Large eddy simulations on the flow driven by a Rushton turbine

TLDR: In this paper, large eddy simulations were performed on the flow in a baffled stirred tank, drien by a Rushton turbine at Res 29,000, using a lattice Boltzmann scheme for discretizing the Naier ) Stokes equations, and a force-field technique for representing the action of the impeller on the fluid.

Abstract: Large eddy simulations were performed on the flow in a baffled stirred tank, drien by a Rushton turbine at Res 29,000. The simulation procedure consisted of a lattice ) Boltzmann scheme for discretizing the Naier ) Stokes equations, and a force- field technique for representing the action of the impeller on the fluid. The subgrid-scale model was a conentional Smagorinsky model with a Smagorinsky constant c s 0.12. s The uniform, cubic computational grid had a size of about 6 = 10 6 nodes. The com- puter code was implemented on a parallel, shared-memory computer platform. The results on the phase-resoled aerage flow, as well as on the turbulence characteristics, are compared with phase-resoled experimental data. The trailingortex structure in the ¤icinity of the impeller was well represented by the simulations.