Pub Date : 2023-10-13DOI: 10.1007/s10596-023-10253-y
Aleksandra A. Pachalieva, Matthew R. Sweeney, Hari Viswanathan, Emily Stein, Rosie Leone, Jeffrey D. Hyman
Abstract We performed a set of numerical simulations to characterize the interplay of fracture network topology, upscaling, and mesh refinement on flow and transport properties in fractured porous media. We generated a set of generic three-dimensional discrete fracture networks at various densities, where the radii of the fractures were sampled from a truncated power-law distribution, and whose parameters were loosely based on field site characterizations. We also considered five network densities, which were defined using a dimensionless version of density based on percolation theory. Once the networks were generated, we upscaled them into a single continuum model using the upscaled discrete fracture matrix model presented by Sweeney et al. (2019). We considered steady, isothermal pressure-driven flow through each domain and then simulated conservative, decaying, and adsorbing tracers using a pulse injection into the domain. For each simulation, we calculated the effective permeability and solute breakthrough curves as quantities of interest to compare between network realizations. We found that selecting a mesh resolution such that the global topology of the upscaled mesh matches the fracture network is essential. If the upscaled mesh has a connected pathway of fracture (higher permeability) cells but the fracture network does not, then the estimates for effective permeability and solute breakthrough will be incorrect. False connections cannot be eliminated entirely, but they can be managed by choosing appropriate mesh resolution and refinement for a given network. Adopting octree meshing to obtain sufficient levels of refinement leads to fewer computational cells (up to a 90% reduction in overall cell count) when compared to using a uniform resolution grid and can result in a more accurate continuum representation of the true fracture network.
{"title":"Impact of artificial topological changes on flow and transport through fractured media due to mesh resolution","authors":"Aleksandra A. Pachalieva, Matthew R. Sweeney, Hari Viswanathan, Emily Stein, Rosie Leone, Jeffrey D. Hyman","doi":"10.1007/s10596-023-10253-y","DOIUrl":"https://doi.org/10.1007/s10596-023-10253-y","url":null,"abstract":"Abstract We performed a set of numerical simulations to characterize the interplay of fracture network topology, upscaling, and mesh refinement on flow and transport properties in fractured porous media. We generated a set of generic three-dimensional discrete fracture networks at various densities, where the radii of the fractures were sampled from a truncated power-law distribution, and whose parameters were loosely based on field site characterizations. We also considered five network densities, which were defined using a dimensionless version of density based on percolation theory. Once the networks were generated, we upscaled them into a single continuum model using the upscaled discrete fracture matrix model presented by Sweeney et al. (2019). We considered steady, isothermal pressure-driven flow through each domain and then simulated conservative, decaying, and adsorbing tracers using a pulse injection into the domain. For each simulation, we calculated the effective permeability and solute breakthrough curves as quantities of interest to compare between network realizations. We found that selecting a mesh resolution such that the global topology of the upscaled mesh matches the fracture network is essential. If the upscaled mesh has a connected pathway of fracture (higher permeability) cells but the fracture network does not, then the estimates for effective permeability and solute breakthrough will be incorrect. False connections cannot be eliminated entirely, but they can be managed by choosing appropriate mesh resolution and refinement for a given network. Adopting octree meshing to obtain sufficient levels of refinement leads to fewer computational cells (up to a 90% reduction in overall cell count) when compared to using a uniform resolution grid and can result in a more accurate continuum representation of the true fracture network.","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135805723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.1007/s10596-023-10250-1
Marco Berardi, Fabio V. Difonzo, Roberto Guglielmi
Abstract In this paper we introduce an optimal control approach to Richards’ equation in an irrigation framework, aimed at minimizing water consumption while maximizing root water uptake. We first describe the physics of the nonlinear model under consideration, and then develop the first-order necessary optimality conditions of the associated boundary control problem. We show that our model provides a promising framework to support optimized irrigation strategies, thus facing water scarcity in irrigation. The characterization of the optimal control in terms of a suitable relation with the adjoint state of the optimality conditions is then used to develop numerical simulations on different hydrological settings, that support the analytical findings of the paper.
