:10.1134/s0018151x20040161

Cited by 26 publications

(5 citation statements)

References 117 publications

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“…The prototype engine chosen was the solid propellant rocket engine P-85, which belongs to the medium class of solid propellant boosters of the European Space Agency [22], i.e., the monoblock consists of a cylinder with length Znoz = 1060 cm, diameter equal to the diameter of the nozzle shear Dnoz = 215 cm and a conical head with an opening angle of 54 degrees. The condensed phase was neglected [23]. Figure 4 shows spatial distributions of the temperature and Mach number corresponding to the first point of the monoblock flight path.…”

Section: Some Results Of Calculations Of Gas-dynamic Parameters Of a ...mentioning

confidence: 99%

The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment

2022

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This paper considers the problem associated with the numerical simulation of the interaction between the cocurrent stream occurring near a monoblock moving in the gas medium and solid fuel combustion products flowing from a solid fuel rocket engine (SFRE). The peculiarity of the approach used is the description of gas-dynamic processes inside the combustion chamber, in the nozzle block, and the down jet based on a single calculation methodology. In the formulated numerical methodology, the calculation of gas-dynamic parameters is based on the solution of unsteady Navier–Stokes equations and the application of a hybrid computational grid. A hybrid block-structured computational grid makes it possible to calculate gas flow near bodies of complex geometric shapes. The simulation of the main phase of interaction, corresponding to the stationary mode of rocket flight in the Earth’s atmosphere, has been carried out. A conjugated simulation of the internal ballistics of SFRE and interaction of combustion products jets is conducted.

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Section: Some Results Of Calculations Of Gas-dynamic Parameters Of a ...mentioning

confidence: 99%

The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment

2022

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“…(1) aerodynamic drag force, (2) gravitational forces (Archimedes forces), (3) Safmans' force, (4) Magnus' force, (5) the force of thermophoresis, (6) the force of turbofreezing, (7) the force of diffusiophoresis, (8) centrifugal force, (9) electrostatic forces, and (10) wall power.…”

Section: Multiplicity Of Forces Acting On Particlesmentioning

confidence: 99%

Mathematical Modeling of Gas-Solid Two-Phase Flows: Problems, Achievements and Perspectives (A Review)

Varaksin

Ryzhkov

2023

Mathematics

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Mathematical modeling is the most important tool for constructing theories of different kinds of two-phase flows. This review is devoted to the analysis of the introduction of mathematical modeling to two-phase flows, where solid particles mainly serve as the dispersed phase. The main problems and features of the study of gas-solid two-phase flows are included. The main characteristics of gas flows with solid particles are discussed, and the classification of two-phase flows is developed based on these characteristics. The Lagrangian and Euler approaches to modeling the motion of a dispersed phase (particles) are described. A great deal of attention is paid to the consideration of numerical simulation methods that provide descriptions of turbulent gas flow at different hierarchical levels (RANS, LES, and DNS), different levels of description of interphase interactions (one-way coupling (OWC), two-way coupling (TWC), and four-way coupling (FWC)), and different levels of interface resolution (partial-point (PP) and particle-resolved (PR)). Examples of studies carried out on the basis of the identified approaches are excluded, and they are also excluded for the mathematical modeling of various classes of gas-solid two-phase flows.

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“…For defining of the empirical coefficient of interaction of particles with the fluid η there were performed the researches, which made possible to find out the dependence on the intensity of the average grain diameter of the particle d [18][19][20][21]. Approximation grouping together the viscous resistance coefficient and particle diameter becomes, (…”

Section: Modeling Process Of the Pollution Particle Motion In The Fluid Streammentioning

confidence: 99%

Research and Mathematic Simulation of the Pollution Particle Motion Process in the Fluid Stream under Effluents Treatment

Safarov

2021

E3S Web Conf.

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The article covers the issues of the mathematic simulation of the pollution particle motion process in the fluid stream, and there are defined the options influencing the process of the sweat. There are also analysed the challenging problems of the effluent water dispose. There is also devoted attention to the updating of the sedimentation process by the use of constrained features which exclude sediments in the objectionable points of the cleansing system and etc.

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Two-Phase Flows with Solid Particles, Droplets, and Bubbles: Problems and Research Results (Review)

Cited by 26 publications

References 117 publications

The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment

The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment

Mathematical Modeling of Gas-Solid Two-Phase Flows: Problems, Achievements and Perspectives (A Review)

Research and Mathematic Simulation of the Pollution Particle Motion Process in the Fluid Stream under Effluents Treatment

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