Event Details

Аn optically induced convection during IR laser interaction with water will be discussed. The numerical simulations performed using the developed model show that the optical pressure and ponderomotive forces produce water flow in the direction of the laser beam propagation. In the later stage of interaction, when the water temperature rises, the Archimedes force becomes comparable and, ultimately, dominant, producing convection directed against the vector of gravitational acceleration (upward). Because the ponderomotive induced and thermally induced convective flows have opposite directions, turbulent water mixing develops. Тhe theoretical estimates and numerical simulations predict fluid dynamics similar to observed in recent experiments.