Ex uno plures: how to construct high-speed movies of collapsing cavitation bubbles from a single image

Journal article

The time-resolved visualization of the dynamics of a cavitation bubble usually requires the use of expensive high-speed cameras, which often provide a limited spatial resolution. In the present study, we propose an alternative to these high-speed imaging techniques. The method is based on the recently introduced virtual frame technique, which relates the motion of a monotonic propagating front to the resulting image blur captured on a long-exposure shadowgraph. We use a consumer-level camera to photograph the entire collapse phase of cavitation bubbles. We then demonstrate that both the dynamics of a spherically collapsing bubble and those of a bubble collapsing near a rigid boundary can be accurately reconstructed from this single photograph at a virtual frame rate of up to 2 Mfps on a 24.2 Mpx sensor.SCI-STI-M

Authors: Sieber, AB; Preso, DB; Farhat, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Experiments in Fluids
• Volume: 64
• Issue: 12
• Publication date: 2023-11-11
• DOI: 10.1007/s00348-023-03732-6
• EISSN: 1432-1114
• ISSN: 0723-4864
• Language: English
• Keywords: Tracking (education); Cavitation; Physics; Optics; High-speed photography; Computer science; Frame rate; Computer graphics (images); Computer vision; Shadowgraph; Acoustics; Mechanics; Bubble