67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0087: The Effect Of Obstacle Wakes On Reaction Enhancement Between Two Initially Distant Scalars

Authors

• Farrokh Shoaei, University of Colorado Boulder
• Michael Soltys, University of Colorado Boulder
• Aaron True, University of Colorado Boulder
• John Crimaldi, University of Colorado Boulder

DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0087

The effect of turbulent wakes behind a round obstacle on mixing and reaction between two initially distant scalars has been investigated using a two-channel planar laser-induced fluorescence technique (2C-PLIF). The scalars are stirred and mixed in the mildly turbulent (Re=2000) wake of a round cylinder.  The scalars are released continuously with a separation that initially impedes the reaction for cases with and without the cylinder obstruction. Results indicate that mixing and reaction rates in the low-Damkohler limit between the two scalars plumes increase with the presence of the cylinder in the domain.