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Axial velocity in tube with inward/outward-moving hump (inlet Re = 200). (a) Time t = 1.5 when the wall is moving outward to the flat position. (b) Time t = 2.5 when wall is moving outward from flat position. (c) Time t = 3.5 when the wall is moving inward to the flat position. (Scale = −1.703–3.773.)
