Rarefied gas flow in functionalized microchannels. [PDF]
Sci Rep, 2023 AbstractThe interaction of rarefied gases with functionalized surfaces is of great importance in technical applications such as gas separation membranes and catalysis. To investigate the influence of functionalization and rarefaction on gas flow rate in a defined geometry, pressure-driven gas flow experiments with helium and carbon dioxide through ...
Kunze S +7 more
europepmc +7 more sources
Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle [PDF]
Micromachines, 2023 When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster.
Shurui Zhang +5 more
doaj +2 more sources
Molecular diameters of rarefied gases [PDF]
Scientific Reports, 2022 Molecular diameters are an important property of gases for numerous scientific and technical disciplines. Different measurement techniques for these diameters exist, each delivering a characteristic value.
S. Kunze +3 more
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Entropy, 2017 The numerical study of continuum-rarefied gas flows is of considerable interest because it can provide fundamental knowledge regarding flow physics. Recently, the nonlinear coupled constitutive method (NCCM) has been derived from the Boltzmann equation ...
Hong Xiao
exaly +3 more sources
Effects of Gas–Surface Interaction Conditions on the Performance of Knudsen Force-Based, Low-Pressure Micro Hydrogen Sensors [PDF]
MicromachinesKnudsen force phenomenon caused by non-uniform temperature fields in rarefied gas has been a topic of interest among researchers of gas sensing and structure actuating for micro-electromechanical systems (MEMS).
Yanli Wang +3 more
doaj +2 more sources
Analytical and numerical analysis of nonisothermal compressible rarefied gas flow between parallel plates [PDF]
Theoretical and Applied Mechanics, 2023 When dimensions of the flow domain become small, such as in the micro-electro-mechanical systems (MEMS) and nano-electro-mechanical systems (NEMS), rarefaction effects become more prominent.
Vulićević Petar V. +2 more
doaj +1 more source
The Half-Range Moment Method in Harmonically Oscillating Rarefied Gas Flows
Fluids, 2021 The formulation of the half-range moment method (HRMM), well defined in steady rarefied gas flows, is extended to linear oscillatory rarefied gas flows, driven by oscillating boundaries.
Giorgos Tatsios +2 more
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A Unified Framework for Modeling Continuum and Rarefied Gas Flows. [PDF]
Sci Rep, 2017 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.
Xiao H, Tang K.
europepmc +2 more sources
Molecular dynamics simulation on the splitting of shear flow in nanochannels
AIP Advances, 2021 With the vigorous development of micro-/nanoscience and micro-/nanotechnology, fluid flows at the micro-/nanoscale have become an important research field. The molecular dynamics simulations of Couette flow in a nanochannel are carried out in this paper.
Hang Yu, Zhengyu Tian, Fan Yang, Hua Li
doaj +1 more source
An open source, parallel DSMC code for rarefied gas flows in arbitrary geometries [PDF]
, 2010 This paper presents the results of validation of an open source Direct Simulation Monte Carlo (DSMC) code for general application to rarefied gas flows. The new DSMC code, called dsmcFoam, has been written within the framework of the open source C++ CFD ...
Reese, J. M. +11 more
core +1 more source