Determination of State Variables in Textile Composite with Membrane During Complex Heat and Moisture Transport

Abstract

The cotton-based composite is equipped with a single/double semipermeable membrane made of polyurethane (PU) (100%), which blocks liquid transport to the surrounding environment. The complex problem analyzed involves the coupled transport of water vapor within the textile material, transport of liquid water in capillaries, as well as heat transport with vapor and liquid water. The problem can be described using the mass transport equation for water vapor, heat transport equation, and mass transport equation for liquid moisture, accompanied by the set of corresponding boundary and initial conditions. State variables are determined using a complex multistage solution procedure within the selected points for each layer. The distributions of state variables are determined for different configurations of membranes.

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

“…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 ].…”

Modeling of Heat Transfer through Firefighters Multilayer Protective Clothing Using the Computational Fluid Dynamics Assisted by X-ray Microtomography and Thermography

“…The impact of the aforementioned parameters of protective clothing on the firefighter’s comfort and safety is the subject of in-depth research [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. According to [ 3 ], the biophysical comfort properties of firefighters’ protective clothing can be improved with the incorporation of superabsorbent fibers into the inner fabric layer.…”

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

“…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.…”