Now showing items 1-20 of 39

    • A general and efficient numerical solution of reactive transport with multirate mass transfer 

      Wang, Jingjing; Carrera Ramírez, Jesús; Saaltink, Maarten Willem; Valhondo González, Cristina (2022-01)
      Article
      Open Access
      The presence of low permeability regions within porous media impacts solute transport and the distribution of species concentrations. Therefore, (bio)chemical reactions are equally affected. Multirate Mass Transfer (MRMT) ...
    • A method for incorporating chemical reactions into CODE_BRIGHT 

      Saaltink, Maarten Willem; Vilarrasa Riaño, Víctor; Gaspari, Francesca de; Silva Rojas, Orlando Enrique; Carrera Ramírez, Jesús (Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica (ETCG), 2012)
      Conference report
      Restricted access - publisher's policy
    • Analysis of water vapor adsorption in soils by means of a lysimeter and numerical modeling 

      Saaltink, Maarten Willem; Kohfahl, Claus; Molano Leno, Lidia (2020-04)
      Article
      Open Access
      Daily temperature oscillations can cause adsorption (and desorption) of atmospheric water vapor by soils. The resulting daily fluctuations in the amount of liquid water in the soil can be measured by high-precision weighing ...
    • Analytical solution to assess the induced seismicity potential of faults in pressurized and depleted reservoirs 

      Wu, Haiqing; Vilarrasa Riaño, Víctor; De Simone, Silvia; Saaltink, Maarten Willem; Parisio, Francesco (2021-01)
      Article
      Open Access
      Displaced faults crossing the reservoir could significantly increase the induced earthquake frequency in geo-energy projects. Understanding and predicting the stress variation in such cases is essential to minimize the ...
    • Bacterial transformation and biodegradation processes simulation in horizontal subsurface flow constructed wetlands using CWM1-RETRASO 

      Llorens Ribes, Esther; Saaltink, Maarten Willem; Poch, Manel; García Serrano, Joan (2011-01-01)
      Article
      Restricted access - publisher's policy
      The performance and reliability of the CWM1-RETRASO model for simulating processes in horizontal subsurface flow constructed wetlands (HSSF CWs) and the relative contribution of different microbial reactions to organic ...
    • Benchmark study of simulators for thermo-hydraulic modelling of low enthalpy geothermal processes 

      Mindel, Julian E.; Alt-Epping, Peter; Les Landes, Antoine Armandine; Beernink, Stijn; Birdsell, Daniel T.; Bloemendal, Martin; Hamm, Virginie; López, Simon; Maragna, Charles; Nielsen, Carsten M.; Olivella Pastallé, Sebastià; Perreaux, Marc; Saaltink, Maarten Willem; Saar, Martin O.; Van den Heuvel, Daniela; Vidal Montes, Rubén; Driesner, Thomas (2021-11)
      Article
      Open Access
      In order to assess the thermo-hydraulic modelling capabilities of various geothermal simulators, a comparative test suite was created, consisting of a set of cases designed with conditions relevant to the low-enthalpy range ...
    • Characterization of concrete by calibrating thermo-hydraulic multiphase flow models 

      Chaparro Sánchez, Maria Carme; Saaltink, Maarten Willem; Villar Galicia, María Victoria (2015-08-01)
      Article
      Open Access
      Evaporation tests in concrete columns have been analysed by numerical models to characterize the thermo-hydraulic properties and the processes in concrete. Two evaporation tests were performed: a column heated by a lamp ...
    • Combining fiber optic DTS, cross-hole ERT and time-lapse induction logging to characterize and monitor a coastal aquifer 

      Folch Sancho, Albert; Val Alonso, Laura del; Luquot, Linda; Martínez Pérez, Laura; Bellmunt, F.; Le Lay, Hugo; Rodellas, Valentí; Ferrer Ramos, Nuria; Palacios Pierluissi, Andrea Viviana; Marazuela Calvo, Miguel Ángel; Diego Feliu, Marc; Pool Ramírez, María; Goyetche, Tybaud; Ledo, J.; Pezard, Philipe; Bour, Olivier; Queralt, P.; Marcuello Tomàs, Amaranta; Garcia Orellana, Jordi; Saaltink, Maarten Willem; Vázquez Suñé, Enric; Carrera Ramírez, Jesús (Elsevier, 2020-09)
      Article
      Open Access
      The characterization of saline water intrusion (SWI) and its hydrodynamics is a key issue to understand submarine groundwater discharge (SGD) and manage groundwater resources in coastal areas. To test and compare different ...
    • Comparing precision lysimeter rainfall measurements against rain gauges in a coastal dune belt, Spain 

      Kohfahl, Claus; Saaltink, Maarten Willem (Elsevier, 2020-12)
      Article
      Restricted access - publisher's policy
      Precipitation measurements are performed mostly by simple automatic rain gauges installed at a certain level above the ground surface, but these methods are often affected by significant measurement errors due to the ...
    • Compositional formulation for multi phase flow reactive transport in porous media: an approach that simplifies coupling between phenomena 

