Multiscale simulation of molecular gas flows by the general synthetic iterative scheme
Sign Up to like & getrecommendations! Published in 2021 at "Computer Methods in Applied Mechanics and Engineering"
DOI: 10.1016/j.cma.2020.113548
Abstract: Abstract The in-depth knowledge of rarefied gas dynamics is crucial to address challenges in a wide range of engineering problems, where gas flows are usually multiscale, i.e., covering a wide range of Knudsen numbers. As… read more here.
Keywords: gsis; molecular gas; gas flows; gas ... See more keywords
Gas-surface interaction effects on rarefied gas flows around microbeams induced by temperature fields
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Heat and Mass Transfer"
DOI: 10.1016/j.ijheatmasstransfer.2021.121186
Abstract: Abstract Without any initial pressure gradient, gas flows can be induced by temperature gradient and exert Knudsen (thermal) force on immersed structures. In order to investigate the influence of surface accommodation coefficients on rarefied gas… read more here.
Keywords: gas; induced temperature; surface; gas flows ... See more keywords
A Unified Framework for Modeling Continuum and Rarefied Gas Flows
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-13274-7
Abstract: The momentum and heat transport in rarefied gas flows is known to deviate from the classical laws of Navier and Fourier in Navier-Stokes-Fourier (NSF) equations. A more sophisticated Nonlinear Coupled Constitutive Model (NCCM) has been… read more here.
Keywords: framework; gas flows; continuum rarefied; rarefied gas ... See more keywords
Numerical Issues for Solving Eu-type Generalized Hydrodynamic Equations to Investigate Continuum-rarefied Gas Flows
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-018-36431-y
Abstract: Eu-type generalized hydrodynamic equations have been derived from the Boltzmann kinetic theory and applied to investigate continuum and/or rarefied gas flows. This short communication first reports detailed and important issues in the use of the… read more here.
Keywords: type generalized; generalized hydrodynamic; gas flows; hydrodynamic equations ... See more keywords
Entropic boundary conditions for 13 moment equations in rarefied gas flows
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5050529
Abstract: One of the major challenges in extending hydrodynamics to far from equilibrium gas flows comes with the need of new boundary conditions for any new modeling approach. The difficulty lies in finding an accurate set… read more here.
Keywords: system; moment equations; boundary conditions; equations rarefied ... See more keywords
Origin of spurious oscillations in lattice Boltzmann simulations of oscillatory noncontinuum gas flows.
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review E"
DOI: 10.1103/physreve.100.053317
Abstract: Oscillatory noncontinuum gas flows at the micro and nanoscales are characterized by two dimensionless groups: a dimensionless molecular length scale, the Knudsen number Kn, and a dimensionless frequency θ, relating the oscillatory frequency to the… read more here.
Keywords: gas flows; oscillatory noncontinuum; noncontinuum gas; spurious oscillations ... See more keywords
Supersonic Gas Flows in Radial Nozzles
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Mechanics and Technical Physics"
DOI: 10.1134/s0021894417060086
Abstract: Results of experimental investigations and numerical simulations of supersonic gas flows in radial nozzles with different nozzle widths are presented. It is demonstrated that different types of the flow are formed in the nozzle with… read more here.
Keywords: radial nozzles; supersonic gas; gas flows; gas ... See more keywords
Mathematical Simulation of Viscous Gas Flows between Two Coaxially Rotating Concentric Cylinders and Spheres
Sign Up to like & getrecommendations! Published in 2019 at "Computational Mathematics and Mathematical Physics"
DOI: 10.1134/s0965542519030023
Abstract: A technique for constructing conservative Godunov-type finite-difference schemes for computing viscous gas flows in cylindrical and spherical coordinates is described. Two- and three-dimensional flows in the gap between two coaxially rotating concentric cylinders and spheres… read more here.
Keywords: gas; two coaxially; coaxially rotating; rotating concentric ... See more keywords
Assessment of resistance of nasal continuous positive airway pressure interfaces
Sign Up to like & getrecommendations! Published in 2018 at "Archives of Disease in Childhood: Fetal and Neonatal Edition"
DOI: 10.1136/archdischild-2018-315838
Abstract: Objective To compare the resistance of interfaces used for the delivery of nasal continuous positive airway pressure (CPAP) in neonates, as measured by the generated system pressure at fixed gas flows, in an in vitro… read more here.
Keywords: airway pressure; nasal continuous; gas flows; resistance ... See more keywords
Effects of different fresh gas flows on carboxyhemoglobin levels: non-invasive carbon monoxide monitoring
Sign Up to like & getrecommendations! Published in 2022 at "Saudi Medical Journal"
DOI: 10.15537/smj.2022.43.8.20220424
Abstract: Objectives: To observe the effect of different fresh gas flows (FGF) on carboxyhemoglobin (COHb) levels non-invasively and continuously and to determine the contribution of the smoking status to intraoperative carbon monoxide (CO) accumulation and respiratory… read more here.
Keywords: cohb levels; gas flows; group; fresh gas ... See more keywords