Figure 3: Formation of a maximum in the tracer distribution.
From: Harnessing catalytic pumps for directional delivery of microparticles in microchambers
(a) Areal tracer concentration n/n0, resulting from the fluid flow. (b) Maximal horizontal velocity goes to zero (red arrow) around the point where n/n0 is maximal (bold red square in a). (c) Convective vortex (yellow streamlines) dragging tracers along the bottom and aggregating them into the pile shown in a. The concentration of reagent, consumed by the catalyst along the bottom surface, is indicated by the colour bar. Simulations were performed for C0=0.1 M and rmax=1.7 × 10−2 mol m−2 s−1.
