Figure 2: The flow field. (a-b) Streamlines when the left (a) or right (b) channel are open, respectively. (c-d) The magnitude of velocity. In the channel, a Poiseuille-flow-like velocity profile is developed. The units of the color code is [µm/s]. (e-f) The pressure field drops linearly in the channels, and flattens in the chamber-transition-zone, where the effective flow-crosssection is increased. The color code is given in LB units.