Results 21 to 30 of about 1,965,165 (272)
Understanding of Thermal Conductance of Thin Gas Layers
Advances in Mechanical Engineering, 2013 We studied heat conductions in a thin gas layer at micro- and nanoscales between two straight walls by atomistic modeling. Since the Knudsen number is high while the gas may be not really rarefied, we use the generalized Enskog-Monte-Carlo method (GEMC ...
Xiaodong Shan, Moran Wang
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A Discrete-Ordinates Solution for the Strong Evaporation Problem in Rarefied Gas Dynamics
Trends in Computational and Applied Mathematics, 2021 In this work we solve the nonlinear strong evaporation problem in rarefied gas dynamics. The analysis is based on the BGK model, with three dimensional velocity vector, derived from the Boltzmann equation. We present the complete development of a closed
C. S. Scherer
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Acceleration Waves in Rational Extended Thermodynamics of Rarefied Monatomic Gases
Fluids, 2020 Rational Extended Thermodynamics theories with different number of moments are usually introduced to study non-equilibrium phenomena in rarefied gases. Here, we use them to describe one-dimensional acceleration waves in a rarefied monatomic gas.
Francesca Brini, Leonardo Seccia
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EFFECT OF VISCOUS HEAT GENERATION ON TEMPERATURE OF RAREFIED GAS MICROFLOWS DRIVEN BY MOVING SURFACE [PDF]
Journal of Engineering Science and Technology, 2018 Good understanding of the gas flow under rarefied conditions is important for designing the micro-electro-mechanical systems. The Navier-Stokes-Fourier equations with the slip and jump conditions can capture the rarefied gas flows in the slip regime.
NAM T. P. LE, THOAI N. TRAN
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Detection of ammonia gas by Knudsen thermal force in micro gas actuator
Case Studies in Thermal Engineering, 2018 Direct Simulation Monte Carlo (DSMC) method is applied to evaluate the performance of a new micro gas sensor (MIKRA) for mass analysis of ammonia in the rarefied gas.
Ahmadreza Mahyari +3 more
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Multifluid description of rarefied gas mixture flows
Journal of Thermal Engineering, 2020 In the present contribution attention is focused to extend the application of multifluid descriptions to rarefied conditions for the first time . To this aim, a multifluid Maxwell model and a multifluid Smoluchowski model are proposed for near wall ...
Iman ZAHMATKESH +2 more
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Rarefied Poiseuille Flow in a Circular Tube [PDF]
EPJ Web of Conferences, 2019 An isothermal rarefied gas flow through a long circular tube due to longitudinal pressure gradient (a three-dimensional Poiseuille problem) was studied using the linearized Bhatnagar-Gross-Krook model kinetic equation over the whole range of the Knudsen ...
Germider Oksana, Popov Vasily
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AIP Advances, 2020 Rarefied gas flow has received wide attention due to the booming of micro/nano-electromechanical systems and aerospace engineering. Under such rarefied conditions, the frequency of intermolecular collisions is sharply reduced, so the impacts of ...
Hang Yu, Ye Zhang, Fan Yang, Hua Li
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Авіаційно-космічна техніка та технологія, 2022 This article presents the structure of designing and modeling the flow of rotors and pusher propellers in a highly rarefied atmosphere. The aerodynamic characteristics of an airfoil are key factors in determining design accuracy and performance ...
Mykola Kulyk +4 more
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DSMC–LBM mapping scheme for rarefied and non-rarefied gas flows [PDF]
Journal of Computational Science, 2016 We present the formulation of a kinetic mapping scheme between the Direct Simulation Monte Carlo (DSMC) and the Lattice Boltzmann Method (LBM) which is at the basis of the hybrid model used to couple the two methods in view of efficiently and accurately simulate isothermal flows characterized by variable rarefaction effects. Owing to the kinetic nature
Gianluca Di Staso +3 more
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