TY - JOUR
T1 - Dynamics of a reactive micellar oil-water interface in a flowing liquid column
AU - Niroobakhsh, Zahra
AU - Belmonte, Andrew
N1 - Funding Information:
We would like to thank R. Geist for experimental assistance, Yilan Ye for interfacial rheometry assistance in the laboratory of R. H. Colby, and L. Ibarra Bracamontes, P. D. Olmsted, A. Petroff, D. Takagi, and R. H. Colby for helpful discussions and comments. This work was supported by NSF Grant DMS-1217277 .
Funding Information:
We would like to thank R. Geist for experimental assistance, Yilan Ye for interfacial rheometry assistance in the laboratory of R. H. Colby, and L. Ibarra Bracamontes, P. D. Olmsted, A. Petroff, D. Takagi, and R. H. Colby for helpful discussions and comments. This work was supported by NSF Grant DMS-1217277.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11
Y1 - 2018/11
N2 - We present an experimental investigation of instabilities due to the formation of interfacial micellar material around a flowing liquid column. By injecting an aqueous surfactant solution (cetylpyridinium chloride) into a reservoir of organic oil (oleic acid), we observe a wide variety of morphological states, dependent on the imposed flow rate and surfactant concentration. Interfacial rheology measurements show that this material is viscoelastic. The states observed include connected and disconnected falling droplets, a moving pipelike column with various surface wave instabilities, and a straight cylindrical pipe which undergoes a buckling instability. These states result from the competition between surface tension type effects, the geometry of the flow, and the growth of the micellar material at the interface.
AB - We present an experimental investigation of instabilities due to the formation of interfacial micellar material around a flowing liquid column. By injecting an aqueous surfactant solution (cetylpyridinium chloride) into a reservoir of organic oil (oleic acid), we observe a wide variety of morphological states, dependent on the imposed flow rate and surfactant concentration. Interfacial rheology measurements show that this material is viscoelastic. The states observed include connected and disconnected falling droplets, a moving pipelike column with various surface wave instabilities, and a straight cylindrical pipe which undergoes a buckling instability. These states result from the competition between surface tension type effects, the geometry of the flow, and the growth of the micellar material at the interface.
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U2 - 10.1016/j.jnnfm.2018.06.001
DO - 10.1016/j.jnnfm.2018.06.001
M3 - Article
AN - SCOPUS:85053053955
SN - 0377-0257
VL - 261
SP - 111
EP - 122
JO - Journal of Non-Newtonian Fluid Mechanics
JF - Journal of Non-Newtonian Fluid Mechanics
ER -