The Poynting vector is a representation of the energy flux in electromagnetics, showing the amount and direction of power flow at different points in space. In electric circuits, the energy is not carried inside the wires (meaning the vector is just 0 inside them?), but by the electric and magnetic fields surrounding the wires. The DC circuit is the simplest case:
- Understanding Electricity and Circuits: What the Text Books Don’t Tell You
- IN A SIMPLE CIRCUIT, WHERE DOES THE ENERGY FLOW?
Is there an equivalent concept of energy flux for an equivalent hydraulic circuit?
Does the energy flow inside the pipes in this case? I'm guessing the energy flux has some kind of parabolic profile inside the pipes proportional to the flow rate?