Damping effect of surfactants on induced bubble shape deformations.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F23%3A00579875" target="_blank" >RIV/67985858:_____/23:00579875 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0348658" target="_blank" >https://hdl.handle.net/11104/0348658</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0174954" target="_blank" >10.1063/5.0174954</a>
Alternative languages
Result language
angličtina
Original language name
Damping effect of surfactants on induced bubble shape deformations.
Original language description
The addition of surfactants suppresses interfacial deformations, and surface elasticity is expected to play a critical role. High-speed imaging is used to study the influence of surfactants on the shape oscillations of air bubbles attached to a capillary and on the rebound of bubbles from a horizontal glass plate. The experiments are conducted in pure water and in aqueous solutions containing five different surfactants: terpineol, sodium dodecyl sulfate, hexadecyltrimethylammonium bromide, Triton X-100, and Triton X-45. The frequencies and damping times of the decaying oscillations and the restitution coefficients of the decaying rebounds are evaluated. The damping time and the restitution coefficient both decrease sharply with an increasing surfactant concentration and then reach a minimum before finally stabilizing. The oscillation frequency initially increases due to enhanced surface elasticity but then drops suddenly when the surfactant concentration corresponding to the maximum damping is reached. The suppression of bubble rebounds by surfactants bears a strong resemblance to the damping of quadrupole bubble oscillations. In both cases studied, a surface elasticity of about 4 mN/m is required to achieve the maximum damping of interfacial deformations, regardless of the surfactant used. Moreover, the bubble rebounds are found to be more susceptible to the presence of trace concentrations of surfactants.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/GA22-29605S" target="_blank" >GA22-29605S: Interactions of single bubble or drop with a vortex-ring</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics of Fluids
ISSN
1070-6631
e-ISSN
1089-7666
Volume of the periodical
35
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
122120
UT code for WoS article
001128560800003
EID of the result in the Scopus database
2-s2.0-85180966748