      Gamazo Rusnac, Pablo Andres; Saaltink, Maarten Willem; Carrera Ramírez, Jesús (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2010)
      Conference report
      Open Access
      In this work we discuss coupling difficulties that arises when solving phase and species conservation equations. We present a compositional formulation that avoids these difficulties, and allows solving multiphase reactive ...
    • CWM1 implementation in RetrasoCodeBright: first results using horizontal subsurface flow constructed wetland data, Chemical Engineering Journal 

      Llorens Ribes, Esther; Saaltink, Maarten Willem; García Serrano, Joan (2011-01-01)
      Article
      Restricted access - publisher's policy
      Constructed Wetland Model No. 1 (CWM1) processes were implemented within RetrasoCodeBright (RCB) to simulate hydraulics and reactive transport as well as the main biodegradation and transformation processes in horizontal ...
    • Dynamics of water vapor flux and water separation processes during evaporation from a salty dry soil 

      Gran Esforzado, Meritxell; Massana, Jordi; Carrera Ramírez, Jesús; Saaltink, Maarten Willem; Olivella Pastallé, Sebastià; Ayora Ibáñez, Carlos; Lloret Morancho, Antonio (Elsevier, 2011-01)
      Article
      Restricted access - publisher's policy
      Evaporation from a salty soil generates salt accumulation near the surface with the subsequent deterioration of the soil quality. Salinization mechanisms are poorly understood despite their global impact. Vapor flux and ...
    • Evaluation of self-combustion risk in tire derived aggregate fills 

      Arroyo Alvarez de Toledo, Marcos; San Martin, Ignacio; Olivella Pastallé, Sebastià; Saaltink, Maarten Willem (2011-09)
      Article
      Restricted access - publisher's policy
      Lightweight tire derived aggregate (TDA) fills are a proven recycling outlet for waste tires, requiring relatively low cost waste processing and being competitively priced against other lightweight fill alternatives. However ...
    • Experimental and modeling investigation of multicomponent reactive transport in porous media 

      Katz, Graham; Berkowitz, Brian; Guadagnini, Alberto; Saaltink, Maarten Willem (2011-01-01)
      Article
      Restricted access - publisher's policy
      We present an experimental and modeling study of solute transport in porous media in the presence of mixing-induced precipitation of a solid phase. Conservative and reactive transport experiments were performed in a ...
    • Grimsel test site - Long-term cement studies.Reactive transport modeling of experiment 2 at Grimsel 

      Saaltink, Maarten Willem; Soler Matamala, Josep M. (2016-04)
      Research report
      Open Access
      Within the framework of the GTS-LCS project (Grimsel Test Site – Long-Term Cement Studies), an in-situ experiment lasting about 5 years was started in 2009 to study water-cement-rock interactions in fractured granite. A ...
    • GTS_LCS, in-situ experiment 2: modeling of tracer tests 09-03 

      Manette Forti, Maria Manuela; Saaltink, Maarten Willem; Soler Matamala, Josep M. (2015-02)
      Research report
      Open Access
      Within the framework of the GTS-LCS project (Grimsel Test Site – Long-Term Cement Studies), an in-situ experiment lasting about 5 years was started in 2009 to study water-cement-rock interactions in a fractured granite. ...
    • HEATSTORE: high temperature underground thermal energy storage 

      Koornneef, Joris; Guglielmetti, Luca; Hahn, Florian; Egermann, Patrick; Vangkilde-Pedersen, Thomas; Sif Aradottir, Edda; Allaerts, Koen; Viveiros, Fatima; Saaltink, Maarten Willem (2019)
      Conference lecture
      Open Access
      Thermal energy storage technologies need to be further developed and need to become an integral component in the future energy system infrastructure to meet variations in both the availability and demand of energy. The ...
    • Modelación de flujo multifase en ensayos de evaporación en columna de hormigón 

      Chaparro Sánchez, Maria Carme; Saaltink, Maarten Willem; Villar, M.V. (2011)
      Conference report
      Open Access
      Se han simulado ensayos de evaporación en dos columnas de hormigón (B y C), con el objetivo de caracterizar mejor las propiedades del hormigón del Centro de Almacenamiento de residuos radioactivos de El Cabril y los ...
    • Modeling evaporation processes in a saline soil from saturation to oven dry conditions 

      Gran Esforzado, Meritxell; Carrera Ramírez, Jesús; Olivella Pastallé, Sebastià; Saaltink, Maarten Willem (2011)
      Article
      Open Access
      Thermal, suction and osmotic gradients interact during evaporation from a salty soil. Vapor fluxes become the main water flow mechanism under very dry conditions. A coupled nonisothermal multiphase flow and a reactive ...
    • Modeling the hydrogeochemical evolution of brine in saline systems: case study of the Sabkha of Oum El Khialate in South East Tunisia 

      Nasri, N; Bouhlila, R; Saaltink, Maarten Willem; Gamazo, Pablo (2015-04)
      Article
      Open Access
      We studied the effects of evaporation and groundwater flow on the formation of salt minerals in the Sabkha of Oum El Khialate in South East Tunisia, which contains large amounts of sulfate sodium mineral deposits. Due to ...