Flow in the minor nasal groove.

<p>Flow patterns in the minor nasal groove are visualized at a swimming speed of 1.55 m/s. Surface-limited streamlines are colored by the horizontal component of the wall shear stress; positive values indicate laterally-directed flow, while negative values indicate medially-directed flow. The large black arrows indicate the direction of the oncoming flow and the flow leaving the excurrent nostril. The black dotted line shows the flow path from the major nasal groove, while the white dotted line illustrates the flow path in the minor nasal groove. a: anterior; l: lateral; m: medial; p: posterior; mNG: minor nasal groove; MNG: major nasal groove; IN: incurrent nostril; NB: nasal bridge; EN: excurrent nostril.