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Statements

Subject Item
n2:RIV%2F60461373%3A22340%2F13%3A43895930%21RIV14-GA0-22340___
rdf:type
n7:Vysledek skos:Concept
dcterms:description
Knowledge of bubble-particle interaction is important in many industrial processes such as in flotation. While the collision (first interaction sub-process) between bubbles and particles is influenced only by hydrodynamic forces, the bubble behaviour during the attachment (second sub-process) is influenced both by hydrodynamic and surface forces. This work is focused on the study of the three-phase contact (TPC) line expansion during bubble adhesion on hydrophobic surface and on its experimental and mathematical description. The experiments were carried out in pure water where mobile bubble surface is expected. The rising bubble was studied in dynamic arrangement, whereas the stationary bubble was analysed in static arrangement. The attachment process was recorded using a high-speed digital camera and evaluated using image analysis. The diameter of the expanding TPC line as well as the dynamic contact angle was determined. Two approaches - the hydrodynamic and the molecular-kinetic - were used for mathematical description of the TPC line expansion. According to our results, the hydrodynamic model is suitable for the description of the initial fast phase of the expansion. The molecular-kinetic model was assessed as appropriate for almost whole range of TPC expansion. Parameters of the model were evaluated and compared for both types of arrangement. Knowledge of bubble-particle interaction is important in many industrial processes such as in flotation. While the collision (first interaction sub-process) between bubbles and particles is influenced only by hydrodynamic forces, the bubble behaviour during the attachment (second sub-process) is influenced both by hydrodynamic and surface forces. This work is focused on the study of the three-phase contact (TPC) line expansion during bubble adhesion on hydrophobic surface and on its experimental and mathematical description. The experiments were carried out in pure water where mobile bubble surface is expected. The rising bubble was studied in dynamic arrangement, whereas the stationary bubble was analysed in static arrangement. The attachment process was recorded using a high-speed digital camera and evaluated using image analysis. The diameter of the expanding TPC line as well as the dynamic contact angle was determined. Two approaches - the hydrodynamic and the molecular-kinetic - were used for mathematical description of the TPC line expansion. According to our results, the hydrodynamic model is suitable for the description of the initial fast phase of the expansion. The molecular-kinetic model was assessed as appropriate for almost whole range of TPC expansion. Parameters of the model were evaluated and compared for both types of arrangement.
dcterms:title
Description of the three-phase contact line expansion Description of the three-phase contact line expansion
skos:prefLabel
Description of the three-phase contact line expansion Description of the three-phase contact line expansion
skos:notation
RIV/60461373:22340/13:43895930!RIV14-GA0-22340___
n7:predkladatel
n8:orjk%3A22340
n3:aktivita
n16:P
n3:aktivity
P(GAP101/11/0806), P(LD13025)
n3:dodaniDat
n15:2014
n3:domaciTvurceVysledku
n14:6478700 n14:6649866 n14:8976724
n3:druhVysledku
n19:D
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
68513
n3:idVysledku
RIV/60461373:22340/13:43895930
n3:jazykVysledku
n18:eng
n3:klicovaSlova
hydrodynamic model; molecular-kinetic model; three-phase contact line expansion; Bubble-particle interaction
n3:klicoveSlovo
n9:hydrodynamic%20model n9:Bubble-particle%20interaction n9:molecular-kinetic%20model n9:three-phase%20contact%20line%20expansion
n3:kontrolniKodProRIV
[B952C313D22B]
n3:mistoKonaniAkce
Kutná Hora
n3:mistoVydani
Liberec
n3:nazevZdroje
Proceedings of the International conference Experimental Fluid Mechanics 2013
n3:obor
n20:CI
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n10:LD13025 n10:GAP101%2F11%2F0806
n3:rokUplatneniVysledku
n15:2013
n3:tvurceVysledku
Basařová, Pavlína Váchová, Tereza Brabcová, Zuzana
n3:typAkce
n11:WRD
n3:zahajeniAkce
2013-11-19+01:00
s:numberOfPages
6
n13:hasPublisher
Polypress s.r.o.
n6:isbn
978-80-260-5375-0
n22:organizacniJednotka
22340