Porous Medium Model: An Algebraic Perspective and the Fick’s Law

2021 ◽  
pp. 195-225
Author(s):  
Renato De Paula ◽  
Chiara Franceschini
Keyword(s):  
Porous Medium ◽  
Fick’S Law ◽  
Fick's Law ◽  
Medium Model ◽  
Porous Medium Model

A Porous Medium Model of Alveolar Gas Diffusion

1999 ◽  
Vol 2 (3) ◽  
pp. 263-275 ◽  
Author(s):  
Vladimir Koulich ◽  
Jose L. Lage ◽  
Connie C. W. Hsia ◽  
Robert L. Johnson, Jr.
Keyword(s):  
Porous Medium ◽  
Gas Diffusion ◽  
Medium Model ◽  
Porous Medium Model

scholarly journals CFD modelling of an animal occupied zone using an anisotropic porous medium model with velocity depended resistance parameters

2021 ◽  
Vol 181 ◽  
pp. 105950
Author(s):  
E. Moustapha Doumbia ◽  
David Janke ◽  
Qianying Yi ◽  
Thomas Amon ◽  
Martin Kriegel ◽  
...  
Keyword(s):  
Porous Medium ◽  
Cfd Modelling ◽  
Medium Model ◽  
Anisotropic Porous Medium ◽  
Porous Medium Model ◽  
Occupied Zone

CFD Simulation and Optimization of Gas-Solid Phase Temperature of Isothermal Acetylene Hydrogenation Reactor

2018 ◽  
Vol 16 (5) ◽  
Author(s):  
Guihua Hu ◽  
Zhencheng Ye ◽  
Wenli Du ◽  
Feng Qian
Keyword(s):  
Porous Medium ◽  
Solid Phase ◽  
Inlet Temperature ◽  
Acetylene Hydrogenation ◽  
Simulation And Optimization ◽  
Medium Model ◽  
Hydrogenation Reactor ◽  
Porous Medium Model ◽  
Two Temperature ◽  
Hydrogenation Selectivity

Abstract Gas-solid coupled heat transfer in an industrial isothermal acetylene hydrogenation reactor was carried out using computational fluid dynamics (CFD). A two-temperature porous medium model was established by adding source terms to energy equations of the solid and gas phases. The combination of a genetic algorithm with CFD methods is applied to optimization of the kinetic and process parameters of the reaction. The model was validated by comparing the simulated results with those obtained from a one-temperature porous medium model, a two-temperature porous medium model, and industrial data. The optimal hydrogen-to-acetylene ratio and inlet temperature are 1.78 and 326K, respectively. The optimized ethylene yield increase and hydrogenation selectivity are 0.53 % and 0.18 % higher than the values before optimization, respectively. Finally, the effects of the hydrogen-to-acetylene ratio and inlet temperature on the increase in ethylene yield and hydrogenation selectivity are analyzed. Therefore, the hydrogen-to-acetylene ratio and inlet temperature should be reasonably controlled during production.

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