Listar por autoría "d0af8abb-bad8-44e6-ba4b-060d65e1f691"
Mostrando ítems 1-20 de 38
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A CFD-DEM solver to model bubbly flow. Part I: Model development and assessment in upward vertical pipes
Peña Monferrer, Carlos; Monrós Andreu, Guillem; chiva, sergio; Martinez Cuenca, Raul; Muñoz-Cobo, Jose-Luis Elsevier (2018-02-02)In the computational modeling of two-phase flow, many uncertainties are usually faced in simulations and validations with experiments. This has traditionally made it difficult to provide a general method to predict the ... -
A CFD-DEM solver to model bubbly flow. Part II: Critical validation in upward vertical pipes including axial evolution
Peña Monferrer, Carlos; Monrós Andreu, Guillem; chiva, sergio; Martinez Cuenca, Raul; Muñoz-Cobo, Jose-Luis Elsevier (2018-02-23)In the computational modeling of two-phase flow, many uncertainties are usually faced in simulations and validations with experiments. This has traditionally made it difficult to provide a general method to predict the ... -
A comprehensive hydrodynamic analysis of a full-scale oxidation ditch using Population Balance Modelling in CFD simulation
Climent, Javier; Martinez Cuenca, Raul; Carratalà Mezquita, Pablo; González-Ortega, M.J.; Abellán, Manuel; Monrós Andreu, Guillem; chiva, sergio Elsevier (2019-10-15)This work exhibits the importance of the experimental validation when full-scale computational fluid dynamics (CFD) models are developed to provide a detailed analysis of the spatial variations in 3D of the fluid flow ... -
A New Coupled CFD/Neutron Kinetics System for High Fidelity Simulations of LWR Core Phenomena: Proof of Concept
Pérez Mañes, Jorge; Sánchez Espinoza, Víctor Hugo; chiva, sergio; Stieglitz, Robert Hindawi Publishing Corporation (2014-05)The Institute for Neutron Physics and Reactor Technology (INR) at the Karlsruhe Institute of Technology (KIT) is investigating the application of the meso- and microscale analysis for the prediction of local safety parameters ... -
Accelerating urban scale simulations leveraging local spatial 3D structure
Iserte, Sergio; Macias, Aina; Martínez-Cuenca, Raúl; chiva, sergio; Paredes, Roberto; Quintana-Orti, Enrique S. Elsevier (2022-06-15)This paper presents a hybrid methodology for accelerating Computational Fluid Dynamics (CFD) simulations intertwining inferences from deep neural networks (DNN). The strategy leverages the local spatial data of the velocity ... -
An experimental investigation on the characteristics of submerged horizontal gas jets in liquid ambient
Harby, K.; chiva, sergio; Muñoz-Cobo, Jose-Luis (2014)Gas injections into liquid are prevalent in the natural environment and are essential in industrial applications, they can lead to complex flow. The flow structure and processes are essentially unsteady and turbulent. In ... -
An experimental study on bubble entrainment and flow characteristics of vertical plunging water jets
Harby, K.; chiva, sergio; Muñoz-Cobo, Jose-Luis Elsevier (2014)When a vertical liquid jet plunges into a liquid surface after passing through a surrounding gas phase it entrains a large amount of gas bubbles into the receiving pool, and forms a large submerged two-phase region with a ... -
Averaging methods of the gap heat transfer coefficients and the loss form coefficients of nuclear reactor cores loaded with different fuel bundles
Sekhri, A.; Muñoz-Cobo, Jose-Luis; chiva, sergio; Escrivá, A.; Mendizábal, R.; Pelayo, F. Elsevier (2009)When performing transient analysis in heterogeneous nuclear reactors loaded with different types of fuel bundles is necessary to model the reactor core by a few representative fuel elements with average properties of a ... -
Biological reactor retrofitting using CFD-ASM modelling
Climent, Javier; Basiero, L.; Martinez Cuenca, Raul; Berlanga Clavijo, José Guillermo; Julian-Lopez, Beatriz; chiva, sergio Elsevier (2018-09-15)In recent years, the interest in modelling activated sludge (AS) systems by means of Computational Fluid Dynamics (CFD) techniques has significantly increased. This work shows a successful case study combining CFD hydrodynamics ... -
CFD modeling of a fixed-bed biofilm reactor coupling hydrodynamics and biokinetics
Prades Martell, Lledó; Dorado, A. D.; Climent, Javier; Guimerà, Xavier; chiva, sergio; Gamisans, Xavier Elsevier (2017-04-01)Rigorous modeling of transport phenomena is essential to reproduce accurately biofiltration systems performance. In this sense, the aim of this study was to investigate the effect of integrating fluid flow dynamics in the ... -
