Influence of pore-network microstructure on the isothermal-drying performance of porous media

Xu, Zhenyu1; Pillai, Krishna M.2

2021-12-01

10.1080/07373937.2021.2012786

DRYING TECHNOLOGY   影响因子和分区

0737-3937

1532-2300

Numerical experiments were conducted to investigate the influence of pore-level microstructure on the drying performance of porous media using pore network (P-N) models. The drying simulation based on the invasion-percolation (I-P) algorithm included the film effect, however the interaction with the outside flow-field was simplified using a constant-concentration vapor-diffusion layer. Three groups of experiments with progressive relationships are designed starting from some general rules learned from previous research, such as: (1) increasing the opening area; (2) making the big-throats penetrate into the inside of a pore network to form good transportation routes. Group 1 compared 7 one-side open 60x60 planar P-N microstructures with the same liquid volume, different opening area and different transportation routes; Group 2 compared 4 one-side open 20x200 planar P-N microstructures with the same liquid volume, different opening area, different transportation routes, and different cross-sectional throat shape; Group 3 compared 4 four-sides open 120x30 planar P-N microstructures with the same liquid volume, the same opening area, but different transportation routes. All experiments demonstrated that large opening area and good transportation route are all beneficial to the quick-drying performance. However, the strength of different mechanisms influencing the drying performance changes with the pore network itself and the environmental conditions, including the P-N size, P-N aspect ratio, cross-sectional shape of throats, and environmental humidity. Accordingly, the optimum microstructure of quick-drying porous media changes with all these conditions. The final optimal design for a quick-drying microstructure can only be achieved by getting back to the fundamental pore-level dynamics which takes all the influencing mechanisms into account.

Porous media microstructure drying quick drying performances pore-network model invasion-percolation algorithm film effect

SCI ; EI

英语

第一 ; 通讯

Engineering

Engineering, Chemical ; Engineering, Mechanical

WOS:000729043800001

TAYLOR & FRANCIS INC

20215111368176

Aspect ratio ; Drying ; Liquids ; Microstructure ; Porous materials ; Solvents

Chemical Agents and Basic Industrial Chemicals:803 ; Materials Science:951

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
2.Univ Wisconsin Milwaukee, Dept Mech Engn, Lab Flow & Transport Studies Porous Media, Milwaukee, WI USA

Xu, Zhenyu,Pillai, Krishna M.. Influence of pore-network microstructure on the isothermal-drying performance of porous media[J]. DRYING TECHNOLOGY,2021,40:767-780.

Xu, Zhenyu,&Pillai, Krishna M..(2021).Influence of pore-network microstructure on the isothermal-drying performance of porous media.DRYING TECHNOLOGY,40,767-780.

Xu, Zhenyu,et al."Influence of pore-network microstructure on the isothermal-drying performance of porous media".DRYING TECHNOLOGY 40(2021):767-780.