Synchronized motion of the water surfaces around two fixed camphor disks

Kitahata, Hiroyuki; Kawata, Kouhei; Takahashi, Sachiyo; Nakamura, Masaaki; Sumino, Yutaka; Nakata, Satoshi

doi:10.1016/j.jcis.2010.07.036

Cited by 6 publications

(2 citation statements)

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“…The relationship between the surface tension and the surface concentration of the camphor layer (c), which depends on C SDS , was qualitatively reproduced by a sigmoid function. So, we adopted the following equation: 11,20,21 γðcÞ ¼ γ 0 a n a n þ c n þ γ 1 ð8Þ…”

Section: ' Numerical Calculationsmentioning

confidence: 99%

“…7,8 As another example of phenomena that result from Marangoni flow, "camphor dancing" has been well-known for several centuries, 9,10 and Marangoni flow is also observed around solid camphor on water. 11,12 Because the driving force of camphor motion is the gradient of the surface tension, Marangoni flow in a camphorÀwater system should also be suppressed by the addition of a surfactant. 12 In this study, we investigated the effect of the addition of sodium dodecyl sulfate (SDS) to the aqueous phase on the intensity of Marangoni flow around a camphor disk.…”

Section: ' Introductionmentioning

confidence: 99%

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Suppression and Regeneration of Camphor-Driven Marangoni Flow with the Addition of Sodium Dodecyl Sulfate

et al. 2012

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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.

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Section: ' Numerical Calculationsmentioning

confidence: 99%