Moisture diffusivity in structure of random fractal fiber bed |
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| Authors: | Fanglong Zhu Yu Zhou Qianqian Feng Dehong Xia |
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| Affiliation: | 1. College of Textile, Zhongyuan University of Technology, Zhengzhou City, PR China;2. The Chinese People?s Armed Police Forces Academy, Langfan City, PR China;3. School of Mechanical Engineering, University of Science and Technology, Beijing, PR China |
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| Abstract: | A theoretical expression related to effective moisture diffusivity to random fiber bed is derived by using fractal theory and considering both parallel and perpendicular channels to diffusion flow direction. In this Letter, macroporous structure of hydrophobic nonwoven material is investigated, and Knudsen diffusion and surface diffusion are neglected. The effective moisture diffusivity predicted by the present fractal model are compared with water vapor transfer rate (WVTR) experiment data and calculated values obtained from other theoretical models. This verifies the validity of the present fractal diffusivity of fibrous structural beds. |
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| Keywords: | Fractal Diffusivity Random fiber bed |
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