Heat losses from the human body occur through a barrier of one or more textile layers with particular permeability, thermal insulation, water absorption abilities, etc. The convective boundary layer (CBL) around the clothed body is disturbed during body movement, and the air layer between the body and the textile layer(s) is broken up, thus changing the heat transfer through the textile layer and its insulation abilities. The purpose of the present study was to evaluate the effect of the convective boundary layer around the human body on the heat transfer through a textile layer by numerical simulation, using Computational Fluid Dynamics and a commercial CFD software package, by means of the Finite Volume Method. A new approach for modeling a textile surface was applied based on the theory of  jet systems. The results of the study indicated that  heat transfer trough the textile barrier is strongly influenced by the speed of the convective layer around the human body and  the textile layer placed in between the body and the environment.

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Numerical Study of the Effect of a Natural Convective Boundary Layer around  the Human Body on the Transfer of Heat through a Textile Structure

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Nr DOI: 10.5604/12303666.1167431

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Abstract:

Heat losses from the human body occur through a barrier of one or more textile layers with particular permeability, thermal insulation, water absorption abilities, etc. The convective boundary layer (CBL) around the clothed body is disturbed during body movement, and the air layer between the body and the textile layer(s) is broken up, thus changing the heat transfer through the textile layer and its insulation abilities. The purpose of the present study was to evaluate the effect of the convective boundary layer around the human body on the heat transfer through a textile layer by numerical simulation, using Computational Fluid Dynamics and a commercial CFD software package, by means of the Finite Volume Method. A new approach for modeling a textile surface was applied based on the theory of  jet systems. The results of the study indicated that  heat transfer trough the textile barrier is strongly influenced by the speed of the convective layer around the human body and  the textile layer placed in between the body and the environment.

Tags:

convective boundary layer, computational fluid dynamics, convective heat transfer, textiles, human body.

Citation:

Angelova RA, de Bujanda Carasusán AM, Stankov P, Kyosov M. Numerical Study of the Effect of a Natural Convective Boundary Layer around the Human Body on the Transfer of Heat through a Textile Structure. FIBRES & TEXTILES in Eastern Europe  2015; 23, 6(114): 131-137. DOI: 10.5604/12303666.1167431

Published in issue no 6 (114) / 2015, pages 131–137.

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