About: Recent results and persisting problems in modeling flow induced coalescence

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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	The contribution summarizes recent results of description of the flow induced coalescence in immiscible polymer blends and addresses problems that call for which solving. The theory of coalescence based on the switch between equations for matrix drainage between spherical or deformed droplets provides a good agreement with more complicated modeling and available experimental data for probability, Pc, that the collision of droplets will be followed by their fusion. A new equation for description of the matrix drainage between deformed droplets, applicable to the whole range of viscosity ratios, p, of the droplets and matrixes, is proposed. The theory facilitates to consider the effect of the matrix elasticity on coalescence. Pc decreases with the matrix relaxation time but this decrease is not pronounced for relaxation times typical of most commercial polymers. Modeling of the flow induced coalescence in concentrated systems is needed for prediction of the dependence of coalescence rate on volume fraction of droplets. The effect of the droplet anisometry on Pc should be studied for better understanding the coalescence in flow field with high and moderate deformation rates. A reliable description of coalescence in mixing and processing devices requires proper modeling of complex flow fields. The contribution summarizes recent results of description of the flow induced coalescence in immiscible polymer blends and addresses problems that call for which solving. The theory of coalescence based on the switch between equations for matrix drainage between spherical or deformed droplets provides a good agreement with more complicated modeling and available experimental data for probability, Pc, that the collision of droplets will be followed by their fusion. A new equation for description of the matrix drainage between deformed droplets, applicable to the whole range of viscosity ratios, p, of the droplets and matrixes, is proposed. The theory facilitates to consider the effect of the matrix elasticity on coalescence. Pc decreases with the matrix relaxation time but this decrease is not pronounced for relaxation times typical of most commercial polymers. Modeling of the flow induced coalescence in concentrated systems is needed for prediction of the dependence of coalescence rate on volume fraction of droplets. The effect of the droplet anisometry on Pc should be studied for better understanding the coalescence in flow field with high and moderate deformation rates. A reliable description of coalescence in mixing and processing devices requires proper modeling of complex flow fields. (en)
Title	Recent results and persisting problems in modeling flow induced coalescence Recent results and persisting problems in modeling flow induced coalescence (en)
skos:prefLabel	Recent results and persisting problems in modeling flow induced coalescence Recent results and persisting problems in modeling flow induced coalescence (en)
skos:notation	RIV/61389013:_____/14:00428566!RIV15-GA0-61389013
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP106/11/1069)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Jůza, Josef Fortelný, Ivan
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	41554
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/14:00428566
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	flow induced coalescence; polymer blends; viscoelasticity (en)
http://linked.open.../riv/klicoveSlovo	polymer blends viscoelasticity flow induced coalescence
http://linked.open...ontrolniKodProRIV	[316648F7DE46]
http://linked.open...v/mistoKonaniAkce	Nuremberg
http://linked.open...i/riv/mistoVydani	Melville
http://linked.open...i/riv/nazevZdroje	AIP Conference Proceedings
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Droplet breakup and coalescence in flowing immiscible polymer blends
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Fortelný, Ivan Jůza, Josef
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000341414900138
http://linked.open.../riv/zahajeniAkce	2013-07-15 (xsd:date)
issn	0094-243X
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1063/1.4873862
http://purl.org/ne...btex#hasPublisher	American Institute of Physics

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