Results 21 to 30 of about 15,542 (295)
A mean free path approach to the micro/nanochannel gas flows
Advances in Aerodynamics, 2020 We investigate the gas flows near to solid surfaces in terms of the local spatial variation in the molecular mean free path (MFP). Molecular dynamics (MD) is the appropriate scientific tool for obtaining molecularly-accurate dynamic information in micro ...
Jianfei Xie
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Data-driven nonlinear constitutive relations for rarefied flow computations
Advances in Aerodynamics, 2021 To overcome the defects of traditional rarefied numerical methods such as the Direct Simulation Monte Carlo (DSMC) method and unified Boltzmann equation schemes and extend the covering range of macroscopic equations in high Knudsen number flows, data ...
Wenwen Zhao +3 more
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Micromachines, 2020 Temperature rise and elastic deformation are unavoidable issues occurring in high-speed gas microbearings due to the dominant small-scale fluid dynamics in rarefied gas flow applications.
Yao Wu, Lihua Yang, Tengfei Xu, Wei Wu
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A Well-Balanced Unified Gas-Kinetic Scheme for Multicomponent Flows under External Force Field
Entropy, 2022 The study of the evolution of the atmosphere requires careful consideration of multicomponent gaseous flows under gravity. The gas dynamics under an external force field is usually associated with an intrinsic multiscale nature due to large particle ...
Tianbai Xiao
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Thermal diffusion segregation of an impurity in a driven granular fluid
, 2014 We study segregation of an impurity in a driven granular fluid under two types of \emph{steady} states. In the first state, the granular gas is driven by a stochastic volume force field with a Fourier-type profile while in the second state, the granular ...
Garzó, Vicente, Reyes, Francisco Vega
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A continuum model of gas flows with localized density variations [PDF]
, 2008 We discuss the kinetic representation of gases and the derivation of macroscopic equations governing the thermomechanical behavior of a dilute gas viewed at the macroscopic level as a continuous medium.
Agarwal +28 more
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Study of reflection models of gas molecules on water adsorbed surfaces in high-speed flows
Journal of Fluid Science and Technology, 2020 We consider a Couette flow of a rarefied Ar gas with heat transfer between two wall surfaces and investigate the scattering behavior of gas molecules reflected either at a clean Pt surface or at a surface contaminated with adsorbates.
Naoya UENE +3 more
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Thermal Transpiration Flow: Molecular Dynamics Study from Dense to Dilute Gas
Fluids, 2023 Thermal transpiration flow, a flow from cold to hot, driven by a temperature gradient along a wall under a high Knudsen number condition, was studied using the molecular dynamics method with a two-dimensional channel consisting of infinite parallel ...
Hiroki Yamaguchi, Gota Kikugawa
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Liquid slip over gas nanofilms [PDF]
, 2017 We propose the rarefied-gas-cushion model (r-GCM), as an extended version of the gas-cushion model (GCM), to estimate the apparent slip of water flowing over a gas layer trapped at a solid surface.
Borg, Matthew +4 more
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AerospaceAccurate conjugate heat transfer (CHT) analysis is critical to the thermal management of hypersonic vehicles operating in rarefied environments, where non-equilibrium gas dynamics dominate.
Ziqu Cao, Chengyu Ma
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