slightly increases pressure on the otherwise incompressible fluid roughly in balance with the bernoulli 39 s equation for decrease in pressure thus resulting in a minimization of cavitation fig5 through 6 show an n n u2212 1 and n u2212 2 section s depending upon the view which highlight the actual flow through the channels which are nested or interdigitated one with another using the throat edge 14 as a reference the fluid is accelerated and flows along the receding face 18 of the channel while the cross sectional area is minimized at the minimal port area 32 which then flows under the n 1 section and expands until flowing to the output port 34 as an alternative way of illustration shown in fig8 the fluid starts in an acceleration zone 40 where the fluid is accelerated by addition of kinetic energy due to the rotation of the throat edge 14 and compressing face 16 in a counterclockwise direction a portion of the fluid is then scooped between the throat edge 14 and the trailing edge 20 and the compression face 24 and shroud 22 of the input where it flows toward an inflection point 44 where it continues to be accelerated and slightly compressed as the cross sectional volume decreases due to the compression face the fluid reaches an inflection point 44 where the face recedes and becomes an expansion face 17 and to a deceleration zone 42 where the fluid is decelerated and the kinetic energy previously imparted to the fluid is converted to pressure the zones 40.