Detailed experimental study of bubble adhesion on hydrophobic surface

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43916857" target="_blank" >RIV/60461373:22340/18:43916857 - isvavai.cz</a>

Result on the web

<a href="http://www.journalssystem.com/ppmp/Detailed-experimental-study-of-bubble-adhesion-on-hydrophobic-surface,76195,0,2.html" target="_blank" >http://www.journalssystem.com/ppmp/Detailed-experimental-study-of-bubble-adhesion-on-hydrophobic-surface,76195,0,2.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5277/ppmp1823" target="_blank" >10.5277/ppmp1823</a>

Result language

angličtina

Original language name

Detailed experimental study of bubble adhesion on hydrophobic surface

Original language description

This work is focused on the detailed experimental study of bubble adhesion on a hydrophobic solid surface. The frame rate 16000 fps was used in side view arrangement in order to capture in detail the three-phase contact line expansion and bubble shape changes. Experiments were done in pure water and in solutions of the anionic surfactant sodium dodecyl sulphate in low, medium and high concentrations. It was found out that the rupture of a liquid film is not symmetrical with respect to the vertical axis of the bubble symmetry. This asymmetry of TPC line formation leads to bubble surface oscillations and asymmetry in dynamic contact angles. These dynamic mechanisms are diminished with increasing surfactant concentration. The non-linearity of expansion velocity was also observed. In the case of high bubble surface mobility, the expansion velocity first decreases and after few milliseconds, the second velocity maximum emerges caused by kinetic energy dissipation. In surfactant solutions, the arising Marangoni stresses should be taken into account because the expansion velocity increases in the first moments of TPC line expansion. Existing models, such as hydrodynamic and molecular-kinetic, are not able to incorporate with bubble oscillations in pure liquids as well as the non-monotonic curve of expansion velocity profile in surfactant solutions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physicochemical Problems of Mineral Processing

ISSN

1643-1049

e-ISSN

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Volume of the periodical

54

Issue of the periodical within the volume

1

Country of publishing house

PL - POLAND

Number of pages

13

Pages from-to

111-123

UT code for WoS article

000414203800012

EID of the result in the Scopus database

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