title: Suppression and regeneration of camphor-driven Marangoni flow with the addition of sodium dodecyl sulfate.
abstract: We investigated the Marangoni flow around a camphor disk on water with the addition of sodium dodecyl sulfate (SDS). The flow velocity decreased with an increase in the concentration of SDS in the aqueous phase, and flow was hardly observed around the critical micelle concentration (cmc), because SDS reduced the driving force of Marangoni flow. However, the flow velocity increased with a further increase in the concentration of SDS. Thus, the Marangoni flow is maximally inhibited around the cmc of SDS. In this paper, we concluded that the regeneration of Marangoni flow originates from an increase in the dissolution rate of camphor into the SDS aqueous solution.
authors.affiliation: Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan.
authors.forename: Yumihiko S
authors.initials: YS
authors.lastname: Ikura
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Tenno
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kitahata
authors.forename: Nobuhiko J
authors.initials: NJ
authors.lastname: Suematsu
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakata