About: Durability of a drag reducing solution

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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	Účinnost snižování tření při turbulentním proudění vody pomocí malé přísady surfaktantu nezávisí jen na složení a koncentraci aditiva, teplotě roztoku, intenzitě turbulence, na předchozím mechanickém rozrušení toku apod., ale i na iontové síle roztoku a stáří roztoku. V článku je sledován i vliv koncentrace na průběh stárnutí roztoku. Reologické parametry roztoku byly časově závislé. (cs) Effectiveness of drag reduction by small addition of a surfactant in the turbulent flow of water depends not only on the structure and concentration of the additive, temperature of the solution and turbulence intensity, possible flow disturbance by a mechanical obstacle and the content of ions in water, but also on the age of the surfactant solution. We show how important aging effects are in connection with total surfactant concentration, in particular how rheological parameters of the drag reducing solution change with time. Effectiveness of drag reduction by small addition of a surfactant in the turbulent flow of water depends not only on the structure and concentration of the additive, temperature of the solution and turbulence intensity, possible flow disturbance by a mechanical obstacle and the content of ions in water, but also on the age of the surfactant solution. We show how important aging effects are in connection with total surfactant concentration, in particular how rheological parameters of the drag reducing solution change with time. (en)
Title	Durability of a drag reducing solution Trvanlivost roztoků snižujících tlakové ztráty (cs) Durability of a drag reducing solution (en)
skos:prefLabel	Durability of a drag reducing solution Trvanlivost roztoků snižujících tlakové ztráty (cs) Durability of a drag reducing solution (en)
skos:notation	RIV/67985874:_____/08:00095970!RIV08-AV0-67985874
http://linked.open.../vavai/riv/strany	12421;12429
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA101/06/1478), Z(AV0Z20600510)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Myška, Jiří Mík, Václav Chára, Zdeněk Štern, Petr
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	Ústav pro hydrodynamiku AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	364508
http://linked.open...ai/riv/idVysledku	RIV/67985874:_____/08:00095970
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	drag reduction; surfactants; viscoelasticity; degradation of additives (en)
http://linked.open.../riv/klicoveSlovo	viscoelasticity drag reduction surfactants degradation of additives
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[C180B7EBD96A]
http://linked.open...i/riv/nazevZdroje	Applied Rheology
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Study of the effects of micellar additives on heat transfer and pressure losses
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	18
http://linked.open...iv/tvurceVysledku	Chára, Zdeněk Štern, Petr Myška, Jiří Mík, Václav
http://linked.open...n/vavai/riv/zamer	Dynamics of Fluid Systems and Transformation Processes in Hydrosphere
issn	1430-6395
number of pages	9 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Durability of a drag reducing solution Durability of a drag reducing solution Durability of a drag reducing solution Durability of a drag reducing solution

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