Diffusion of low-concentration surfactant from the rising drop

Authors

  • Мария Олеговна Денисова (Maria O. Denisova) Institute of Continuous Media Mechanics UB RAS
  • Мария Владимировна Ошмарина (Maria V. Oshmarina) Institute of Continuous Media Mechanics UB RAS

DOI:

https://doi.org/10.17072/1994-3598-2020-4-29-36

Keywords:

diffusion, convective mass transfer, pop-up droplet

Abstract

This paper presents an experimental study of the initial stage of extraction of surfactant from the insoluble drop, which rises slowly in quiescent fluid. The placement of the drop in a narrow vertical gap causes it to take the form of a short horizontal cylinder with a free lateral surface and flat ends. The latter feature makes it possible to use an interferometer for visualizing the structure of the resulting flows and concentration fields inside the drop and surrounding medium and to trace their evolution. The changes in the flow and concentration fields are studied for the case when the low-concentration surfactant is diffused from a quiescent drop. As a result of the performed measurements, the dependences of the characteristics of mass transfer in the droplet on the initial concentration of the diffusing reagent and time were determined.

References

Ermakov S. A., Ermakov A. A., Chupakhin O. N., Vaissov D. V. Mass transfer with chemical reaction in conditions of spontaneous interfacial convection in processes of liquid extraction. Chemical Engineering Journal. 2001, vol. 84, no. 3, pp. 321–324.

Amar A., GroßHardt E., Khrapitchev A. A., Stapf S., Pfennig A., Blumich B. Visualizing flow vortices inside a single levitated drop. Journal of Magnetic Resonance, 2005, vol. 177, pp. 74–85.

Brounshtein B. I., Rivkind V. Ya., Fishbein G. A., Shuster A. R. Mass transfer accompanied by a chemical reaction taking place rapidly inside a moving spherical drop. Journal of Engineering Physics, , 1974, vol. 26, pp. 699–703.

Watada H., Hamielec A. E., Johnson A. I. A. Theoretical study of mass transfer with chemical reaction in drops. The Canadian Journal of Chemical Engineering, 1970, vol. 48, no. 3, pp. 255–261.

Mendes-Tatsis M. A., Agble D. The effect of surfactants on Marangoni convection in the isobutanol/water system. Journal of Non-Equilibrium Thermodynamics, 2001, vol. 25, no. 3, pp. 239–249.

Tsuji K., Müller S. C. Chemical reaction evolving on a droplet. The Journal of Physical Chemistry Letters, 2012, vol. 3, no. 8, pp. 977–980.

Kostarev K. G. The study of the extraction of surface-active component of a binary liquid from model (“cylindrical”) droplets. Colloid Journal, 2005, vol. 67, no. 3, pp. 318–323.

Kostarev K. G., Briskman V. A. Dissolution of a drop with a high content of a surface-active substance. Doklady Physics, 2001, vol. 46, no. 5, pp. 349–351.

Luo Z. Y., Shang X. L., Bai B. F. Marangoni effect on the motion of a droplet covered with insoluble surfactant in a square microchannel. Physics of Fluids, 2018, vol. 30, 077101.

Luo Z. Y., Shang X. L., Bai B. F. Effect of soluble surfactant on the motion of a confined droplet in a square microchannel. Physics of Fluids, 2019, vol. 31, 117104.

Rao S. S., Wong H. The motion of long drops in rectangular microchannels at low capillary numbers. Journal of Fluid Mechanics. 2018, vol. 852, pp. 60-104.

Bonn D., Kellay H., Amar M. B., Meunier J. Viscous finger widening with surfactants and polymers Physical Review Letters, 1995, vol. 75, no. 11, 2132.

Bonn D., Kellay H., Amar M. B., Meunier J. Viscous fingering in complex fluids. Physica A, 1995, vol. 220, pp. 60–73.

Janssen P., Anderson P. Surfactant-covered drops between parallel plates. Chemical Engineering Research and Design, 2008, vol. 86, no. 12, pp. 1388–1396.

Gallaire F., Meliga P., Laure P., Baroud C. N. Marangoni induced force on a drop in a Hele–Shaw cell. Physics of Fluids, 2014, vol. 26, 062105.

Nikolsky B. P. Handbook on chemistry, vol.3. Leningrad: Chemistry, 1965, 1008 pp. (In Russian).

Abramson A. A., Shchukin E. D. (Eds.) Handbook of Chemist. Leningrad: Chemistry, 1984, pp.392 (In Russian).

Kostarev K. G., Torokhova S. V. Instability of the interface due to surfactant diffusion in the system of immiscible liquids. Microgravity Science and Technology, 2020, vol. 32, No. 3, pp. 507-512.

Birikh R. V., Denisova M. O., Kostarev K. G., Development of concentration-capillary convection on an interfacial surface. Fluid Dynamics, 2015, vol. 50, no. 3, pp. 361–370.

Abramzon A.A., Gaevoj G. M. (Eds.) Surface-active substances. Handbook. Leningrad: Chemistry, 1979, 376 pp. (In Russian).

Heine J. S., Bart H.-J. Visualization of mass transfer during droplet formation. Chemical Engineering and Technology, 2019, vol. 42, no. 7, pp. 1388–1394

Published

2020-12-25

How to Cite

Денисова (Maria O. Denisova) М. О., & Ошмарина (Maria V. Oshmarina) М. В. (2020). Diffusion of low-concentration surfactant from the rising drop. Bulletin of Perm University. Physics, (4). https://doi.org/10.17072/1994-3598-2020-4-29-36

Issue

Section

Regular articles