A5091644264- Field-Flow Fractionation Techniques
- Phase Equilibria and Thermodynamics
- Methane Hydrates and Related Phenomena
- Particle Dynamics in Fluid Flows
- Gas Dynamics and Kinetic Theory
- Cyclone Separators and Fluid Dynamics
- High-pressure geophysics and materials
- Catalytic Processes in Materials Science
- Advanced Thermodynamic Systems and Engines
- Mining and Gasification Technologies
- Heat transfer and supercritical fluids
- nanoparticles nucleation surface interactions
- Vehicle emissions and performance
- Material Properties and Applications
- Quantum, superfluid, helium dynamics
- Coal and Coke Industries Research
- Spacecraft and Cryogenic Technologies
- Gas Sensing Nanomaterials and Sensors
- Fluid Dynamics and Mixing
- Industrial Gas Emission Control
- Catalysts for Methane Reforming
- Combustion and Detonation Processes
- Adsorption, diffusion, and thermodynamic properties of materials
- Maritime Transport Emissions and Efficiency
- Chemical Thermodynamics and Molecular Structure
Al-Farabi Kazakh National University
2011-2024
Diffusion processes in gases play an important role many areas of Chemical Technology, aerodynamics, Astrophysics and Applied Physics. The study diffusion phenomena multicomponent gas mixtures at different pressures temperatures makes it possible to understand the mechanisms mass transfer between components their effect on final separation products. This is aimed describing features mixing during transition from molecular zone concentration gravitational convection. studying convective...
Abstract The possibility of intensifying the separation isothermal ternary gas mixtures containing carbon dioxide was studied experimentally. It shown that preferential transfer requires system to be initially diffusively unstable, and interdiffusion coefficients mixing components can either differ significantly from each other or close in value. A linear analysis stability for a flat vertical channel cylindrical finite height performed. Comparison results numerical study with experimental...
Both liquid and gaseous mixes have significant significance in numerous natural artificial processes. This elucidates the comprehensive examination of such systems a diverse array various applications. The presence several processes heat mass transfer gas mixtures without an interfacial boundary system causes emergence thermoconcentration gravitational fluxes, resulting density inhomogeneity medium. Isothermal diffusion helium methane stationary medium propane nitrous oxide ballast gases at...
The work discusses the influence of pressure and composition a ternary gas mixture on possibility occurrence convective instability under isothermal conditions due to differences in diffusion abilities components. change "diffusion – concentration gravitational convection" regimes mixtures CH4 + R12 Ar, N2 n-C4H10 was experimentally studied. It has been shown that systems study can occur at certain content component with highest molecular weight mixture. Its further increment initial leads...
Analysis of the experimental data for study mechanical equilibrium instability by diffusion mixing ternary gas mixtures in isothermal conditions is carried out within linear theory stability. A channel considered form a vertical cylindrical final height at boundary implying absence components’ transfer through walls. Predictions are compared with experimentally determined location stability borders mixture 0.4722 He + 0.5278 Ar – N2 variation different diameter channel. The existence...
Features of the change in "diffusion − gravitational concentration convection" regimes isothermal ternary gas mixtures were studied experimentally and numerically. It is shown that instability mechanical equilibrium leading to appearance structured convective formations arises at a certain pressure due difference diffusion coefficients components. The calculation results are compared with experimental data.
Features of the change in "diffusion − gravitational concentration convection" regimes isothermal ternary gas mixtures were studied experimentally and numerically. It is shown that instability mechanical equilibrium leading to appearance structured convective formations arises at a certain pressure due difference diffusion coefficients components. The calculation results are compared with experimental data.
Experimental study of the features separation process in ternary gas mixtures 0.6179 H2 + 0.3821 N2 – CH4 and 0.7760 0.2240 R12 n-C4H10 is conducted. Conditions priority transfer density heaviest component mixture are discussed. The problem solved by splitting scheme physical parameters. Numerical data on time evolution components concentrations at different initial obtained. Calculations have shown that for systems concentration increase results to intensity growth convective mixing.
Abstract Diffusion mixing in mixtures of C 3 H 8 + CO 2 - N O, Ne O , He CH 4 at different pressures has been studied experimentally. It found that a certain pressure the mixture there are convective flows distorting expected diffusion transfer. The transition parameters from to type can be determined terms stability theory. numerical results compared with experimental data.