PSI - Issue 82

Koji Uenishi et al. / Procedia Structural Integrity 82 (2026) 79–83 Uenishi et al. / Structural Integrity Procedia 00 (2026) 000 – 000

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360 ms

380 ms

400 ms

420 ms

440 ms

460 ms

480 ms

500 ms

Fig. 1. (continued)

Conical region where particles are gradually moving downwards but supplied from outside

Compressed air

Global motion

Local rotational motion

Pressurized cavity at stable dynamic equilibrium

Fig. 2. Global and local particle motion around a pressurized cavity in the stable dynamic equilibrium state [unit: cm].

Acknowledgements The research has been financially supported by the Japan Society for the Promotion of Science (JSPS) through the “KAKENHI: Grant -in- Aid for Scientific Research (C)” Program under grant number 23K04021.