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Turbulent micromixing parameters from reactive mixing measurements
Author(s) -
Shenoy U. V.,
Toor H. L.
Publication year - 1989
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690351014
Subject(s) - mixing (physics) , micromixing , piecewise , turbulence , chemistry , piecewise linear function , mechanics , diffusion , probability density function , log normal distribution , tracer , thermodynamics , mathematics , mathematical analysis , physics , statistics , chromatography , analytical chemistry (journal) , nuclear physics , quantum mechanics
Previously published conversion data for turbulent diffusion‐controlled acid‐base reactions in two different multijet reactors are used to extract the mixing parameters, tracer probability density function, and variance. The PDF is obtained with this instantaneous reaction method by differentiating twice the reactive mixing plot of mean reactant concentrations. The limiting behavior for the cases of complete segregation and complete mixing is derived and turns out to be piecewise linear on the reactive mixing plot. The variance is shown to be twice the area between the actual reactive mixing curve and the limiting curve for complete mixing; it can be computed by numerical integration without any foreknowledge of the PDF shape. The method, in principle, allows detection of Dirac delta functions (which represent unmixed virgin fluid) and indeed shows significant amounts of virgin fluid close to the inlet of one of the reactors.