Sierpinski carpet was used as the model of porous media by changing the position of solid matrix in the model to study the effect of pore distribution on the transmission characteristics and heat transfer efficiency of porous media. The three pore distributions were distributed in a fractal primary solid matrix at the center (A), in the upper middle (B), and in the upper right (C). When the fluid flowed stably through the porous media model, the different pore distribution showed different flow and heat characteristics. The results showed that the pore distribution was an important factor affecting the transmission characteristics and heat transfer efficiency of porous media. The dimensionless permeability was expressed as k*C>k*B>k*A. Especially when the porosity of porous media was more than 0.8, the effect of pore distribution on porous media permeability was more obvious. When the fluid flows through porous media with different pore distributions, the area of the fluid?solid contacting surface at the same porosity is A>B>C, and the heat transfer effect shows that A is the best and the C is the worst. At the same time, the pore distribution affects the change of the dimension of the non-dimensional local entropy. The pore distribution influences the dimensionless local entropy generation, and the entropy generation caused by heat conduction represented by Be is the main entropy in the three kinds of pore distribution.
Tingfang YU Aliang LIU Ying ZHANG Zhiqiang WANG Wenlin YE Jincong SUN
. Effect of Pore Distribution on Flow and Heat Transfer in Porous Media[J]. The Chinese Journal of Process Engineering, 2018
, 18(3)
: 469
-476
.
DOI: 10.12034/j.issn.1009-606X.217320
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