About: Heat transfer in one-dimensional micro- and nano-cellular foams

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We investigate heat transfer in one-dimensional multi-layer models of polymer foams and determine their equivalent thermal conductivities. The proposed model considers the participating gas and solid phases, i.e., combined heat transfer by conduction and radiation in both phases and partial photon reflection on phase interfaces. A correction for possible non-Fourier heat conduction in small gas cells, occurring in nanocellular foams, is implemented by the reduction of gas thermal conductivity based on the Knudsen number. The developed model was used for the optimization of foam structure with respect to its insulation properties. We found that although radiation can account for more than one-third of the total heat flux, it can be reduced in foams with cell-sizes below 100 ?m and be almost nullified by decreasing the foam cell size to sub-micron range. The presented model is a starting point for the development of an advanced model of heat transfer in spatially three-dimensional polymer foams. We investigate heat transfer in one-dimensional multi-layer models of polymer foams and determine their equivalent thermal conductivities. The proposed model considers the participating gas and solid phases, i.e., combined heat transfer by conduction and radiation in both phases and partial photon reflection on phase interfaces. A correction for possible non-Fourier heat conduction in small gas cells, occurring in nanocellular foams, is implemented by the reduction of gas thermal conductivity based on the Knudsen number. The developed model was used for the optimization of foam structure with respect to its insulation properties. We found that although radiation can account for more than one-third of the total heat flux, it can be reduced in foams with cell-sizes below 100 ?m and be almost nullified by decreasing the foam cell size to sub-micron range. The presented model is a starting point for the development of an advanced model of heat transfer in spatially three-dimensional polymer foams. (en)
Title	Heat transfer in one-dimensional micro- and nano-cellular foams Heat transfer in one-dimensional micro- and nano-cellular foams (en)
skos:prefLabel	Heat transfer in one-dimensional micro- and nano-cellular foams Heat transfer in one-dimensional micro- and nano-cellular foams (en)
skos:notation	RIV/49777513:23640/13:43918871!RIV14-MSM-23640___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ED2.1.00/03.0088), P(GPP106/12/P673), S
http://linked.open...iv/cisloPeriodika	June
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Kosek, Juraj
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Západočeská univerzita v Plzni / Nové technologie - výzkumné centrum
http://linked.open...dnocenehoVysledku	77168
http://linked.open...ai/riv/idVysledku	RIV/49777513:23640/13:43918871
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Mathematical modeling; Thermal insulation; Polymer nanofoams; Radiation; Heat transfer; Foams (en)
http://linked.open.../riv/klicoveSlovo	Heat transfer Mathematical modeling Thermal insulation Radiation Foams Polymer nanofoams
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[EB7DBB8DA3DD]
http://linked.open...i/riv/nazevZdroje	Chemical Engineering Science
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Centre of the New Technologies and Materials Investigation of heat transport in nanostructured materials
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	97
http://linked.open...iv/tvurceVysledku	Kosek, Juraj Pokorný, Richard Ferkl, Pavel Bobák, Marek
http://linked.open...ain/vavai/riv/wos	000320508700005
issn	0009-2509
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.ces.2013.04.018
http://localhost/t...ganizacniJednotka	23640

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