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Modeling of gas transport in porous medium: Stochastic simulation of the Knudsen gas and a kinetic model with homogeneous scatterer
- Source :
- Physics of Fluids. 32(10)
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- Mass transport of the Knudsen gas in a porous medium is investigated on the basis of the kinetic theory of gases. First, the mass flow conductance is computed numerically for various porosities and solid grain sizes by stochastic particle simulations (SPS). Then, a kinetic model with a homogeneous scatterer is introduced, which contains the reference Knudsen number as the sole parameter that characterizes the collision frequency of gas molecules with the micro-structural solid surface. With the aid of the standard asymptotic analyses for small and large Knudsen numbers combined with the percolation theory, the effective reference Knudsen number is identified to reproduce the SPS results for a wide range of porosities.<br />This paper is part of the Special Topic, Advances in Micro/Nano Fluid Flows: In Memory of Prof. Jason Reese.
- Subjects :
- Fluid Flow and Transfer Processes
Physics
Range (particle radiation)
Mechanical Engineering
Mass flow
Computational Mechanics
Mechanics
Condensed Matter Physics
01 natural sciences
010305 fluids & plasmas
Physics::Fluid Dynamics
Percolation theory
Collision frequency
Mechanics of Materials
0103 physical sciences
Kinetic theory of gases
Particle
Knudsen number
010306 general physics
Porous medium
Subjects
Details
- Language :
- English
- ISSN :
- 10706631
- Volume :
- 32
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Physics of Fluids
- Accession number :
- edsair.doi.dedup.....576fe064cc9205cc4ea2af19451c1ed9