Exploració per tema "Two-phase flow"
Ara es mostren els items 16-35 de 53
-
CFD study of two-phase flows in hypergravity conditions with OpenFOAM
(Universitat Politècnica de Catalunya, 2019-07-11)
Treball Final de Grau
Accés obertAvui en dia ens trobem a l’epoca m ` es important de l’espai i de l’aire, lo qual ha portat a ´ que la tecnologia s’hagi vist obligada a desenvolupar-se fins al punt de poder ser utilitzada en condicions gravitacionals que ... -
Characterization of a 2.5 mm internal diameter T-junction and study of the effects of capillary contractions in two-phase flows
(Universitat Politècnica de Catalunya, 2012-11-15)
Treball Final de Grau
Accés restringit per decisió de l'autorThe performance of a 2.5mm bubble injector is studied and compared with previous results with thinner injectors. The behaviour of the generated two-phase flow in capillary contractions is analysed. -
Characterization of bubbly and slug flow regimes generated in a minichannel in microgravity conditions
(2009-09)
Text en actes de congrés
Accés obert -
Characterization of the performance of a minibubble generator in conditions relevant to microgravity
(2010-08-05)
Article
Accés obertWe perform a characterization of a recently reported minibubbles (bubbles with a diameter of the order of 10‐3 m) generator in microgravity related conditions. Generation of bubbles is based on the generation of a slug ... -
Comparison of Two Gas Injection Methods for Generating Bubbles in a T-Junction
(2020-05-28)
Article
Accés obertIn this work, we compare the performance of two different methods for generating bubbles in conditions relevant to microgravity. A T-junction formed by two cylindrical (1 mm of internal diameter) and perpendicular channels ... -
Direct numerical simulation of rising bubble with path instability
(2018)
Text en actes de congrés
Accés restringit per política de l'editorialPresent research is focused on combining High- Performance Computing (HPC) and Direct Numerical Simulation (DNS) of two-phase flows, to study the dy- namic behavior of rising bubble whit path instabilities with moderate/high ... -
DNS of thermocapillary migration of a bi-dispersed suspension of droplets
(Springer, 2023)
Text en actes de congrés
Accés restringit per política de l'editorialThe multiple markers unstructured conservative level-set method for two-phase flow with variable surface tension is applied in the Direct Numerical Simulation of thermocapillary-migration of a bi-dispersed suspension of ... -
Enhanced NAPL removal and mixing with engineered injection and extraction
(2022-04)
Article
Accés obertAquifer remediation with in-situ soil washing techniques and enhanced oil removal typically involves the injection of liquid solutions into the geological formation to displace and mobilize non-aqueous phase liquids (NAPLs). ... -
Estudio numérico del transporte de burbujas de helio en metal líquido aplicado a tecnología de fusión nuclear
(Universitat Politècnica de Catalunya, 2013-06)
Treball Final de Grau
Accés obertLa posibilidad de que exista nucleación de helio dentro de las envolturas regeneradoras de metal líquido no es remota. En caso de existir, las consecuencias en la eficiencia térmica del reactor y en el control de tritio ... -
Experimental analysis of bubble jets collision
(Universite Libre de Bruxelles, 2008-09)
Comunicació de congrés
Accés obert -
Experimental analysis of the bubble-slug transition in a minichannel in microgravity conditions
(ELGRA, 2009-09-01)
Comunicació de congrés
Accés obert -
Experimental observations of two-phase flow in rough-walled fractures
(Universitat Politècnica de Catalunya, 2014-06-06)
Projecte/Treball Final de Carrera
Accés obertThis thesis presents an experimental investigation about the concurrent ow of water-air in a rough walled fracture. The focus of this investigation is on studying the effects of varying the orientation or gravity factor ... -
Gravity-driven motion of a swarm of bubbles in a vertical pipe
(2015)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work, Direct Numerical Simulations of gravity-driven motion of a swarm of bubbles in a vertical pipe are presented. These simulations were carried out in the contex of a multiple marker level-set methodology, which ... -
High-order hybridizable discontinuous Galerkin formulation with fully implicit temporal schemes for the simulation of two-phase flow through porous media
(John Wiley & Sons, 2021-07-30)
Article
Accés obertWe present a memory-efficient high-order hybridizable discontinuous Galerkin (HDG) formulation coupled with high-order fully implicit Runge-Kutta schemes for immiscible and incompressible two-phase flow through porous ... -
Hybrid multi-scale model for partially saturated media based on a pore network approach and lattice Boltzmann method
(Elsevier, 2020-10)
Article
Accés obertA model combining the efficiency of the pore-network (PN) models and the accuracy of the lattice Boltzmann Method (LBM) is proposed. We introduce a multi-scale approach based on a decomposition of the granular assembly ... -
Low-frequency unsteadiness in the vortex formation region of a circular cylinder
(2013-08-23)
Article
Accés obertThe presence of low-frequency fluctuations in the wake of bluff bodies have been observed in several investigations. Even though the flow past a circular cylinder at Re = 3900 (Re = U ref D/ν) has been the object of several ... -
Modeling of gas migration through low-permeability clay rock using information on pressure and deformation from fast air injection tests
(2018-07)
Article
Accés obertThe characterization of gas migration through low-permeability clay formations has been a focus of R&D programs for radioactive waste disposal, which is also of great importance for shale gas exploration, cap-rock behavior ... -
Near-interface flow modeling in large-eddy simulation of two-phase turbulence
(2020-11-11)
Article
Accés obertThe smallest hydrodynamic length scales in two-phase turbulence are located at the interface between phases, or fluids, as a result of two-way coupling phenomena. Typically, these interface-generated scales are several ... -
Numerical and Experimental Study of the Squeezing-to-Dripping Transition in a T-Junction
(2020-05-26)
Article
Accés obertIn this work, we study the transition from squeezing to dripping during the formation of bubbles in a capillary T-junction in conditions relevant to microgravity. The junction is formed by two perpendicular cylinders of ... -
Numerical modelling of two-phase flow in fractured rock masses using zero-thickness interface elements
(International Centre for Numerical Methods in Engineering (CIMNE), 2021)
Text en actes de congrés
Accés obertIn recent years, the authors and co-workers have developed a 3D finite element model for coupled thermo-hydro-mechanical (THM) problems in fractured rock masses. Zero-thickness interface elements are used for taking into ...