Abstract
Pressure-driven flows of a phototactic microalgae suspension in a circular channel illuminated from its outer side were numerically analyzed. Microalgae were modeled by active phototactic particles and the volume-fraction dependence of the suspension viscosity was expressed by the Krieger-Dougherty model. The number density distribution of microalgae in the tube was calculated. It changed with the illumination intensity according to their phototactic behavior and remarkably affected the velocity profile.
