Results 21 to 30 of about 3,764 (258)
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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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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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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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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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
openaire +4 more sources
Higher-order Knudsen's permeability correction model for rarefied gas in micro-scale channels
Natural Gas Industry B, 2019 Rarefaction effect appears when gas flows in micro/nano channels, so it is difficult to accurately predict real gas flow rate by using the classical theory.
Yinbin Lu
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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 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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The effect of system boundaries on the mean free path for confined gases
AIP Advances, 2013 The mean free path of rarefied gases is accurately determined using Molecular Dynamics simulations. The simulations are carried out on isothermal argon gas (Lennard-Jones fluid) over a range of rarefaction levels under various confinements (unbounded gas,
Sooraj K. Prabha +3 more
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Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source