Application of Combined Micro- and Macro-Scale Models to Investigate Heat and Mass Transfer through Textile Structures with Additional Ventilation

Aušra Gadeikytė (), Aušra Abraitienė and Rimantas Barauskas
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Aušra Gadeikytė: Department of Applied Informatics, Kaunas University of Technology, Studentu Str. 50-407, LT-51368 Kaunas, Lithuania
Aušra Abraitienė: Institute of Textile, Center for Physical Sciences and Technology, Demokratu Str. 53, LT-48485 Kaunas, Lithuania
Rimantas Barauskas: Department of Applied Informatics, Kaunas University of Technology, Studentu Str. 50-407, LT-51368 Kaunas, Lithuania

Mathematics, 2023, vol. 11, issue 11, 1-20

Abstract: In this study, computational models of heat and mass exchange through textile structures with additional ventilation at the micro- and macro-scale were investigated. The finite element analysis of advanced textile materials provides a better understanding of their heat and mass transfer properties, which influence thermal comfort. The developed computational models can predict air permeability (AP), thermal resistance ( R ct ), and heat transfer (h) coefficients at the micro-scale. Moreover, the mesh size was taken into consideration and validated with experimental data presented in the literature. In addition, computational models were extended to micro- and macro-scale forced ventilation models. Macro-scale finite element models require input parameters such as an effective heat transfer coefficient that are usually obtained experimentally. In this research, the heat transfer coefficients (h microlayer = 25.603 W/(K·m 2 ), h total = 8.9646 W/(K·m 2 )) were obtained numerically from the micro-scale model and were applied to a macro-scale model. The proposed methodology and developed models facilitate the determination of average temperature and temperature distributions through different through-thickness positions along the axis Oz. The simulations were carried out using Comsol Multiphysics and Matlab software.

Keywords: 3D textile; heat and mass exchange; forced ventilation; COMSOL Multiphysics (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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