Abstract
The paper presents the results of experimental study for rising a cluster of monodispersed gas bubbles in viscous liquid with/without surfactant for the Reynolds number in the range Re = 0.01–1. The influence of the surfactant type on the dynamics of bubble cluster rising has been analyzed. The qualitative pattern of monodispersed bubble cluster rising was defined as a function of initial void fraction in the range CV = 0.001–0.04. New experimental data were obtained on velocity and drag coefficient for a compact cluster made of monodispersed bubbles rising in a liquid with/without surfactant (both for contact and contactless type of bubble rising).
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Abbreviations
- C :
-
surfactant concentration, g/l
- C V :
-
bubble void fraction in a cluster
- C D :
-
drag coefficient
- d :
-
diameter of a single bubble in cluster, m
- D :
-
equivalent spherical diameter of a bubble cluster, m
- g :
-
gravity acceleration, m/s2
- Re:
-
Reynolds number
- s :
-
distance travelled by the cluster, m
- t :
-
time, s
- T :
-
temperature, K
- u :
-
rising velocity, m/s
- μ 1 :
-
dynamic viscosity of liquid, kg/(m·s)
- ρ :
-
gas density, kg/m3
- ρ 1 :
-
liquid density, kg/m3
- σ :
-
coefficient of surface tension at gas-liquid interface, N/m
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Research was supported by the Russian Science Foundation No. 22-79-10028, https://rscf.ru/project/22-79-10028/.
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Arkhipov, V.A., Usanina, A.S. & Churkin, R.A. Laws of the monodispersed bubble cluster ascent in a viscous liquid in the presence of surfactant. Thermophys. Aeromech. 30, 1061–1072 (2023). https://doi.org/10.1134/S0869864323060094
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DOI: https://doi.org/10.1134/S0869864323060094