Results 21 to 30 of about 17,567 (301)
Experimental Study on Gas Flow in a Rough Microchannel
Frontiers in Energy Research, 2022 The shape and relative roughness of a rough surface have an important influence on microscale flow and heat transfer. In this study, a rectangular silicon microchannel (0.8 mm width and 11.9 μm height) with a large width-depth ratio is fabricated by the ...
Deming Li +6 more
doaj +1 more source
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
doaj +1 more source
Aerodynamic optimization of NACA 0012 airfoils with attached Gurney flap in the rarefied gas flow
AIP Advances, 2023 The aerodynamic optimization of a Gurney flap attached to the NACA 0012 airfoil in rarefied gas flow is studied in this study. In order to investigate the effects of Gurney flap geometry (height, mounting angle, and mounting location) and angle of attack
Keren Lin +4 more
doaj +1 more source
Energies, 2023 In this study, we first considered the influence of micro-nozzle wall roughness structure on molecular collision and reflection behavior and established a modified CLL model.
Xuhui Liu +4 more
doaj +1 more source
Liquid slip over gas nanofilms [PDF]
, 2017 We propose the rarefied-gas-cushion model (r-GCM), as an extended version of the gas-cushion model (GCM), to estimate the apparent slip of water flowing over a gas layer trapped at a solid surface.
Borg, Matthew +4 more
core +3 more sources
Highly rarefied gas flows in rough channels of finite length
Advances in Aerodynamics, 2023 Highly rarefied gas flows through a rough channel of finite length with small bumps appended to its surfaces are investigated, by varying the accommodation coefficient $$\alpha$$ α in Maxwell’s diffuse-specular boundary condition, the characteristic size
Zheng Shi, Yulong Zhao, Wei Su, Lei Wu
doaj +1 more source
Gas flow in near surface comet like porous structures: Application to 67P/Churyumov-Gerasimenko [PDF]
, 2018 We performed an investigation of a comet like porous surface to study how sub-surface sublimation with subsequent flow through the porous medium can lead to higher gas temperatures at the surface.
Christou, Chariton +8 more
core +5 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
doaj +1 more source
Micromachines, 2023 The direct simulation Monte Carlo (DSMC) method, which is a probabilistic particle-based gas kinetic simulation approach, is employed in the present work to describe the physics of rarefied gas flow in super nanoporous materials (also known as mesoporous)
Vahid Shariati +2 more
doaj +1 more source
Measurement of the heat transfer coefficient in gas spray cooling with low liquid flow rate [PDF]
E3S Web of Conferences, 2023 The rapid development of high power electronic, energy systems has led us to the fact that the performance of these systems is limited by their cooling capacity. Spray cooling is one of the most effective methods for cooling heated surfaces.
Sibiryakov Nikolay +2 more
doaj +1 more source