Effect of Initial Conditions on Turbulent Pipe Mixing

Abstract

Despite its use in numerous industrial applications, the specific mechanisms governing mixing in pipe flow are not fully understood. Recent experiments by Guilkey et al. (1997) indicate that simple changes in the geometry of the inlet at which the scalar is introduced can lead to substantial differences in the rate of scalar variance decay downstream. In an effort to better understand this phenomenon, the effects of two different initial conditions on mixing in turbulent pipe flow were investigated. The present results are compared with three earlier turbulent mixing experiments. Overall, the results of these experiments demonstrate that the method used to introduce two constituents to be mi..