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. 2021 Jul 16;77:105669. doi: 10.1016/j.ultsonch.2021.105669

Fig. 3.

Fig. 3

Flow structures in the rotor–stator interaction region of the RGHC (disc rotation is clockwise): a) DR = 10 mm (16 rough surface pins), n = 2700 RPM, Q = 8.1 L/s, Δp = 128 kPa; b) DR = 16 mm (8 smooth surface pins), n = 2700 RPM, Q = 9.5 L/s, Δp = 79.5 kPa; c) DR = 16 mm (8 smooth surface pins), n = 3000 RPM, Q = 9.9 L/s, Δp = 121 kPa.