A cone with its top upside down is immersed in a liquid and rotated. As a result, the liquid rises along the outer surface of the cone. When the viscosity is low, such as water, a filmwise flow forms on the cone surface, leading to atomization and the release of droplets. In contrast, when the viscosity is high, filamentous lifting occurs due to the thread-forming property (extensional properties), and liquid filaments are emitted. While this phenomenon has been observed in Newtonian fluids, the behavior during lifting and ejection remains unclear for non-Newtonian fluids. In this paper, aqueous PVA solutions with various concentrations were prepared, and it was confirmed that the lifting behavior and ejection pattern change depending on the viscosity. These changes suggest that, by removing water during the lifting process, liquid filaments can be produced even from low-viscosity PVA solutions. For water removal, an induction heating method using permanent magnets is employed.
Mikami et al. (Wed,) studied this question.
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