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HYDRODYNAMIC DISPERSION IN COLUMNS OF PUMICE PARTICLES
Author(s) -
CALVET R.,
LERENARD J.,
TOURNIER C.,
HUBERT A.
Publication year - 1978
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1978.tb00795.x
Subject(s) - pumice , dispersion (optics) , range (aeronautics) , mixing (physics) , diffusion , mechanics , materials science , flow (mathematics) , porous medium , porosity , thermodynamics , optics , physics , geology , composite material , volcano , quantum mechanics , seismology
Summary A study was made of hydrodynamic dispersion in columns of pumice particles of different equivalent diameters and over a range of flow velocities. Dispersion is described by the first and second order moments of the elution curves. Two models are used to give a numerical analysis of the dispersion: a model using an apparent hydrodynamic dispersion coefficient and one using mixing cells with exchange (MCE). The part played by the stationary phase is described, and the molecular diffusion coefficient within the porous particles is calculated.