Figure 7.

Collection percentages for Pe (a) 10, (b) 50 and (c) 100 calculated at the second electrode of the multielectrodic configuration. Five channel heights A were considered. The reported values were obtained setting the channel length to the fixed value of L = 20 du. Filled markers instead, represent control points from different simulations at A = 1, 3, 5 du which were performed to evaluate the presence of relevant border effects. This was achieved increasing the distances between the electrodes and the left and right borders of the channel, from 1 and 2 du to 4 and 9 du respectively (channel length L set to L = 30 du); no significant changes in collection percentages were detected. The mesh size d = 0.02 du was set according to the mesh convergence criterion of Figure 3.