On a model-based analysis of vortex formations and decay in flows through bio-inspired T-shaped cavities

The paper provides the VMV table and states a graphical estimate of the breakdown location at 7.8 mm between planes 11 and 12; the model reproduces this value by linear interpolation using the same data, so there is agreement on Part (1) (Table 1 and the accompanying text) . The paper also reports that helicity contours persist to the 15th plane while vorticity dissipates by the 9th, supporting the qualitative claim that vortices terminate upstream of non-negligible helicity; the model’s explanation based on u·ω alignment is consistent with this observation . However, the paper’s statement that the vortex breakdown point moves farther from the junction as inlet velocity increases is asserted in the Discussion without a quantitative multi-U analysis or a proof; under broad monotonicity assumptions, the model demonstrates this need not hold by giving a counterexample and then providing a sufficient strengthening that does imply monotonicity . Minor internal inconsistency is also present: the text identifies the “ninth plane” as 6.9 mm from the reference plane, but Table 1 lists the tenth plane at 6.9 mm (the ninth is 6.4 mm) . The single-Re simulation setting (U = 0.1 m/s, Re ≈ 400) further underscores that the correlation claim is not substantiated across U/Re in this manuscript .