Direct Simulation Monte Carlo Analysis of Gas Transport in Microporous Structure Based on X-ray Computed Tomography

2013 ◽  
Vol 58 (1) ◽  
pp. 71-78 ◽  
Author(s):  
I. Kinefuchi ◽  
J. Oyama ◽  
K. Yokoyama ◽  
N. Kubo ◽  
T. Tokumasu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Monte Carlo ◽  
Gas Transport ◽  
Direct Simulation Monte Carlo ◽  
Monte Carlo Analysis ◽  
Direct Simulation ◽  
Microporous Structure ◽  
X Ray ◽  
X Ray Computed ◽  
Simulation Monte Carlo

scholarly journals Direct Simulation Monte Carlo investigation of fluid characteristics and gas transport in porous microchannels

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Vahid Shariati ◽  
Mohammad Hassan Ahmadian ◽  
Ehsan Roohi
Keyword(s):  
Monte Carlo ◽  
Gas Transport ◽  
Gas Permeability ◽  
Knudsen Diffusion ◽  
Direct Simulation Monte Carlo ◽  
Current Data ◽  
Direct Simulation ◽  
Apparent Permeability ◽  
Knudsen Numbers ◽  
Simulation Monte Carlo

AbstractThe impetus of the current research is to use the direct simulation Monte Carlo (DSMC) algorithm to investigate fluid behaviour and gas transport in porous microchannels. Here, we demonstrate DSMC’s capability to simulate porous media up to 40% porosity. In this study, the porous geometry is generated by a random distribution of circular obstacles through the microchannel with no interpenetration between the obstacles. The influence of the morphology along with rarefaction and gas type on the apparent permeability is investigated. Moreover, the effects of porosity, solid particle’s diameter and specific surface area are considered. Our results demonstrate that although decreasing porosity intensifies tortuosity in the flow field, the tortuosity reduces at higher Knudsen numbers due to slip flow at solid boundaries. In addition, our study on two different gas species showed that the gas type affects slippage and apparent gas permeability. Finally, comparing different apparent permeability models showed that Beskok and Karniadakis model is valid only up to the early transition regime and at higher Knudsen numbers, the current data matches those models that take Knudsen diffusion into account as well.

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