Fig. 2From: Synergy between flow and light fields and its applications to the design of mixers in microalgal photobioreactorsa Schemes of PBRs with 4 and 6 discrete inclined ribs, b the vortices in cross sections of these two PBRs, and c the L/D cycle frequency and pressure drop of these two PBRs [11]; legends (except ∆P) in the figure are incident light intensities; for example, 1200 represents an incident light intensity of 1200 μmol m−2 s−1Back to article page