Flow of Aqueous Surfactant Solution due to a Rotating Disc in a Cylindrical Casing
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This paper deals with a flow of an aqueous surfactant solution due to a rotating disc in a cylindrical casing with aspect ratio H/R=2, where H and R is the height of the cylindrical casing and the radius of the rotating disc, respectively. The aqueous surfactant solution (C_<14>TASal), whose concentration is 0.4, 0.8 and 1.2%, is consisted of n-tetradecyltrimethylammonium bromide (C_<14>TABr) and sodium salicylate (NaSal). The swirling flow was investigated using a flow visualization technique and a two-component laser Doppler velocimetry (LDV) system. It was found that the projection was moving up and down at a constant frequency near the rotating disc, as not seen in polymer solutions.
