Brief overview of traditional EKA

- Pressure drop across two reservoirs causes flow across the capilarry.

- Capillary surface becomes negatively charged as fluid moves across it in laminar flow.
  This pulls protons toward the surface as it flows across the surface (red).  This is known
  as the streaming current or convected current*.

- The flow of protons creates a positive node at the right reservoir. (large plus sign)

- To "close the circuit"  there is a natural flow of electrons in the reverse direction of
  the flow.  This creates a negative node in the left reservoir. (large negative sign)

* Denotes a term coined by Prof. Paul Sides.