Permeability calculations in three-dimensional isotropic and oriented fiber networks

The study of creeping flow in fibrous media is of considerable interest in many biological and biomedical applications. There is little work, however, on permeability calculations in three-dimensional random networks. Computational power is now sufficient to calculate permeabilities directly by constructing artificial fiber networks and simulating flow through them. Even with today’s high-performance computers, however, such an approach would be infeasible for large simulations. It is therefore necessary to develop a correlation based on fiber volume fraction, radius and orientation, preferably by incorporating previous studies on isotropic or structured networks. In this work, the direct calculations were performed, using the finite element method, on networks with varying degrees of orientation, and combinations of results for flow parallel and perpendicular to a single fiber or an array thereof, using a volume averaging theory, were compared to the detailed analysis.

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Three-Dimensional CdS@Carbon Fiber Networks: Innovative Synthesis and Application as a General Platform for Photoelectrochemical Bioanalysis

Analytical Chemistry ◽

10.1021/acs.analchem.9b01186 ◽

2019 ◽

Cited By ~ 5

Author(s):

Yuan-Cheng Zhu ◽

Yi-Tong Xu ◽

Yi Xue ◽

Gao-Chao Fan ◽

Pan-Ke Zhang ◽

...

Keyword(s):

Carbon Fiber ◽

Three Dimensional ◽

Fiber Networks

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Electrospun Nanomaterials for Energy Applications: Recent Advances

Applied Sciences ◽

10.3390/app9061049 ◽

2019 ◽

Vol 9 (6) ◽

pp. 1049 ◽

Cited By ~ 13

Author(s):

Saveria Santangelo

Keyword(s):

Large Scale ◽

Three Dimensional ◽

Cost Effective ◽

Water Desalination ◽

High Porosity ◽

Capacitive Deionization ◽

Fiber Networks ◽

Energy Applications ◽

Recent Advances ◽

Highly Porous

Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

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