Abstract
Transition from laminar to turbulent flow in a laser-induced vertical convection column has been observed using a CO2–N2 laser in CO2 gas. The onset of turbulence is measured with a fine-wire resistance thermometer and laser power meter. The transition boundary in terms of cell pressure p and incident laser power P0 at a fixed beam diameter and cell geometry is found to be approximately given by p2P0 = constant, which can be shown to imply a constant-transition Reynolds number for the induced flow under certain restrictive conditions.
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