OPTIMIZATION OF THE FRACTAL-LIKE ARCHITECTURE OF POROUS FIBROUS MATERIALS RELATED TO PERMEABILITY, DIFFUSIVITY AND THERMAL CONDUCTIVITY
OPTIMIZATION OF THE FRACTAL-LIKE ARCHITECTURE OF POROUS FIBROUS MATERIALS RELATED TO PERMEABILITY, DIFFUSIVITY AND THERMAL CONDUCTIVITY
复制标题
与渗透率、扩散率和导热率相关的多孔纤维材料的分形结构优化
DOI：
10.1142/s0218348x1750030x
复制
发表时间：
2017-06-01
影响因子：
4.7
通讯作者：
Ren, Wen
中科院分区：
文献类型：
--
作者：
Xiao, Boqi;Wang, Wei;Ren, Wen
在本研究中，应用所建立的理论模型，分析了与渗透率、扩散率和导热系数相关的多孔纤维材料类分形体结构的优化。实验结果表明，无因次渗透率与无因次有效扩散率之比分别随着孔隙率和弯曲分维的减小而减小，表明较低的孔隙率和弯曲分维降低了无因次渗透率与无因次有效扩散率之比，有利于防风防水织物的开发。研究还发现，无因次总有效导热系数与无因次有效导热系数的比值随弯曲分维的增大而增大，表明较低的曲折分维降低了无因次总有效导热系数与无因次有效扩散系数的比值，有利于服装隔热。优化结果表明，纤维排列较多的织物是防护服的首选，因为纤维材料中弯曲程度较低的分维意味着纤维应该更排列。
In this study, the optimization of the fractal-like architecture of porous fibrous materials related to permeability, diffusivity, and thermal conductivity was analyzed by applying the established theoretical models. It was observed that the ratio of dimensionless permeability over dimensionless effective diffusivity decreased with the decrease of porosity and tortuosity fractal dimension, respectively, which implied that lower porosity and tortuosity fractal dimension were beneficial to wind/water resistant fabric, as it reduced the ratio of dimensionless permeability over dimensionless effective diffusivity. Besides, it was found that the ratio of the dimensionless total effective thermal conductivity over dimensionless effective diffusivity increased with tortuosity fractal dimension, which implied lower tortuosity fractal dimension was beneficial to clothing insulation, as it reduced the ratio of dimensionless total effective thermal conductivity over dimensionless effective diffusivity. The optimization results indicated that fabrics with more aligned fibers were preferred for protective clothing, as the low tortuosity fractal dimension implied fibers in the fibrous materials should be more aligned.