Listar EMC_Articles por autoría "b1856924-62d6-4e9c-93fb-877d2abb6f8d"
Mostrando ítems 1-20 de 32
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Characterization of halloysite-water nanofluid for heat transfer applications
Alberola-Borràs, Jaume-Adrià; Mondragon, Rosa; Juliá Bolívar, José Enrique; Hernandez, Leonor; Cabedo, Luis Elsevier (2014-07-04)Nanofluids based on water with halloysite (Hal) nanotubes were prepared and characterized in order to evaluate its suitability to be used as a heat transfer fluid. A characterization of the Hal powder nanoparticles was ... -
Characterization of silica–water nanofluids dispersed with an ultrasound probe: A study of their physical properties and stability
Mondragon, Rosa; Juliá Bolívar, José Enrique; Barba-Juan, Antonio; Jarque Fonfría, Juan Carlos Elsevier (2012)The stability and agglomeration state of nanofluids are key parameters for their use in different applications. Silica nanofluids were prepared by dispersing the nanoparticles in distilled water using an ultrasonic probe, ... -
Characterization of Tin/Ethylene Glycol Solar Nanofluids Synthesized by Femtosecond Laser Radiation
Torres-Mendieta, Rafael; Mondragón Cazorla, Rosa; Puerto-Belda, Verónica; Mendoza-Yero, Omel; Lancis, Jesús; Juliá Bolívar, José Enrique; Mínguez-Vega, Gladys John Wiley & Sons, Ltd. (2016-11-22)Solar energy is available over wide geographical areas and its harnessing is becoming an essential tool to satisfy the ever-increasing demand for energy with minimal environmental impact. Solar nanofluids are a novel solar ... -
Colloidal stability of molten salt –based nanofluids: Dynamic Light Scattering tests at high temperature conditions
Navarrete Argilés, Nuria; Gimeno Furió, Alexandra; Forner Escrig, Josep; Juliá Bolívar, José Enrique; Mondragon, Rosa Elsevier (2019)The use of molten salt-based nanofluids as heat transfer fluids or thermal energy storage materials to increase the efficiency of Concentrated Solar Power plants has gained attention due to the use of the renewable ... -
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 ... -
Drift-flux model in a sub-channel of rod bundle geometry
Juliá Bolívar, José Enrique; Hibiki, Takashi; Ishii, M.; Yun, Byong-Jo; Park, Goon-Cherl Elsevier (2009)In view of the practical interest of the drift-flux model for two-phase flow analysis, the distribution parameter and drift velocity constitutive equations have been obtained for subcooled boiling flow in a sub-channel of ... -
Fabrication of gold nanoparticles in Therminol VP-1 by laser ablation and fragmentation with fs pulses
Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Cordoncillo, Eloisa; Lancis, Jesús; Mínguez-Vega, Gladys IOP Science (2014-10-22)This letter reports on a physical method to produce highly pure, size-controlled and well-dispersed spherical gold nanoparticles (NPs) in Therminol VP-1 by pulsed laser ablation in liquids (PLAL) using a 30 fs Ti:Sapphire ... -
Fabrication of high stable gold nanofluid by pulsed laser ablation in liquids
Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Lancis, Jesús; Mínguez-Vega, Gladys Copyright © 2015 VBRI Press (2015-11)Laser ablation in liquids by femtosecond radiation has been used to generate gold nanoparticles in a heat transfer fluid to produce a high stable thermal nanofluid as a heat transfer intensification technique. In oil based ... -
Flow regime development analysis in adiabatic upward two-phase flow in a vertical annulus
Juliá Bolívar, José Enrique; Ozar, Basar; Jeong, J.J.; Hibiki, Takashi; Ishii, M. Elsevier (2011)In this work radial and axial flow regime development in adiabatic upward air–water two-phase flow in a vertical annulus has been investigated. Local flow regimes have been identified using conductivity probes and neural ... -
Flow regime transition criteria for two-phase flow in a vertical annulus
Juliá Bolívar, José Enrique; Hibiki, Takashi Elsevier (2011)In this work, a new flow regime transition model is proposed for two-phase flows in a vertical annulus. Following previous works, the flow regimes considered are bubbly (B), slug (S) or cap-slug (CS), churn (C) and annular ... -
Flow structure of gas-liquid two-phase flow in an annulus
