Bibliografia publikacji pracowników
Państwowej Szkoły Wyższej w Białej Podlaskiej
Baza tworzona przez Bibliotekę Akademii Bialskiej im. Jana Pawła II.
Zapytanie:
MATHEMATICAL MODEL Liczba odnalezionych rekordów: 3
Przejście do opcji zmiany formatu | Wyświetl/ukryj etykiety | Wyświetlenie wyników w wersji do druku | Pobranie pliku do edytora | Nowe wyszukiwanie Streszczenie: A geometric model of the polymer foam structure was verified taking into account the moisture content of the material and the degree of wetness of the pore surface. Mathematical relations were developed to determine the moisture value at which transition from partial to full wetting of the pore surface occurs and vice versa. A mathematical description of the heat transport process was carried out in the model structure of moist foam taking into account the diffusion of water vapour in the pore space and the nature of wetting of the pore surface. The influence of material porosity, its moisture and water vapour diffusion within the effective porosity on the effective thermal conductivity of the material was determined by calculation. A comparison between the calculation results and experimental data shows their sufficient compatibility.
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Nr opisu: 0000036760 Autorzy: A. Alsabry, Vadzim Nikitsin, V. A. Kofanov, Beata Backiel-Brzozowska. Tytuł pracy: An analysis of relations for determining the thermal conductivity of rigid polymer foams Tytuł czasopisma: Szczegóły: 2018, Vol. 23, no. 4, p. 1015--1023 p-ISSN: 1425-1655 Charakterystyka formalna: artykuł w czasopiśmie polskim Charakterystyka merytoryczna: artykuł oryginalny naukowy Charakterystyka wg MNiSW: artykuł w czasopiśmie bez IF (wykaz MEiN) Język publikacji: ENG Punktacja ministerstwa: 15.000 Praca recenzowana Słowa kluczowe ang.: thermal insulation ; effective thermal conductivity ; rigid polymer foam ; mathematical model ; structure of used polymer foams ; analysis of experimental data Uwaga: Kopia dostępna w Sekcji Bibliometrii. https://content.sciendo.com/configurable/contentpage/journals$002fijame$002f23$002f4$002farticle-p1015.xml DOI: 10.2478/ijame-2018-0058 Streszczenie: In the paper the authors present the effectiveness of the generalized thermal conductivity method for polymer foams, including modelling their geometrical structure. Calculations of the effective thermal conductivity coefficient ? are based on the generally accepted assumption of the additivity of different thermal exchange mechanisms in porous media and this coefficient is presented as a sum the coefficients of conductive ?q, radiative ?p, and convective ?k thermal conductivity. However, in literature not enough attention is given to relations determined by means of the theory of generalized conductivity, including modelling the geometrical structure. This paper presents an analysis of these relations and verifies their ability to predict experimental data in comparison with the best formulae included in the paper