Bi-Stability and Hysteresis in Transversely Excited Swirling Flows

Bi-Stability and Hysteresis in Transversely Excited Swirling Flows Ravi Gupta, Indian Institute of Science, Bangalore Rajat Gohiya, Indian Institute of Science, Bangalore Pratikash Panda, Indian Institute of Science, Bangalore DOI: It is a known phenomenon that swirling jets transition to conical mode of vortex breakdown upon transverse acoustic excitation. To the best of our knowledge this is the first instance where we show that transverse acoustic forcing could lead to a hysteresis in swirling flows. The hysteresis leads to a bistable state between a bubble type vortex breakdown (BVB) and a conical vortex breakdown (CVB). See other videos from the 2021 Gallery of Fluid Motion: