67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0033: Visualization of currents inside an oscillating water drop

Authors

• Gerardo Rangel Paredes, Physics Department, School of Science, UNAM
• David Porta Zepeda, Physics Department, School of Science, UNAM
• Carlos Echeverria Arjonilla, Physics Department, School of Science, UNAM
• Catalina Stern, Physics Department, School of Science, UNAM

DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0033

This fluid dynamics video shows an oscillating water drop forced vertically at 60Hz. If the video is taken at 3200fps, the underlying geometrical structure can be observed. If the video is taken at 60fps structure is not detected. However, if a drop of dye is injected on one side, the presence of currents inside the drop can be observed even at 60fps. If the dye is injected on the top, an unexpected geometrical stationary pattern is observed. After more than 50secs, the drop seems to react to the increase in volume, and the pattern changes completely. Finally, a similar drop at the same frequency is visualized using toner powder, the underlying currents appear clearly.