Bibliografia publikacji pracowników
Państwowej Szkoły Wyższej w Białej Podlaskiej
Baza tworzona przez Bibliotekę Akademii Bialskiej im. Jana Pawła II.
Zapytanie: INTERPENETRATING COMPONENTS
Liczba odnalezionych rekordów: 2
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Streszczenie: A method for calculating the effective thermal conductivity of moisture-containing highly porous foamed polymers is proposed. In this method a non-additive scheme for taking into account the effect of steam diffusion on heat transfer is used. The sequential binary systems (interstitial substance from a liquid and a vapor- gas mixture, as well as a polymer skeleton and an intra-porous substance) are described by models of structures with interpenetrating components and isolated inclusions. The conditions for the transition from one model of structure to another are defined and there is not necessity to define empirical coefficients. A geometric model of wet foamed polymer has been developed, that allows us to find a way to determine the value of the boundary moisture content of pores or wetting angle at which the transition from partial wetting of the surface of the pores with liquid to full wetting and vice versa occurs. A mathematical description of the process of heat transfer in the model structure of a wet foamed polymer has been made, taking into account the diffusion of water vapor in the pore space.
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Nr opisu: 0000036761
Autorzy: V. V. Guryev, V. I. Nikitin, V. A. Kofanov.
Tytuł pracy: Učet osobennostej, âčeistoj struktury pri analize rasčetnoj teploprovodnosti gazonapolnennyh polimernyh materialov
Tytuł równoległy: Account of features of cellular structure when analyzing the calculated thermal conductivity of gas-filled polymer materials
Tytuł czasopisma:
Szczegóły: 2018, no 9, p. 98--104
p-ISSN: 0869-7019
Charakterystyka formalna: artykuł w czasopiśmie zagranicznym
Charakterystyka merytoryczna: artykuł oryginalny naukowy
Charakterystyka wg MNiSW: artykuł w innym czasopiśmie naukowym
Język publikacji: RUS
Punktacja ministerstwa: 1.000
Liczba arkuszy: 0,5
Praca recenzowana
Słowa kluczowe ang.: gas-filled polymer materials ; cellular structure ; calculated thermal conductivity ; interpenetrating components ; elementary cell
Uwaga: Kopia dostępna w Sekcji Bibliometrii.
http://www.pgs1923.ru/en/index.php?m=4&y=2018&v=09&p=15
Streszczenie: Based on the analysis of the structure of different types of gas-filled polymers (foams) during operation, it is shown that as a result of hydrothermal degradation, defects arise, leading to its change with the formation of predominantly communicating cells, which makes it possible to attribute them to structures with interpenetrating geometrically equal components. When modeling such a structure, an adequate model with an ordered structure consisting of identical elementary cells was used. The penetration of the heat flux through the unit cell is described using one of the possible methods of the theory of generalized conductivity and, as an example, a dependence is established to determine the effective thermal conductivity of the material. A number of dependencies are considered for determining the effective thermal conductivity of cellular structures with interpenetrating components and with isolated inclusions. An experimental check of these dependencies shows that the experimental data are most accurately reproduced by dependences for structures with interpenetrating components (open cellular structure). The best of them are recommended for determining the thermal conductivity both of dry and wet foams.
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