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
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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
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Molecular free path distribution in rarefied gases [PDF]
, 2011 We present the results of investigations into the distribution of molecular free paths in rarefied gases using molecular dynamics simulations. Our tests on a range of different gas densities and confinements (unbounded, single bounding wall and parallel ...
Dongari, Nishanth +2 more
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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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On deterministic approximation of the Boltzmann equation in a bounded domain [PDF]
, 2011 In this paper we present a fully deterministic method for the numerical solution to the Boltzmann equation of rarefied gas dynamics in a bounded domain for multi-scale problems.
Filbet, Francis
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Rarefied gas flow through a slit.
SHINKU, 1990 A rarefied gas flow through a slit in an infinite plane wall, induced by a small pressure difference across the slit, is studied on the basis of the kinetic theory. The system of integral equations for the macroscopic variables (the velocity, density, and temperature of the gas), derived from the linearized Boltzmann–Krook–Welander equation with the ...
Hasegawa, Manabu, Sone, Yoshio
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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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A topology optimization method for rarefied gas flows
Nihon Kikai Gakkai ronbunshu, 2017 We construct a topology optimization method for two dimensional rarefied gas flow problems, based on level-set boundary expressions. The degree of rarefaction is expressed by the Knudsen number, which is the ratio of the mean free path and the ...
Ayami SATO +4 more
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Rarefied gas flows through meshes and implications for atmospheric measurements [PDF]
Annales Geophysicae, 2001 Meshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method,
J. Gumbel
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Rarefied gas dynamics and its applications to vacuum technology [PDF]
, 2007 Basic concepts of rarefied gas dynamics are given in a concise form. Some problems of rarefied gas flows are considered, namely, calculations of velocity slip and temperature jump coefficients, gas flow through a tube due to pressure and temperature ...
Sharipov, F
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