The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media
Finding a numerical method to model solute transport in porous media with high heterogeneity is crucial, especially when chemical reactions are involved. The phase space formulation termed the multi-advective water mixing approach (MAWMA) was proposed to address this issue. The water parcel method (...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/20/6562 |
| _version_ | 1797514739499139072 |
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| author | Joaquim Soler-Sagarra Vivien Hakoun Marco Dentz Jesus Carrera |
| author_facet | Joaquim Soler-Sagarra Vivien Hakoun Marco Dentz Jesus Carrera |
| author_sort | Joaquim Soler-Sagarra |
| collection | DOAJ |
| description | Finding a numerical method to model solute transport in porous media with high heterogeneity is crucial, especially when chemical reactions are involved. The phase space formulation termed the multi-advective water mixing approach (MAWMA) was proposed to address this issue. The water parcel method (WP) may be obtained by discretizing MAWMA in space, time, and velocity. WP needs two transition matrices of velocity to reproduce advection (Markovian in space) and mixing (Markovian in time), separately. The matrices express the transition probability of water instead of individual solute concentration. This entails a change in concept, since the entire transport phenomenon is defined by the water phase. Concentration is reduced to a chemical attribute. The water transition matrix is obtained and is demonstrated to be constant in time. Moreover, the WP method is compared with the classic random walk method (RW) in a high heterogeneous domain. Results show that the WP adequately reproduces advection and dispersion, but overestimates mixing because mixing is a sub-velocity phase process. The WP method must, therefore, be extended to take into account incomplete mixing within velocity classes. |
| first_indexed | 2024-03-10T06:36:01Z |
| format | Article |
| id | doaj.art-cdb9e819152f423daed4809ecaac080b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T06:36:01Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-cdb9e819152f423daed4809ecaac080b2023-11-22T18:05:08ZengMDPI AGEnergies1996-10732021-10-011420656210.3390/en14206562The Multi-Advective Water Mixing Approach for Transport through Heterogeneous MediaJoaquim Soler-Sagarra0Vivien Hakoun1Marco Dentz2Jesus Carrera3Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Jordi Girona 1-3, 08034 Barcelona, SpainFrench Geological Survey, BRGM, F-45060 Orleans, FranceInstitute of Environmental Assessment and Water Research (IDAEA), CSIC, c/ Jordi Girona 18, 08034 Barcelona, SpainInstitute of Environmental Assessment and Water Research (IDAEA), CSIC, c/ Jordi Girona 18, 08034 Barcelona, SpainFinding a numerical method to model solute transport in porous media with high heterogeneity is crucial, especially when chemical reactions are involved. The phase space formulation termed the multi-advective water mixing approach (MAWMA) was proposed to address this issue. The water parcel method (WP) may be obtained by discretizing MAWMA in space, time, and velocity. WP needs two transition matrices of velocity to reproduce advection (Markovian in space) and mixing (Markovian in time), separately. The matrices express the transition probability of water instead of individual solute concentration. This entails a change in concept, since the entire transport phenomenon is defined by the water phase. Concentration is reduced to a chemical attribute. The water transition matrix is obtained and is demonstrated to be constant in time. Moreover, the WP method is compared with the classic random walk method (RW) in a high heterogeneous domain. Results show that the WP adequately reproduces advection and dispersion, but overestimates mixing because mixing is a sub-velocity phase process. The WP method must, therefore, be extended to take into account incomplete mixing within velocity classes.https://www.mdpi.com/1996-1073/14/20/6562MAWMAmixingheterogeneity |
| spellingShingle | Joaquim Soler-Sagarra Vivien Hakoun Marco Dentz Jesus Carrera The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media Energies MAWMA mixing heterogeneity |
| title | The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media |
| title_full | The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media |
| title_fullStr | The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media |
| title_full_unstemmed | The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media |
| title_short | The Multi-Advective Water Mixing Approach for Transport through Heterogeneous Media |
| title_sort | multi advective water mixing approach for transport through heterogeneous media |
| topic | MAWMA mixing heterogeneity |
| url | https://www.mdpi.com/1996-1073/14/20/6562 |
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