Fig. 2. Close-up of a top view of the fluid-fin domain used for the numerical simulations. Shown here are the material points of the fin (black) and the Eulerian fluid grid (gray), with lengthwise grid spacing dx=0.375 mm and widthwise spacing of dy=0.4 mm. The inset shows the extent of the close-up with respect to the entire fluid-fin domain. Note that the material points do not conform to the fluid grid points.