• The magnitude and direction of the inlet and outlet flows are depicted by the arrows. The net flow direction is to the right.
• The magnitude of the fluid pressure is depicted by its brightness: lighter gray is higher pressure, darker gray is lower pressure.
• The vertical scale is greatly exagerated for clarity. The bowing in and out of the actual pump membrane is less than $1/1000th$ of its diameter.
• The background wallpaper is from a mask used for etching pumps and valves from silicon wafers. The valves can be seen protruding from the round pump chambers.