If they all follow the same path (a steady flow), a single line results, but if they follow different paths (unsteady flow), it is possible for the line to cross over itself. In unsteady flow, ...
Unsteady Aerodynamics • Active and Passive Flow Control Techniques • Turbulence • Fluid-Structure Interactions • Wind Energy • Wildland Fire and Combustion Flows • Land-Atomosphere Interactions ...
If they all follow the same path (a steady flow), a single line results, but if they follow different paths (unsteady flow), it is possible for the line to cross over itself. In unsteady flow, ...