Volume 7 Number 12 (Dec. 2012)
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JCP 2012 Vol.7(12): 2884-2890 ISSN: 1796-203X
doi: 10.4304/jcp.7.12.2884-289

Fractal Characteristics for Goose Down Assemblies as Porous Media

Jin Gao1, Xianwen Fu2, Jianyong Yu2
1Engineering Research Center of Technical Textile, Ministry of Education, Donghua University, Shanghai, China
2Modern Textile Institute, Donghua University, Shanghai, China


Abstract—In this paper, the fractal characteristics of goose down assembly are described by determining the pore area fractal dimension and the tortuosity fractal dimension. The goose down assembly, filled with mass of down fibers and pores, is loose and ductile. The pores are varying shapes and sizes, and distribute unevenly. Firstly, micro computed tomography is used to observe the internal microstructure of down assembly without destructing the original assembly shape. The derived computed tomography images of down assemblies with various volume fractions are then treated by two-value method. The measurement verifies that the porous structure of down assembly possesses typical fractal characteristic, and the pore area fractal dimensions Df are determined by the box counting method. According to the capillary principle the tortuous flow path in down assembly is simulated, and the fractal dimension of the tortuous flow path DT is also calculated by the same way. The results indicate that the pore area fractal dimensions decrease and the tortuosity fractal dimensions increase gradually as the volume fractions Vf of the assembly increase.

Index Terms—goose down assembly, porous media, Micro computed tomography, micropores structure, pore area fractal dimension, tortuosity fractal dimension.

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Cite: Jin Gao, Xianwen Fu, Jianyong Yu, "Fractal Characteristics for Goose Down Assemblies as Porous Media," Journal of Computers vol. 7, no. 12, pp. 2884-289, 2012.

General Information

ISSN: 1796-203X
Abbreviated Title: J.Comput.
Frequency: Bimonthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat, CNKI,etc
E-mail: jcp@iap.org
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