It is widely recognized that the prediction of transport of contaminants in a fractured rock mass requires models that preserve several distinctive features of the inner fracture network, like heterogeneity and directionality; in this respect, Discrete Fracture Networks (DFNs) play a significant role. The solution of the associated equations would claim a high computational demand, that could be met only by using agile and robust numerical techniques. In this note a new numerical technique, fully validated from a mathematical standpoint, is applied to engineering problems, also introducing dispersion models for the description of non-stationary transport phenomena. The method results in a fast and scalable resolution tool, based on a PDE-constrained optimization approach designed to avoid mesh generation problems and allowing for transport simulations with an Eulerian approach. Examples are reported to show the quality of the solution obtained, even by using relatively coarse meshes and quite geometrically complex DFNs.

Unsteady advection-diffusion simulations in complex Discrete Fracture Networks with an optimization approach / Berrone, S.; Fidelibus, C.; Pieraccini, S.; Scialò, S.; Vicini, F.. - In: JOURNAL OF HYDROLOGY. - ISSN 0022-1694. - STAMPA. - 566:(2018), pp. 332-345. [10.1016/j.jhydrol.2018.09.031]

Unsteady advection-diffusion simulations in complex Discrete Fracture Networks with an optimization approach

Berrone, S.;Fidelibus, C.;Pieraccini, S.;Scialò, S.;Vicini, F.
2018

Abstract

It is widely recognized that the prediction of transport of contaminants in a fractured rock mass requires models that preserve several distinctive features of the inner fracture network, like heterogeneity and directionality; in this respect, Discrete Fracture Networks (DFNs) play a significant role. The solution of the associated equations would claim a high computational demand, that could be met only by using agile and robust numerical techniques. In this note a new numerical technique, fully validated from a mathematical standpoint, is applied to engineering problems, also introducing dispersion models for the description of non-stationary transport phenomena. The method results in a fast and scalable resolution tool, based on a PDE-constrained optimization approach designed to avoid mesh generation problems and allowing for transport simulations with an Eulerian approach. Examples are reported to show the quality of the solution obtained, even by using relatively coarse meshes and quite geometrically complex DFNs.
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0022169418307133-main.pdf

non disponibili

Descrizione: Articolo in versione editoriale per valutazioni ufficiali (VQR, ASN...)
Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 4.21 MB
Formato Adobe PDF
4.21 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2713431
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo