简介:Two-dimensional velocity fields around a freely swimming freshwater black shark fish in longitudinal (XZ) plane and
transverse (YZ) plane are measured using digital particle image velocimetry (DPIV). By transferring mom简介:Two-dimensional velocity fields around a freely swimming freshwater black shark fish in longitudinal (XZ) plane and
transverse (YZ) plane are measured using digital particle image velocimetry (DPIV). By transferring momentum to
the fluid, fishes generate thrust. Thrust is generated not only by its caudal fin, but also using pectoral and anal fins,
the contribution of which depends on the fish’s morphology and swimming movements. These fins also act as roll
and pitch stabilizers for the swimming fish. In this paper, studies are performed on the flow induced by fins of freely
swimming undulatory carangiform swimming fish (freshwater black shark, L = 26 cm) by an experimental hydrodynamic approach based on quantitative flow visualization technique. We used 2D PIV to visualize water flow pattern
in the wake of the caudal, pectoral and anal fins of swimming fish at a speed of 0.5–1.5 times of body length per
second. 详细>