Physical model of porous medium with controlled permeability based on PDMS

2016 ◽  
Vol 11 (1) ◽  
pp. 94-99
Author(s):  
S.P. Sametov
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Physical Model ◽  
Relative Permeability ◽  
Medium Model ◽  
Wide Range ◽  
Permeability For Water ◽  
Porous Medium Model

For filtration studies in a wide range of permeability a model of porous medium was used a porous cross-linked polymer polydimethylsiloxane. Its permeability and porosity is well-controlled in a range of 0.1–30 000 mD. In the work several samples of porous media with various permeability are presented. Obtained minimal relative permeability for water is order of 1 mD in the porous medium model.

Analysis of static sealing rules of foamed silicone rubber based on a porous media model

2019 ◽  
Vol 39 (3) ◽  
pp. 101-116
Author(s):  
Tianzheng Wen ◽  
Fei Guo ◽  
Yijie Huang ◽  
Shixing Zhu ◽  
Xiaohong Jia
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Contact Pressure ◽  
Silicone Rubber ◽  
Cell Structure ◽  
Cell Contact ◽  
Relative Pressure ◽  
Medium Model ◽  
Porous Media Model ◽  
Porous Medium Model

We established a method for calculating and analyzing the static leakage rate based on a porous media model for foamed silicone rubber materials. The mechanical properties of the foamed silicone rubber material under macroscopic compression were described by the Ogden third (foam) model in the finite-element hyperelastic model. It solved the problem of difficult convergence of large compressible and volume compressible cell materials. The size and distribution of the cells on the surface of the foamed material were obtained by a white-light interferometer and mathematical fitting. The boundary conditions for solving the porous medium model were obtained by the coupling of the macroscopic contact pressure and the microscopic cell contact pressure. For the unique cell structure and contact state of the surface of the foamed material, the flow state of the fluid at the sealing interface was described by a porous medium model, and the leak rate was obtained. In addition, this article analyzed the effect of different compression and the relative pressure of the sealing end face on the leakage.

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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