Relating solute and gas dispersion in granite at different transport velocities

L. Pugliese, T. G. Poulsen, S. Straface

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Dispersion is a key process controlling gas and solute transport in porous media. Performing dispersion tracer tests for solutes is generally much more time consuming than for gases. Ability to estimate solute dispersion based on gas dispersion data is therefore advantageous. The aim of this study was to investigate the relationship between solute and gas dispersion in selected porous media to develop a procedure for estimating solute dispersion from gas dispersion. Solute (NaCl) and gas (O2) breakthrough curves were measured at different fluid (water and gas) velocities (at identical Reynolds numbers for the two fluids). A commercial crushed granite, available in multiple particle sizes, was used as porous medium. NaCl and O2 dispersion coefficients were determined from measured breakthrough data and used to calculate solute and gas dispersivity as a function of particle size (Dm) and particle size range (R). Both solute and gas dispersivity increased with increasing R, and decreasing Dm. A simple relationship between dispersivities was found.

Original languageEnglish
Title of host publicationPoromechanics V - Proceedings of the 5th Biot Conference on Poromechanics
Pages2202-2211
Number of pages10
DOIs
StatePublished - 2013
Externally publishedYes
Event5th Biot Conference on Poromechanics, BIOT 2013 - Vienna, Austria
Duration: 10 Jul 201312 Jul 2013

Publication series

NamePoromechanics V - Proceedings of the 5th Biot Conference on Poromechanics

Conference

Conference5th Biot Conference on Poromechanics, BIOT 2013
CountryAustria
CityVienna
Period10/07/1312/07/13

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