About this 3D model

This is a vortex amplifier, a fluidic element for amplifying a fluidic signal. The supply flow(flow going straight into the circle) can be modulated by weaker control flow(flow going tangent to the circle) by the control flow inducing a vortex in the chamber. This vortex increase the resistance to flow, thus amplifying the signal from the control flow. In short, apply flow to the control flow port and there will be less flow coming out of the output port.