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On the construction of dispersion approximations to the solution of the convective diffusion equation
Author(s) -
DeGance Anthony E.,
Johns Lewis E.
Publication year - 1980
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.690260313
Subject(s) - dispersion (optics) , diffusion , scalar (mathematics) , hermite polynomials , transverse plane , convection , convection–diffusion equation , dispersion relation , mechanics , mathematics , physics , mathematical analysis , thermodynamics , geometry , quantum mechanics , engineering , structural engineering
We identify dispersion approximations to the transverse average of the solution of the convective diffusion equation on exacting equality of a finite number of axial Hermite moments. The method unifies the dispersion of chemically active and passive solutes and generalizes dispersion theory to arbitrary transverse averages. We emphasize the importance of the scalar results via their application to the dispersion of a system of chemical isomers.