Three-dimensional simulation of beam propagation and heat transfer in static gas Cs DPALs using wave optics and fluid dynamics models Conference Paper uri icon

abstract

  • Analysis of beam propagation, kinetic and fluid dynamic processes in Cs diode pumped alkali lasers (DPALs), using wave optics model and gasdynamic code, is reported. The analysis is based on a three-dimensional, time-dependent computational fluid dynamics (3D CFD) model. The Navier-Stokes equations for momentum, heat and mass transfer are solved by a commercial Ansys FLUENT solver based on the finite volume discretization technique. The CFD code which solves the gas conservation equations includes effects of natural convection and temperature diffusion of the species in the DPAL mixture. The DPAL kinetic processes in the Cs/He/C 2 H 6 gas mixture dealt with in this paper involve the three lowest energy levels of Cs,(1) 6 2 S 1/2,(2) 6 2 P 1/2 and (3) 6 2 P 3/2. The kinetic processes include absorption due to the 1→ 3 D 2 transition followed by relaxation the 3 to 2 fine …

publication date

  • January 1, 2017