Ozar, Basar; Jeong, J.J.; Dixit, A.; Juliá Bolívar, José Enrique; Hibiki, Takashi; Ishii, M. Elsevier (2008)The flow structure of gas-liquid two-phase flow in vertical annulus channel has been investigated. The inner and outer diameters of the annular channel were 19.1 and 38.1 mm, respectively. The total height of the test ... -
Flow Structure of Subcooled Boiling Water Flow in a Subchannel of 3 x 3 Rod Bundles
Juliá Bolívar, José Enrique; Yun, Byong-Jo; Park, Goon-Cherl; Hibiki, Takashi Atomic Energy Society of Japan (2008)In this paper, the interfacial flow structure of subcooled water boiling flow in a subchannel of 3 x 3 rod bundles is presented. The 9 rods are positioned in a quadrangular assembly with a rod diameter of 8.2mm and a ... -
Influence of nanoparticle morphology and its dispersion ability regarding thermal properties of water used as phase change material
Barreneche, Camila; Mondragon, Rosa; Ventura Espinosa, David; Mata Martínez, Jose A; CABEZA, LUISA F.; Fernández, A. Inés; Juliá Bolívar, José Enrique (2018-01-05)Nanoparticles with different morphologies were added to water to study if the morphology of the nanoparticles affects the main parameters of water used as phase change material (PCM). Considered morphologies were spherical, ... -
Influence of Particle Size on the Drying Kinetics of Single Droplets Containing Mixtures of Nanoparticles and Microparticles: Modeling and Pilot-Scale Validation
Mondragon, Rosa; Juliá Bolívar, José Enrique; Hernandez, Leonor; Jarque Fonfría, Juan Carlos Taylor & Francis (2013-05-03)The particle size of the primary particles is an important parameter influencing the drying behavior of droplets. In this work, the influence of particle size on the drying kinetics and grain properties was analyzed for ... -
Influence of the particle size on the microstructure and mechanical properties of grains containing mixtures of nanoparticles and microparticles: Levitator tests and pilot-scaled validation
Mondragon, Rosa; Juliá Bolívar, José Enrique; Barba-Juan, Antonio; Jarque Fonfría, Juan Carlos Elsevier (2013)The spray drying process is used in many industrial applications. However, different grain properties can be desirable depending on the later use of the powders produced. In this work the influence of the particle size on ... -
Interfacial area transport of vertical upward air-water two-phase flow in an annulus channel
Jeong, J.J.; Ozar, Basar; Dixit, A.; Juliá Bolívar, José Enrique; Hibiki, Takashi; Ishii, M. Elsevier (2008)An experimental study on the interfacial area transport (IAT) of vertical, upward, air-water two-phase flows in an annulus channel has been conducted. The inner and outer diameters of the annular channel were 19.1 mm and ... -
Local flow regime analysis in vertical co-current downward two-phase flow
Juliá Bolívar, José Enrique; Liu, Y.; Hibiki, Takashi; Ishii, M. Elsevier (2013)In this work, both global and local flow regimes in two-phase downward flow in a 50.8 mm internal diameter pipe in adiabatic conditions have been identified. The bubble chord length distributions measured simultaneously ... -
Microstructure and mechanical properties of grains of silica nanofluids dried in an acoustic levitator
Mondragon, Rosa; Juliá Bolívar, José Enrique; Barba-Juan, Antonio; Jarque Fonfría, Juan Carlos Elsevier (2012)The microstructure and mechanical properties of spray-dried grains are key factors in many applications. In this work single droplets of silica nanofluids were dried in an acoustic levitator under different experimental ... -
Modeling of Drying Curves of Silica Nanofluid Droplets Dried in an Acoustic Levitator Using the Reaction Engineering Approach (REA) Model
Mondragon, Rosa; Juliá Bolívar, José Enrique; Hernandez, Leonor; Jarque Fonfría, Juan Carlos Taylor & Francis (2013)The use of nanoparticles has become of great interest in different industrial applications. The spray drying of nanofluids forms nanostructured grains, preserving the nanoparticle properties. In this work, individual ... -
New formulation and characterization of enhanced bulk-organic phase change materials
Palacios, Anabel; De Gracia, Álvaro; CABEZA, LUISA F.; Juliá Bolívar, José Enrique; Fernández, A. Inés; Barreneche, Camila (2018-02-14)The main drawbacks faced by researchers to successfully implement organic-PCM as materials to improve the thermal performance of building systems are their low thermal conductivity, their high flammability, and their low ...