Listar EMC_Articles por autoría "47f0c34f-c83f-45f8-a25e-c2193eb64a56"
Mostrando ítems 1-20 de 24
-
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 ... -
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 ... -
Convective heat transfer modelling in dry-running polymer spur gears
Roda-Casanova, Victor; Sanchez-Marin, Francisco; Martinez Cuenca, Raul Elsevier (2022-11-16)Heat convection is an important phenomenon in the process of cooling polymer spur gears running in dry conditions, which ultimately affects the strength of the gears. In order to gain some insight into this phenomenon, a ... -
Convective heat transfer performance of thermal oil-based nanofluids in a high-temperature thermohydraulic loop
Gil Font, Javier; Navarrete Argilés, Nuria; Cervantes Calvo, Estefanía; Mondragon, Rosa; Torró Cueco, Salvador Francisco; Martinez Cuenca, Raul; Hernandez, Leonor Elsevier Masson SAS (2021-09-08)Enhancing the performance of heat transfer fluids (HTF) is a key target for improving the efficiency of many industrial processes. Employing nanofluids for this purpose, by dispersing nanoparticles into the initial HTF to ... -
Correct interpretation of nanofluid convective heat transfer
Buschmann, Matthias; Azizian, R.; Kempe, T.; Juliá Bolívar, José Enrique; Martinez Cuenca, Raul; Sundén, B.; Wu, Z.; Seppälä, A.; Ala-Nissila, T. Elsevier (2018-04)Engineers and scientist have a long tradition in trying to improve the thermophysical properties of convective heat carriers such as water and transformer oil. Technological developments of the last decades allow the ... -
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 ... -
Dispersion management in two-photon microscopy by using diffractive optical elements
Mendoza-Yero, Omel; Pérez Vizcaíno, Jorge; Mínguez-Vega, Gladys; Martinez Cuenca, Raul; Andrés, Pedro; Lancis, Jesús Optical Society of America (2013)We demonstrate efficient generation of wide-field fluorescence signals in two-photon microscopy exploiting diffractive optical elements and short pulses by using a dispersion-compensated beam delivery optics module. ... -
Enhanced field-of-view integral imaging display using multi-Köhler illumination
Tolosa, Ángel; Martinez Cuenca, Raul; Navarro, Héctor; Saavedra, Genaro; Martínez Corral, Manuel; Javidi, Bahram; Pons Martí, Amparo Optical Society of America (2014)A common drawback in 3D integral imaging displays is the appearance of pseudoimages beyond the viewing angle. These pseudoimages appear when the light rays coming from each elemental image are not passing through the ... -
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 study of critical heat flux in flow boiling under subatmospheric pressure in a vertical square channel
Colgan, Nathan; Bottini, Joseph L.; Martinez Cuenca, Raul; Brooks, Caleb S. Elsevier (2019-03)Critical Heat Flux (CHF) is the maximal limit of heat flux in two-phase nucleate boiling heat transfer; therefore, an understanding of CHF under a wide range of conditions is important for safe system operation. In this ... -
Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator
Pérez Vizcaíno, Jorge; Mendoza-Yero, Omel; Martinez Cuenca, Raul; Martínez-León, Lluís; Tajahuerce, Enrique; Lancis, Jesús Institute of Electrical and Electronics Engineers (2012)In contrast to the mechanical scanning procedure described in the standard ISO/DIS 11146, the use of electronically tunable focal length lenses has proved its capability for the measurement of the laser beam propagation ... -
Increment of specific heat capacity of solar salt with SiO2 nanoparticles
Andreu Cabedo, Patricia; Mondragon, Rosa; Hernandez, Leonor; Martinez Cuenca, Raul; Cabedo, Luis Springer (2014)Thermal energy storage (TES) is extremely important in concentrated solar power (CSP) plants since it represents the main difference and advantage of CSP plants with respect to other renewable energy sources such as wind, ... -
Local parameters of air–water two-phase flow at a vertical T-junction
Monrós, Guillem; Martinez Cuenca, Raul; Torró Cueco, Salvador Francisco; chiva, sergio Elsevier (2017)Significant experimental work and modeling about vertical T-junction as a phase separator has been done for churn and annular flows, but a survey on the literature reveals a lack of experimental data regarding bubbly flow ... -
Modeling of wastewater treatment processes with hydrosludge
Iserte, Sergio; Carratalà Mezquita, Pablo; Arnau Notari, Rosario; Martinez Cuenca, Raul; Barreda-Juan, Paloma; Basiero, Luís; Climent, Javier; chiva, sergio Wiley (2021-11-09)The pressure for Water Resource Recovery Facilities (WRRF) operators to efficiently treat wastewater is greater than ever because of the water crisis, produced by the climate change effects and more restrictive regulations. ... -
New coloured coatings to enhance silica sand absorbance for direct particle solar receiver applications
Gimeno Furió, Alexandra; Hernandez, Leonor; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Cabedo, Luis; Barreneche, Camila; Iacob, Mihail Elsevier (2020-06-30)New systems using solid particles for solar energy capturing, heat transfer and thermal energy storage have been proposed and analysed in direct particle solar receivers. In this work, black coloured silica sand was ... -
Numerical investigation of models for drag, lift, wall lubrication and turbulent dispersion forces for the simulation of gas-liquid two-phase flow
Yamoah, Stephen; Martinez Cuenca, Raul; Monrós, Guillem; chiva, sergio; Macián-Juan, Rafael Elsevier (2015-06)In order to qualify CFD codes for accurate numerical predictions of transient evolution of flow regimes in a vertical gas–liquid two-phase flow in a pipe, suitable closure models (inter-phase forces) for the momentum ... -
Optical characterisation and photothermal conversion efficiency of a water-based carbon nanofluid for direct solar absorption applications.
Gimeno Furió, Alexandra; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Hernandez, Leonor Elsevier (2020-12-01)Carbon nanoparticles are very useful in solar thermal applications as they absorb much of the solar spectrum and can be inexpensive. Water-based carbon nanofluids with two different concentrations (3 and 33 mg l−1) were ... -
Photothermal properties and performance of hybrid carbon-paraffin/water emulsions
Burgos Rodríguez, Jorge; Mondragon, Rosa; Martinez Cuenca, Raul; Udayashankar, Nithiyanantham; Barison, Simona; mancin, simone; Fabregat-Santiago, Francisco; Hernandez, Leonor Elsevier (2023-10-09)Solar thermal energy has attracted renewed research interest for its excellent energy efficiency among different types of solar technologies. However, the limiting factor of them all is the intermittent nature of solar ...