Optymalizacja warunków sprężonego przewodzenia ciepła i masy w wyrobach włókienniczych
Ładowanie...
Data
2012
Autorzy
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
Wydawnictwo Politechniki Łódzkiej
Lodz University of Technology Press
Lodz University of Technology Press
Abstrakt
The coupled heat and mass transport is very common physical phenomenon
within the diff erent textile structures. Thus, the heat and mass are transferred
from the heat and mass sources through the multilayer composite structure to the
surrounding. The most frequent are the transient problems whereas some of
them can be defined as the steady heat and mass transport. The problems are
formulated in generał form and the analysis of the specific case can simplify the
model introduced. Of course, each coupled problem can be analyzed
independently and the models are completely different.
First, the physical model of the coupled heat and mass transport was
introduced. The typical homogenization methods were defined and its
characterized. The number of analyzed dimensions was discussed as the result of
geometry and transport conditions within the multilayer textile composite. The
structure is described by means of the state variables, which are: the water vapor
concentration within fibres, the water vapor concentration within the free spaces
between fibres and the temperature.
The mathematical model was determined by means of the heat and mass
balances. The third equation introduced is the practical correlation concerning
the parameters of the water vapor transport.
The coupled problem is sensitivity oriented and the first-order sensitivity is
defined as the materiał derivative of an arbitrary behavioral functional with
respect to the design parameters. The sensitivity can be analyzed by means of
the direct and adjoint method. The results are the state equations, the set of
boundary and the initial conditions for the additional system associated with
each design parameter (the direct method)/the adjoint system (the adjoint
method), as well as the first-order sensitivity correlations.
Next goal is to define the optimization problem and formulate the optimality
conditions. Thus, the variational formulation of the Finite Element Method was
used. It means that the optimization functionals should have the elear physical
description. The most used are consequently defined.
The practical implementation of the analysis performed is the numerical
optimization of the transport conditions within the textile dressing with the
microcapsulated pcm-material. The oppositely directed diffusion is described by
the exudate transport from the wound to the surrounding and the transport of the
therapeutic agent from the microcapsules to the skin. The second numerical
example is the textile geomaterial which drain the earth structures and transports
the water to the surrounding.
Finally, the conclusions and the expected future trends are given.
Opis
Red. serii Monografie : Wodziński, Piotr
Słowa kluczowe
tkaniny i tekstylia - właściwości cieplne, tkaniny i tekstylia - właściwości mechaniczne, termokinetyka, sprzężona wymiana masy i ciepła, fabrics and textiles - thermal properties, fabrics and textiles - mechanical properties, thermokinetics, coupled mass and heat exchange
Cytowanie
Korycki R., Optymalizacja warunków sprężonego przewodzenia ciepła i masy w wyrobach włókienniczych., Wydawnictwo Politechniki Łódzkiej, Łódź 2012, ISBN 978-83-7283-479-9.