Figure 1
Parabolic velocity profiles of the liquid-feeding flow inside the food canal of An. sinensis and Ae. togoi.
Velocity profiles of the two mosquito species were measured by micro-PIV. R is the inner radius of the food canal in the proboscis and r is the radial distance from the center of the food canal. The velocity profiles inside the food canal exhibit a parabolic profile of the Hagen-Poiseuille flows (H-P profile). The Reynolds and the Strouhal number satisfy the conditions of the Hagen-Poiseuille flow (Re: 0.61 ± 0.29 and 0.28 ± 0.05, St: 0.008 ± 0.002 and 0.021 ± 0.004 for Ae. togoi and An. sinensis, respectively).
