Numerical investigation of the heat transfer through woven textiles by the jet system theory

Angelova, Radostina A.; Kyosov, Miroslav; Stankov, Peter

doi:10.1080/00405000.2018.1484015

Cited by 9 publications

(13 citation statements)

References 11 publications

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“…The fi nite volume method was carried out using Solidworks Flow Simulation 2014 software to analyze the heat transfer through the tested assembly. The software allows to predict fl uid fl ow solving energy conservation equations and Navier-Stokes formulas [18] and allows estimating simultaneous heat transfer in solid, liquid, and gaseous states and incorporates energy exchange between these states. The above-mentioned equations are augmented by fl uid state equations and by empirical dependence of fl uid density, viscosity, and thermal conductivity on temperature.…”

Section: Physical Basis Of Heat Fl Ow Simulationmentioning

confidence: 99%

“…The simulations are performed on real clothing models and apply the numerical analysis of physical phenomena to predict the properties of the clothing. Currently, the numerical simulations are a supplement of typical traditional experiments with actual materials [12][13][14][15][16][17][18]. The goal of the research presented by Onofrei et al [14] was to create a heat transfer model in the fi refi ghter's garments exposed to heat radiation.…”

Section: Introductionmentioning

confidence: 99%

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Simulations of Heat Transfer through Multilayer Protective Clothing Exposed to Flame

Puszkarz

Machnowski

2020

Autex Research Journal

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In this paper, the safety and thermal comfort of protective clothing used by firefighters was analyzed. Three-dimensional geometry and morphology models of real multilayer assemblies used in thermal protective clothing were mapped by selected Computer-Aided Design (CAD) software. In the designed assembly models, different scales of the resolution were used for the particular layers – a homogenization for nonwoven fabrics model and designing the geometry of the individual yarns in the model of woven fabrics. Then, the finite volume method to simulate heat transfer through the assemblies caused by their exposure to the flame was applied. Finally, the simulation results with experimental measurements conducted according to the EN ISO 9151 were compared. Based on both the experimental and simulation results, parameters describing the tested clothing protective features directly affecting the firefighter’s safety were determined. As a result of the experiment and simulations, comparable values of these parameters were determined, which could show that used methods are an efficient tool in studying the thermal properties of multilayer protective clothing.

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Section: Physical Basis Of Heat Fl Ow Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulations of Heat Transfer through Multilayer Protective Clothing Exposed to Flame

Puszkarz

Machnowski

2020

Autex Research Journal

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“…Research on the utility comfort of clothing focuses primarily on biophysical comfort and sensory comfort because, unlike mental comfort studies, they are based on an objective analysis of measurable clothing parameters determined in accordance with strict standards. The key parameters of clothing that determine the biophysical comfort, such as thermal insulation, thermal resistance, water vapor resistance, and water vapor permeability, are the subject of purely experimental studies [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ] as well as experimental studies supported by theoretical research based on simulations using geometrical models of real textiles and of physical phenomena occurring inside them [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Impact of the Surface Modification Processes of Cotton and Polyester Fabrics with Various Techniques on Their Structural, Biophysical, Sensory, and Mechanical Properties

2022

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This article presents research on the assessment of the impact of surface modification of cotton and polyester fabrics using four techniques (flocking, layer by layer, screen printing and thermal-transfer printing) on their structural, mechanical, biophysical, and sensory properties. Depending on geometry and raw materials of the fabrics, the clothing made of them it is characterized by certain biophysical properties which are intended to protect the human body against external factors, but also against excessive sweating and overheating or cooling down. The aforementioned properties of the modified textiles were determined with: optical microscopy, microcomputed tomography, a tensile testing machine, sweating guarded-hotplate, air permeability tester, and the Kawabata evaluation system. Based on analysis of obtained results, it can be concluded that flocking reduces air permeability the most (−77% for cotton fabric and −99.7% for polyester fabric), and total hand value (−58% and −57%) and increases water vapor resistance the most (+769% and +612%) while the screen printing increases the thermal resistance the most (+119% and +156%) compared to unmodified textiles. It can be concluded that, when modifying textile substrates, the area of modification and their size on clothing products should be carefully selected so as not to adversely affect the feelings of potential wearers.

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“…Currently, numerical modeling is an effective and widely used tool to investigate thermal and mechanical processes occurring in textiles, among other things [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. In the current work, the experimental research was supplemented by the simulation of the thermal insulation of the assemblies by designing their 3D models using selected CAD software and applying the finite volume method.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Impact of Clothing Structures for Premature Babies on Biophysical Properties

et al. 2021

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This article presents research on ergonomics and physiological comfort of protective clothing. Biophysical properties of selected three-layer textile assemblies that differ in geometry and raw material composition for the production of types of mummy sleeping bags for premature babies were investigated. The tests included measurements of air permeability, thermal resistance and water vapor resistance (both by means of human skin model), thermal insulation, and water vapor resistance (both using newborn manikin). Experimental research was supplemented by modeling the thermal insulation of the assemblies by designing their 3D models using selected CAD software and applying the finite volume method. The obtained results allowed the evaluation of the influence of different geometry and the raw material composition of the proposed assemblies on the performance parameters of protective clothing.

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Numerical investigation of the heat transfer through woven textiles by the jet system theory

Cited by 9 publications

References 11 publications

Simulations of Heat Transfer through Multilayer Protective Clothing Exposed to Flame

Simulations of Heat Transfer through Multilayer Protective Clothing Exposed to Flame

Assessment of the Impact of the Surface Modification Processes of Cotton and Polyester Fabrics with Various Techniques on Their Structural, Biophysical, Sensory, and Mechanical Properties

Assessment of the Impact of Clothing Structures for Premature Babies on Biophysical Properties

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