A dusty gas model-direct simulation Monte Carlo algorithm to simulate flow in micro-porous media

A new efficient direct simulation Monte Carlo (DSMC) method is proposed for the simulation of microporous media based on the dusty gas model (DGM). Instead of simulating gas flow through a microporous medium with a complex geometry of micropores that mimics the physical pore morphology, the DGM-DSMC...

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Bibliographic Details
Published in:Physics of fluids (1994) 2019-06, Vol.31 (6)
Main Authors: Ahmadian, Mohammad Hassan, Roohi, Ehsan, Teymourtash, Alireza, Stefanov, Stefan
Format: Article
Language:English
Subjects:
Algorithms
Computer simulation
Direct simulation Monte Carlo method
Fluid dynamics
Gas flow
Mass flow rate
Mathematical morphology
Particle size
Permeability
Physics
Porosity
Porous media
Pressure gradients
Rarefaction
Simulation
Velocity distribution
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Summary:A new efficient direct simulation Monte Carlo (DSMC) method is proposed for the simulation of microporous media based on the dusty gas model (DGM). Instead of simulating gas flow through a microporous medium with a complex geometry of micropores that mimics the physical pore morphology, the DGM-DSMC method replaces it with the gas flow through a system of randomly distributed motionless virtual particles with simple spherical shapes confined in the considered domain. In addition, the interactions of gas molecules with the porous particles are simulated stochastically. For the aim of our study, the DGM is implemented in Bird’s two-dimensional DSMC code. The obtained results for the average velocity of gas flow through microscale porous media with given porosity are verified for different pressure gradients with those reported in the literature where porous particles are modeled physically in the domain. Thereafter, the effective parameters in porous media such as porosity, particle diameter, and rarefaction on flow behavior including velocity profile, apparent gas permeability, and mass flow rate are investigated. A comparison with the results predicted by the Open source Field Operation and Manipulation (OpenFOAM) software suggests that the employed DGM-DSMC is more accurate in highly porous media and its computational cost is considerably low.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.5094637