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Published (Version of Record)CC BY V4.0, Open Access
Journal article
Numerical analysis of apparatus-induced dispersion for density-dependent solute transport in porous media
The ANZIAM Journal, Vol.65(1-2), pp.178-194
2023
Abstract
The effects of apparatus-induced dispersion on nonuniform, density-dependent flow in a cylindrical soil column were investigated using a finite-element model. To validate the model, the results with an analytical solution and laboratory column test data were analysed. The model simulations confirmed that flow nonuniformities induced by the apparatus are dissipated within the column when the distance to the apparatus outlet exceeds 3R/2, where R represents the radius of the cylindrical column. Furthermore, the simulations revealed that convergent flow in the vicinity of the outlet introduces additional hydrodynamic dispersion in the soil column apparatus. However, this effect is minimal in the region where the column height exceeds 3R/2. Additionally, it is found that an increase in the solution density gradient during the solute breakthrough period led to a decrease in flow velocity, which stabilized the flow and ultimately reduced dispersive mixing. Overall, this study provides insights into the behaviour of apparatus-induced dispersion in nonuniform, density-dependent flow within a cylindrical soil column, shedding light on the dynamics and mitigation of flow nonuniformities and dispersive mixing phenomena.
Details
- Title
- Numerical analysis of apparatus-induced dispersion for density-dependent solute transport in porous media
- Authors/Creators
- H. ZhangD.A. BarryB. SeymourGraeme Hocking - Murdoch University, Centre for Animal Production and Health
- Publication Details
- The ANZIAM Journal, Vol.65(1-2), pp.178-194
- Publisher
- Cambridge University Press on behalf of Australian Mathematical Publishing Association Inc.
- Identifiers
- 991005606268907891
- Copyright
- © 2023 The Author(s)
- Murdoch Affiliation
- School of Mathematics, Statistics, Chemistry and Physics; Centre for Animal Production and Health
- Resource Type
- Journal article
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