SLESSOR, M. D., BOND, C. L., and DIMOTAKIS, P. E. 1998
"Turbulent shear-layer mixing at high Reynolds numbers: effects of inflow conditions,"
J. Fluid Mech. vol. 376, 115-138.
We report on the results from a set of incompressible, shear-layer flow
experiments, for high local Reynolds numbers, i.e.,
2 x 105 ,
rm is the density of fluid mixed at the entrainment ratio,
DU = U1-U2 is the shear-layer freestream velocity difference,
dT is the 1% temperature-rise thickness for chemically-reacting shear layers, and
mm is the viscosity of fluid mixed at the entrainment ratio).
In these experiments, the inflow conditions of shear-layer formation were varied.
Both inert and chemically-reacting flows were investigated; the
latter employing the (H2+NO) / F2 chemical system, in the
kinetically-fast regime, to measure molecular mixing.
Inflow conditions were varied by perturbing each, or both, boundary
layers on the splitter plate separating the two freestream flows,
upstream of shear-layer formation.
The results of the chemically-reacting "flip experiments" reveal that
seemingly-small changes in inflow conditions can have a significant
influence not only on the large-scale structure and shear-layer growth
rate, as had been documented previously, but also on molecular
mixing and chemical-product formation, far downstream of the inflow