“…Therefore, the vortex grows axially in an adverse pressure gradient ∂p/∂y > 0, the depth acting like a diffuser. The vortex bursting experiments by Sarpkaya (1995) and the Kelvin wave vortex experiments by Tsoy et al (2018) have been carried out in small angle diffusers. While pitching up or down in continuously pitching delta wings, the bursting occurs farther back or forward compared to the steady case, respectively.…”