Publications by Ricardo Lima | EPFL Graph Search

Related publications (13)

Ammonia two-phase flow in a horizontal smooth tube: Flow pattern observations, diabatic and adiabatic frictional pressure drops and assessment of prediction methods

John Richard Thome, Jesus Moreno Quiben, Ricardo Lima

The present study illustrates new experimental two-phase flow pattern observations together with diabatic boiling and adiabatic two-phase frictional pressure drop results for ammonia (R7117) flowing inside a 14-mm internal diameter, smooth horizontal stain ...

2009

Flow boiling in horizontal smooth tubes: New heat transfer results for R-134a at three saturation temperatures

John Richard Thome, Jesus Moreno Quiben, Ricardo Lima

The present study presents new flow boiling heat transfer results of R-134a flowing inside a 13.84 mm internal diameter, smooth horizontal copper tube. The heat transfer measurements were made over a wide range of test conditions: saturation temperatures o ...

2009

Modification of the Alfven wave spectrum by pellet injection

Yiming Li, Olivier Sauter, Richard Pitts, Ambrogio Fasoli, Basil Duval, Henri Weisen, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, Davide Galassi, Federico Alberto Alfredo Felici, Antonio José Pereira de Figueiredo, Cristian Sommariva, Jonathan Graves, Emiliano Fable, Francesca Maria Poli, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Daniele Brunetti, Anna Teplukhina, Hamish William Patten, Samuel Lanthaler, Haomin Sun, Soo-Jin Moon, Alberto Mariani, Michele Marin, Ricardo Lima

Alfven eigenmodes driven by energetic particles are routinely observed in tokamak plasmas. These modes consist of poloidal harmonics of shear Alfven waves coupled by inhomogeneity in the magnetic field. Further coupling is introduced by 3D inhomogeneities ...

IOP Publishing Ltd2019

Flow boiling in horizontal flattened tubes: Part II – Flow boiling heat transfer results and model

John Richard Thome, Jesus Moreno Quiben, Ricardo Lima

Experiments of flow boiling heat transfer were conducted in four horizontal flattened smooth copper tubes of two different heights of 2 and 3 mm. The equivalent diameters of the flattened tubes are 8.6, 7.17, 6.25, and 5.3 mm. The working fluids were R22 a ...

2009

COREDIV numerical simulation of high neutron rate JET-ILW DD pulses in view of extension to JET-ILW DT experiments

Yiming Li, Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Basil Duval, Henri Weisen, Richard Pitts, Javier García Hernández, Duccio Testa, Nicola Vianello, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, Davide Galassi, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Federico Alberto Alfredo Felici, Dalziel Joseph Wilson, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Antoine Pierre Emmanuel Alexis Merle, Francesca Maria Poli, Emiliano Fable, Daniele Brunetti, Anna Teplukhina, Haomin Sun, Soo-Jin Moon, Alberto Mariani, Michele Marin, Ricardo Lima

Two high performance JET-ILW pulses, pertaining to the 2016 experimental campaign, have been numerically simulated with the self-consistent code COREDIV with the aim of predicting the ELM-averaged power load to the target when extrapolated to DT plasmas. T ...

IOP Publishing Ltd2019

Overview of the JET preparation for deuterium-tritium operation with the ITER like-wall

Yiming Li, Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Basil Duval, Henri Weisen, Richard Pitts, Javier García Hernández, Duccio Testa, Nicola Vianello, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, Davide Galassi, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Federico Alberto Alfredo Felici, Dalziel Joseph Wilson, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Antoine Pierre Emmanuel Alexis Merle, Francesca Maria Poli, Emiliano Fable, Daniele Brunetti, Anna Teplukhina, Haomin Sun, Soo-Jin Moon, Alberto Mariani, Michele Marin, Karin Söderström, Ricardo Lima

For the past several years, the JET scientific programme (Pamela et al 2007 Fusion Eng. Des. 82 590) has been engaged in a multi-campaign effort, including experiments in D, H and T, leading up to 2020 and the first experiments with 50%/50% D-T mixtures si ...

IOP Publishing Ltd2019

Experimental and Visual Study on Flow Patterns and Pressure Drops in U-Tubes

Ricardo Lima

In single- and two-phase flow heat exchangers (in particular "coils"), besides the straight tubes there are also many singularities, in particular the 180° return bends (also called return bends or U-bends). However, contrary to the literature concerning p ...

EPFL2011

Two-Phase Pressure Drops in Adiabatic Horizontal Circular Smooth U-Bends and Contiguous Straight Pipes (RP-1444)

John Richard Thome, Ricardo Lima

Curved channels in the form of bends are encountered in many industrial two-phase flow applications, such as U-bends in air-conditioning and refrigeration evaporators and condensers. For engineering design purposes, the evaluation of the pressure loss in t ...

2010

Two-phase frictional pressure drops in U-bends and contiguous straight tubes for different refrigerants, orientations, tube, and bend diameters: Part 1. Experimental results (RP-1444)

John Richard Thome, Ricardo Lima

Over the years, much research has been conducted on two-phase flows in straight tubes because these tend, in length, to be predominant in two-phase systems. However, two-phase heat exchangers can also have singularity elements, where the most common type i ...

Taylor & Francis Inc2012

Two-phase flow patterns in U-bends and their contiguous straight tubes for different orientations, tube and bend diameters

John Richard Thome, Ricardo Lima

In two-phase systems there are many singularities in piping systems, one of which in particular are U-bends (also called 180 degrees return bends or U-tubes) found very often in air conditioning coils, refrigerant systems, etc. Contrary to the literature c ...

Elsevier2012

Flow boiling in horizontal flattened tubes: Part I – Two-phase frictional pressure drop results and model

John Richard Thome, Jesus Moreno Quiben, Ricardo Lima

Experiments of diabatic two-phase pressure drops in flow boiling were conducted in four horizontal flattened smooth copper tubes with two different heights of 2 and 3 mm. The equivalent diameters of the flat tubes are 8.6, 7.17. 6.25, and 5.3 mm. The worki ...

2009

Two-phase frictional pressure drops in U-bends and contiguous straight tubes for different refrigerants, orientations, tube, and bend diameters: Part 2. New models (RP-1444)

John Richard Thome, Ricardo Lima

In the first part of this article (Silva Lima and Thome 2012b), new experimental frictional pressure drop data in U-bends were presented and discussed. The experimental data were obtained for R410A and R134a at two saturation temperatures (5 degrees C and ...

Taylor & Francis Inc2012

TWO-PHASE FLOW AND BOILING OF AMMONIA IN HORIZONTAL SMOOTH TUBES

John Richard Thome, Ricardo Lima

The lecture will address our experimental work on observing flow patterns and measuring heat transfer coefficients and two-phase pressure drops for evaporating ammonia flows in a horizontal tube over a range of mass fluxes and saturation temperatures. Some ...

2011