Digitalizace textilních porézních struktur za účelem počítačové simulace transportních jevů
Title Alternative:Porous structures digitalization for purpose of a computer simulation of transport phenomena.
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Date
2010
Authors
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Publisher
Technická Univerzita v Liberci
Abstract
Tato diplomová práce se zabývá studiem textilních porózních struktur. V teoretické části je popsáno, co je porózní medium, co je to porózita a zaplnění v textilních útvarech a také, jak se člení póry dle velikosti. Práce ukazuje způsoby analýzy porózity u porózních textilních materiálů. Jsou zde popsány software, kterými se modeluje proudění tekutin skrz porózní struktury a software, kterými se modeluje stavba textilní porózní struktury. V práci je popsán algoritmus, kterým se dá zjistit porózita obecné zkoumané struktury. Tento algoritmus je dále modifikován konkrétně na textilní porózní strukturu. V praktické části je popsán princip získání digitální fotografie textilní porózní struktury. Je popsáno obrazové stanovení uspořádání vláken v textilní struktuře. Analyzuje se a vyhodnocuje se porózní textilní struktura z pohledu (např. pro stanovení zakrytí tkaniny Z) a pro studium vnitřní struktury se tvoří řezy analyzované textilní struktury. Práce se proto také zabývá problematikou tvorby řezů porózních textilních struktur. K vyhodnocení a získání porózní textilní struktury je použito mikroskopických metod (optické mikroskopie, elektronové mikroskopie, počítačové tomografie) a také obrazové analýzy. Výsledkem práce je navržený postup k získání přibližné vnitřní struktury textilního materiálu - konkrétně netkané textilie.
This diploma thesis is engaged in studies of porous materials. In theoretical part it is described what the porous medium, porosity and saturation in textile materials are and also how porous media are divided by their sizes. The work shows the ways for the porous textile structures analysis. There is described software for the flow through porous structures modeling and for the textile porous structure building. There is described an algorithm for porosity evaluation of common investigated structure. This algorithm is further modified concretely for the textile porous structure. In practical part there is described the principle of realizing the digital textile porous structure photography. There is described a spatial fibers arrangement in textile structure. The textile porous structure is analyzed and evaluated from the view (e.g. for cover definition of fabric) and slices of analyzed textile structure are created for examination of inner structure. Therefore the work also deals with the problems including slices of the porous textile structures. The microscopic methods (optical, electron microscopy and computer tomography) and image analysis are used for evaluating and gaining results of the porous textile structure. The result of this diploma thesis is the designed progress to gain of approximate inner textile structure concretely the inner structure of nonwoven textile. It is possible to use the gained binary image for algorithm dedicated to porous structures transport phenomena simulations.
This diploma thesis is engaged in studies of porous materials. In theoretical part it is described what the porous medium, porosity and saturation in textile materials are and also how porous media are divided by their sizes. The work shows the ways for the porous textile structures analysis. There is described software for the flow through porous structures modeling and for the textile porous structure building. There is described an algorithm for porosity evaluation of common investigated structure. This algorithm is further modified concretely for the textile porous structure. In practical part there is described the principle of realizing the digital textile porous structure photography. There is described a spatial fibers arrangement in textile structure. The textile porous structure is analyzed and evaluated from the view (e.g. for cover definition of fabric) and slices of analyzed textile structure are created for examination of inner structure. Therefore the work also deals with the problems including slices of the porous textile structures. The microscopic methods (optical, electron microscopy and computer tomography) and image analysis are used for evaluating and gaining results of the porous textile structure. The result of this diploma thesis is the designed progress to gain of approximate inner textile structure concretely the inner structure of nonwoven textile. It is possible to use the gained binary image for algorithm dedicated to porous structures transport phenomena simulations.
Description
katedra: KHT; přílohy: CD-ROM.; rozsah: 76 s., 3 s. příloh.
Subject(s)
porózita, stanovování porózity, provádění řezů porózních textilních struktur, digitalizace textilní porózní struktury, porosity, the means of determination of porosity, cut-execution of porous textile structures, digitalization of the textile porous structures