CFD modelling and validation of upward bubbly flow in an adiabatic vertical pipe using the quadrature method of moments
Peña Monferrer, Carlos; Passalacqua, A.; chiva, sergio; Muñoz-Cobo, Jose-Luis Elsevier (2016)An Eulerian–Eulerian approach was investigated to model adiabatic bubbly flow with CFD techniques. In the framework of the OpenFOAM® software, a two-fluid model solver was modified to include a population balance equation, ... -
CFD Modelling of Odour-causing Impact on Vicinity of a Waste Water Treatment Plant
Macías Martínez, Aina; Herrera, Jose V.; Climent, Javier; Domínguez, Caros; Santos, Jose María; chiva, sergio AIDIC - The Italian Association of Chemical Engineering (2021-05-15)Due to the fast growth of cities and populations, residential areas are increasingly close to Waste Water Treatment Plants (WWTPs), causing odour impact on neighbourhood and complaints. The present study focuses on ... -
CFD Turbulence Study of PWR Spacer-Grids in a Rod Bundle
Peña Monferrer, Carlos; Muñoz-Cobo, Jose-Luis; chiva, sergio Hindawi Publishing Corporation (2014-06)Nuclear fuel bundles include spacers essentially for mechanical stability and to influence the flow dynamics and heat transfer phenomena along the fuel rods. This work presents the analysis of the turbulence effects of a ... -
Depuración de aguas residuales: digestión anaerobia
chiva, sergio; Berlanga Clavijo, José Guillermo; Martinez Cuenca, Raul; Climent, Javier Publicacions de la Universitat Jaume I, (2018)La càtedra universitat-empresa FACSA d'Innovació en el Cicle Integral de l'Aigua de la Universitat Jaume I té com a objectiu fomentar l'intercanvi d'idees, la transferència de coneixement i la trobada entre tots els actors ... -
Design and optimization of a semi‐industrial cavitation device for a pretreatment of an anaerobic digestion treatment of excess sludge and pig slurry
Vilarroig Herrera, José; Martinez Cuenca, Raul; Zuriaga-Agustí, Elena; Torró Cueco, Salvador Francisco; chiva, sergio Wiley (2020)The use of hydrodynamic cavitation (HC) as a wastewater treatment and anaerobic digestion pretreatment is a well‐known process. However, most of the experiments have been done at laboratory scale and using a low concentration ... -
Development and validation of a one-dimensional solver in a CFD platform for boiling flows in bubbly regimes
Gómez Zarzuela, C.; Peña Monferrer, Carlos; chiva, sergio; Miró, R. Elsevier (2021)This paper presents a new one-dimensional solver for two-phase flow simulations where boiling is involved. The solver has been implemented within the OpenFOAM® platform. The basic formulation follows the Eulerian description ... -
Development of Conductivity Sensors for Multi-Phase Flow Local Measurements at the Polytechnic University of Valencia (UPV) and University Jaume I of Castellon (UJI)
Muñoz-Cobo, Jose-Luis; chiva, sergio; Méndez, Santos; Monrós Andreu, Guillem; Escrivá, A.; Cuadros, José Luis MDPI (2017)This paper describes all the procedures and methods currently used at UPV (Universitat Politécnica de Valencia) and UJI (University Jaume I) for the development and use of sensors for multi-phase flow analysis in vertical ... -
Evaluation of hydraulic mixing performance in a full-scale anaerobic digester with an external liquid recirculation system using CFD and experimental validation
Arnau Notari, Rosario; Climent, Javier; Martinez Cuenca, Raul; Rodríguez R., Jorge; chiva, sergio Elsevier Ltd. (2021-12-26)Anaerobic digestion (AD) has become an essential process for sludge treatment and its optimum performance is related to its mixing degree. In this study, a full-scale Anaerobic Digester (ADer) with an external recirculation ... -
Experimental and CFD evaluation of ozone efficacy against coronavirus and enteric virus contamination on public transport surfaces
Falcó, Irene; RANDAZZO, Walter; Sánchez, Gloria; Vilarroig Herrera, José; Climent, Javier; chiva, sergio; Chica, A.; Navarro-Laboulais, Javier Elsevier (2021-08-17)The limited information about the routes of the transmission of SARS-CoV-2 within the ongoing pandemic scenario mobilized the administration, industry and academy to develop sanitation and disinfection systems for public ... -
Hindered and compression solid settling functions – Sensor data collection, practical model identification and validation
Plosz, Benedek; Climent, Javier; Griffin, Christopher T.; chiva, sergio; Mukherjee, Rani; Penkarski-Rodon, Elena; Matthew, Clarke; Valverde Pérez, Borja Elsevier (2020-10-01)Secondary settling tanks (SSTs) are the most hydraulically sensitive unit operations in activated sludge water resource recovery facilities (WRRF). Mathematical models for predicting activated sludge solids settling ...