Circulation

• architecture

Describes the flow of people throughout a building.

• geology

1. The passing of any liquid or gas from the surface to the end of the drill string and back to the surface in the process of drilling a borehole. Long
2. The movement of air currents through mine openings. Long
3. In rotary drilling, the process of pumping mud-laden or other fluid down the drill pipe, through the drilling bit, and upward to the surface through the annulus between the drill-hole walls and the drill pipe.AGI
   Source: Dictionary of Mining, Mineral, and Related Terms