{"title":"A preliminary model for optimal control of moisture content in unsaturated soils","authors":"Marco Berardi, Fabio V. Difonzo, Roberto Guglielmi","doi":"10.1007/s10596-023-10250-1","DOIUrl":"https://doi.org/10.1007/s10596-023-10250-1","url":null,"abstract":"Abstract In this paper we introduce an optimal control approach to Richards’ equation in an irrigation framework, aimed at minimizing water consumption while maximizing root water uptake. We first describe the physics of the nonlinear model under consideration, and then develop the first-order necessary optimality conditions of the associated boundary control problem. We show that our model provides a promising framework to support optimized irrigation strategies, thus facing water scarcity in irrigation. The characterization of the optimal control in terms of a suitable relation with the adjoint state of the optimality conditions is then used to develop numerical simulations on different hydrological settings, that support the analytical findings of the paper.","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135044281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-03DOI: 10.1007/s10596-023-10256-9
Justin D. Strait, Kelly R. Moran, Jeffrey D. Hyman, Hari S. Viswanathan, Matthew R. Sweeney, Philip H. Stauffer
{"title":"Fracture network flow prediction with uncertainty using physics-informed graph features","authors":"Justin D. Strait, Kelly R. Moran, Jeffrey D. Hyman, Hari S. Viswanathan, Matthew R. Sweeney, Philip H. Stauffer","doi":"10.1007/s10596-023-10256-9","DOIUrl":"https://doi.org/10.1007/s10596-023-10256-9","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-19DOI: 10.1007/s10596-023-10254-x
N. Sri Chandrahas, B. S. Choudhary, M. S. Venkataramayya
{"title":"Competitive algorithm to balance and predict blasting outcomes using measured field data sets","authors":"N. Sri Chandrahas, B. S. Choudhary, M. S. Venkataramayya","doi":"10.1007/s10596-023-10254-x","DOIUrl":"https://doi.org/10.1007/s10596-023-10254-x","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135061311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-14DOI: 10.1007/s10596-023-10248-9
Pallabi Saikia, Rashmi Dutta Baruah
{"title":"Stacked ensemble model for reservoir characterisation to predict log properties from seismic signals","authors":"Pallabi Saikia, Rashmi Dutta Baruah","doi":"10.1007/s10596-023-10248-9","DOIUrl":"https://doi.org/10.1007/s10596-023-10248-9","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-11DOI: 10.1007/s10596-023-10246-x
Rosmery Q. Zavala, Luis F. Lozano, Grigori Chapiro
{"title":"Traveling wave solutions describing the foam flow in porous media for low surfactant concentration","authors":"Rosmery Q. Zavala, Luis F. Lozano, Grigori Chapiro","doi":"10.1007/s10596-023-10246-x","DOIUrl":"https://doi.org/10.1007/s10596-023-10246-x","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135938647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-09DOI: 10.1007/s10596-023-10252-z
Hamidreza Hamdi, Christopher R. Clarkson, Mario Costa Sousa
{"title":"Local and global timeseries proxies using functional principal component analysis: application to history-matching and uncertainty quantification","authors":"Hamidreza Hamdi, Christopher R. Clarkson, Mario Costa Sousa","doi":"10.1007/s10596-023-10252-z","DOIUrl":"https://doi.org/10.1007/s10596-023-10252-z","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136192541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-08DOI: 10.1007/s10596-023-10247-w
Octavio Castillo-Reyes, P. Rulff, Evan Schankee Um, A. Amor-Martín
{"title":"Meshing strategies for 3d geo-electromagnetic modeling in the presence of metallic infrastructure","authors":"Octavio Castillo-Reyes, P. Rulff, Evan Schankee Um, A. Amor-Martín","doi":"10.1007/s10596-023-10247-w","DOIUrl":"https://doi.org/10.1007/s10596-023-10247-w","url":null,"abstract":"","PeriodicalId":10662,"journal":{"name":"Computational Geosciences","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42767059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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