Flow is the action of moving along in a steady and continuous stream.
Sankey diagram and Gantt are the main charts used to visualize flow.
Sankey diagram is a great chart to visualise the flow.
The demo below visualise the source of the energy consumption for the main three sectors. The transport sector gets its main energy supply from Oil, where the industrial sector has a versatile source of energy.
Gantt is the main chart used to visualise the work flow.