Multi-scale analysis of the effect of surfactants on bubble properties

Tutkimustuotos: Lehtiartikkeli

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Multi-scale analysis of the effect of surfactants on bubble properties. / Jávor, Z.; Schreithofer, N.; Heiskanen, K.

julkaisussa: Minerals Engineering, Vuosikerta 99, 01.12.2016, s. 170-178.

Tutkimustuotos: Lehtiartikkeli

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Bibtex - Lataa

@article{f6ef401b32c94027a24e364319cc4d27,
title = "Multi-scale analysis of the effect of surfactants on bubble properties",
abstract = "The effect of surfactants on bubble properties was examined in turbulent conditions. A multi-scale analysis was accomplished with the primary aim to identify the relationship between the size-scale determined surface properties leading to the decrease in bubble size. The adsorption of the surfactants triggers chain reactions acting along different size-scales: it diminishes the tension at the air-liquid interface and increases its surface elasticity (micro/nano-scale; 10−10 to 10−5 m) leading to modified coalescence and breakup properties and lower bubble rise velocity (meso-scale; 10−5 to 10−2 m) that finally result a smaller bubble size (macro-scale; >10−2 m). The weakly surface-active DF200 and Pentanol cause a different change in the dynamic properties of the air-liquid interface compared to the strongly surface-active DF250 and PPG leading to differences in size-scale properties and eventually in bubble size. The main result of this work is a comprehensive picture of the dynamics of surface-active molecules affecting bubble size in the presence of random momentum transfer.",
keywords = "Bubble breakup, Bubble coalescence, Dynamic surface activity, Flotation frother, Sauter mean diameter, Turbulent condition",
author = "Z. J{\'a}vor and N. Schreithofer and K. Heiskanen",
year = "2016",
month = "12",
day = "1",
doi = "10.1016/j.mineng.2016.09.026",
language = "English",
volume = "99",
pages = "170--178",
journal = "Minerals Engineering",
issn = "0892-6875",

}

RIS - Lataa

TY - JOUR

T1 - Multi-scale analysis of the effect of surfactants on bubble properties

AU - Jávor, Z.

AU - Schreithofer, N.

AU - Heiskanen, K.

PY - 2016/12/1

Y1 - 2016/12/1

N2 - The effect of surfactants on bubble properties was examined in turbulent conditions. A multi-scale analysis was accomplished with the primary aim to identify the relationship between the size-scale determined surface properties leading to the decrease in bubble size. The adsorption of the surfactants triggers chain reactions acting along different size-scales: it diminishes the tension at the air-liquid interface and increases its surface elasticity (micro/nano-scale; 10−10 to 10−5 m) leading to modified coalescence and breakup properties and lower bubble rise velocity (meso-scale; 10−5 to 10−2 m) that finally result a smaller bubble size (macro-scale; >10−2 m). The weakly surface-active DF200 and Pentanol cause a different change in the dynamic properties of the air-liquid interface compared to the strongly surface-active DF250 and PPG leading to differences in size-scale properties and eventually in bubble size. The main result of this work is a comprehensive picture of the dynamics of surface-active molecules affecting bubble size in the presence of random momentum transfer.

AB - The effect of surfactants on bubble properties was examined in turbulent conditions. A multi-scale analysis was accomplished with the primary aim to identify the relationship between the size-scale determined surface properties leading to the decrease in bubble size. The adsorption of the surfactants triggers chain reactions acting along different size-scales: it diminishes the tension at the air-liquid interface and increases its surface elasticity (micro/nano-scale; 10−10 to 10−5 m) leading to modified coalescence and breakup properties and lower bubble rise velocity (meso-scale; 10−5 to 10−2 m) that finally result a smaller bubble size (macro-scale; >10−2 m). The weakly surface-active DF200 and Pentanol cause a different change in the dynamic properties of the air-liquid interface compared to the strongly surface-active DF250 and PPG leading to differences in size-scale properties and eventually in bubble size. The main result of this work is a comprehensive picture of the dynamics of surface-active molecules affecting bubble size in the presence of random momentum transfer.

KW - Bubble breakup

KW - Bubble coalescence

KW - Dynamic surface activity

KW - Flotation frother

KW - Sauter mean diameter

KW - Turbulent condition

UR - http://www.scopus.com/inward/record.url?scp=84992398733&partnerID=8YFLogxK

U2 - 10.1016/j.mineng.2016.09.026

DO - 10.1016/j.mineng.2016.09.026

M3 - Article

VL - 99

SP - 170

EP - 178

JO - Minerals Engineering

JF - Minerals Engineering

SN - 0892-6875

ER -

ID: 9161045