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Predictive modelling of dispersion controlled reactive plumes at the laboratory-scale

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Title: Predictive modelling of dispersion controlled reactive plumes at the laboratory-scale
Authors: Ham, P.A.S.1 hamp@porus-solutions.co.uk, Prommer, H.1,2, Olsson, Å.H.3, Schotting, R.J.1, Grathwohl, P.3
Source: Journal of Contaminant Hydrology. Aug2007, Vol. 93 Issue 1-4, p304-315. 12p.
Subjects: Hydrology, Hydrolysis, Diffusion in hydrology, Porous materials, Partial differential equations, Stokes equations, Hydraulics, Fluid mechanics
Abstract: A model-based interpretation of laboratory-scale experimental data is presented. Hydrolysis experiments carried out using thin glass tanks filled with glass beads to construct a hypothetical and inert, homogeneous porous medium were analysed using a 2D numerical model. A new empirical formula, based upon results for non-reactive (tracer) experiments is used to calculate transversal dispersivity values for a range of grain sizes and any flow velocities. Combined with effective diffusion coefficients calculated from Stokes–Einstein type equations, plume lengths arising from mixing between two solutes can be predicted accurately using numerical modelling techniques. Moreover, pH and ion concentration profiles lateral to the direction of flow of the mixing species can be determined at any given point downstream, without the need for result fitting. In our case, this approach does not lead to overpredictions of lateral mixing, as previously reported when using parameters derived from non-reactive tracer experiments to describe reactive solute transport. The theory is based on the assumption of medium homogeneity. [Copyright &y& Elsevier]
Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 25934514
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Predictive modelling of dispersion controlled reactive plumes at the laboratory-scale
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  Data: <searchLink fieldCode="DE" term="%22Hydrology%22">Hydrology</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrolysis%22">Hydrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+in+hydrology%22">Diffusion in hydrology</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Partial+differential+equations%22">Partial differential equations</searchLink><br /><searchLink fieldCode="DE" term="%22Stokes+equations%22">Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulics%22">Hydraulics</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+mechanics%22">Fluid mechanics</searchLink>
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  Data: A model-based interpretation of laboratory-scale experimental data is presented. Hydrolysis experiments carried out using thin glass tanks filled with glass beads to construct a hypothetical and inert, homogeneous porous medium were analysed using a 2D numerical model. A new empirical formula, based upon results for non-reactive (tracer) experiments is used to calculate transversal dispersivity values for a range of grain sizes and any flow velocities. Combined with effective diffusion coefficients calculated from Stokes–Einstein type equations, plume lengths arising from mixing between two solutes can be predicted accurately using numerical modelling techniques. Moreover, pH and ion concentration profiles lateral to the direction of flow of the mixing species can be determined at any given point downstream, without the need for result fitting. In our case, this approach does not lead to overpredictions of lateral mixing, as previously reported when using parameters derived from non-reactive tracer experiments to describe reactive solute transport. The theory is based on the assumption of medium homogeneity. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jconhyd.2007.04.002
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 304
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      – SubjectFull: Hydrology
        Type: general
      – SubjectFull: Hydrolysis
        Type: general
      – SubjectFull: Diffusion in hydrology
        Type: general
      – SubjectFull: Porous materials
        Type: general
      – SubjectFull: Partial differential equations
        Type: general
      – SubjectFull: Stokes equations
        Type: general
      – SubjectFull: Hydraulics
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      – SubjectFull: Fluid mechanics
        Type: general
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      – TitleFull: Predictive modelling of dispersion controlled reactive plumes at the laboratory-scale
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            NameFull: Ham, P.A.S.
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            NameFull: Prommer, H.
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            NameFull: Olsson, Å.H.
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            NameFull: Schotting, R.J.
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            NameFull: Grathwohl, P.
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              Text: Aug2007
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              Y: 2007
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