Determination of the pore size of woven structures through image analysis

Angelova, Radostina A.

doi:10.2478/s13531-011-0045-2

Cited by 13 publications

(11 citation statements)

References 6 publications

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“…In the case of multifilaments and staple fiber yarns, the pores have a shape closer to circular: the ''corners'' of the interstices become round due to the friction between the warp and weft threads. 14 It was found in our previous work 18 that there is no difference either in the numerical results, or in the required central processing unit (CPU) time in the simulation of the air flow, between jet systems with circular and square openings. Therefore, the choice of the shape of the pores would depend on the personal preference of the researcher and on the type of the grid used, which has to assure ''high quality'' of the control volumes, convergence promptness, etc.…”

Section: Shape Of the Poresmentioning

confidence: 98%

“…The current study is based on systematic experimental research on jet systems [19][20][21] and experimental investigation of the pores' morphology and distribution in woven structures, 14 as well as a numerically tested method for CFD simulation of the air permeability, based on jet systems' theory. 18 …”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…10 Although several authors considered the pores as having cylindrical shape with a constant diameter over all their length, 1,2,11,12 the pore size and shape, as well as the pore distribution, are completely uneven. 13,14 However, the application of CFD for air-permeability simulation requires the microstructure of the pores and their distribution in the woven structure to be described as close as possible to the real situation. 15 Recent successful attempts in this direction are the prediction of the air permeability of plain woven fabrics with constant warp density and changeable weft settings on the basis of volume porosity 16 and the study on high-density woven structures and their pore morphology.…”

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confidence: 99%

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Computational modeling and experimental validation of the air permeability of woven structures on the basis of simulation of jet systems

Angelova

Stankov

Kyosov

2013

Textile Research Journal

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The paper presents computational fluid dynamics-based numerical simulation of the through-thickness air permeability of woven structures, applying the theory of jet systems. The flow through the interstices between the warp and weft threads is modeled as an ''in-corridor''-ordered jet system, formed by nine jets, issuing from nine pores of the woven structure. Fifteen cases were simulated and three different turbulence models were applied in the simulation: k-", k-! and Reynolds stress model. The five simulated woven structures were manufactured and their air permeability was measured experimentally. The performed validation of the numerical results with the experimental values of the air permeability showed very good correlation with the experimental results. The analysis and the verification showed that the method can be applied for further investigation not only of the woven fabrics' air permeability, but also for investigation of the flow after a textile barrier of a woven type.

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Section: Shape Of the Poresmentioning

confidence: 98%

Section: Theoretical Backgroundmentioning

confidence: 99%

mentioning

confidence: 99%

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Computational modeling and experimental validation of the air permeability of woven structures on the basis of simulation of jet systems

Angelova

Stankov

Kyosov

2013

Textile Research Journal

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“…In the recent years, many authors have conducted studies aimed at predicting the air permeability of textile materials based on their structural parameters. These studies typically involve knitted fabrics [1][2][3][4] or woven fabrics [5][6][7][8][9][10][11][12][13] used as technical products (i.e., filters) or barriers to protect the human body from the impact of small objects, such as microparticles or microorganisms. Some of the work is based primarily on the research in real textiles, but in a growing number of works, the main role of the experiment is to verify the theoretical mathematical models describing the relationship between the geometrical structure of textiles and their utility.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Air Permeability of Knitted Fabric Using the Computational Fluid Dynamics

Puszkarz

Krucińska

2018

Autex Research Journal

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This article concerns the widespread matter of biophysical comfort. In this work, 10 double-layer knitted fabrics with potential application in multilayer garments addressed to a specific group of users, such as newborns, were investigated. The materials were constructed with the following raw materials: cotton, polypropylene, polyester, polyamide, bamboo, and viscose. The textiles with a comparable geometrical structure and different composition were tested for their air permeability. In the experimental part, the materials were tested in specific constant ambient conditions using an air permeability tester. In the simulation part, 3D models of actual textiles were designed and air permeability based on the performed simulations using finite volume method was calculated. Both measurements and simulations yielded comparable results and showed that the air permeability of the knitted fabric strongly depends on the thickness and geometrical parameters of yarn. Figure 15. The influence of the thickness of the knitted fabric on air velocity (determined experimentally and by simulation); broken curves guide the eye.

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“…Angelova [4] developed an experimental procedure for the evaluation of pore size and pore distribution in a single layer woven fabric by using image analysis. Karaguzel [5] developed a structural model for the estimation of pore size of knitted fabric.…”

Section: Introductionmentioning

confidence: 99%

Porosity Prediction of Plain Weft Knitted Fabrics

Siddiqui

Sun

2014

Fibers

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Wearing comfort of clothing is dependent on air permeability, moisture absorbency and wicking properties of fabric, which are related to the porosity of fabric. In this work, a plug-in is developed using Python script and incorporated in Abaqus/CAE for the prediction of porosity of plain weft knitted fabrics. The Plug-in is able to automatically generate 3D solid and multifilament weft knitted fabric models and accurately determine the porosity of fabrics in two steps. In this work, plain weft knitted fabrics made of monofilament, multifilament and spun yarn made of staple fibers were used to evaluate the effectiveness of the developed plug-in. In the case of staple fiber yarn, intra yarn porosity was considered in the calculation of porosity. The first step is to develop a 3D geometrical model of plain weft knitted fabric and the second step is to calculate the porosity of the fabric by using the geometrical parameter of 3D weft knitted fabric model generated in step one. The predicted porosity of plain weft knitted fabric is extracted in the second step and is displayed in the message area. The predicted results obtained from the plug-in have been compared with the experimental results obtained from previously developed models; they agreed well.

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Determination of the pore size of woven structures through image analysis

Cited by 13 publications

References 6 publications

Computational modeling and experimental validation of the air permeability of woven structures on the basis of simulation of jet systems

Computational modeling and experimental validation of the air permeability of woven structures on the basis of simulation of jet systems

Modeling of Air Permeability of Knitted Fabric Using the Computational Fluid Dynamics

Porosity Prediction of Plain Weft Knitted Fabrics

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