Results 21 to 30 of about 2,707 (305)
Effect of Different Surface Microstructures in the Thermally Induced Self-Propulsion Phenomenon
Micromachines, 2022 In micro/nano-scale systems where the characteristic length is in the order of or less than the mean free path for gas molecules, an object placed close to a heated substrate with a surface microstructure receives a propulsive force.
Clint John Cortes Otic, Shigeru Yonemura
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Kongqi donglixue xuebaoRarefied gas dynamics serves as an essential bridge connecting molecular-scale motion to macroscopic fluid transport behavior, with broad applications in spacecraft re-entry flight, hypersonic aerodynamics, and micro/nano-scale transport.
Zhongzheng Jiang +7 more
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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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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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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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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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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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