Publication

Rayleigh-Taylor instability under an inclined plane

Publications associées (23)

Beam radiation penetration in particle b e ds for heat transfer modeling of a centrifugal solar particle receiver

This article describes a study of beam radiation striking particle beds of randomly packed, spherical par-ticles. The current study is focused on concentrating solar power receivers which use solid particles as a heat transfer medium, but results are appli ...

PERGAMON-ELSEVIER SCIENCE LTD2023

Near-junction microfluidic cooling for high power-density GaN-on-Si electronics: A wafer, device, packaging, and system-level investigation

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Electrification of the energy section, from generation to end-use, plays an essential role in reducing global CO2 emission. Innovations in power electronics are required to increase conversion efficiency and power density. Gallium nitride (GaN) transistors ...

EPFL2022

Heat recovery potential from ventilated passive and active facades

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A ventilated air-space behind external claddings can potentially affect the thermal performance of the entire building structure. In particular, in the Building Integrated Photovoltaic (BIPV) facades, ventilated cavities are typically present between the P ...

TU Delft OPEN2022

Flow boiling heat transfer and two-phase flow phenomena of CO2 in macro-and micro-channel evaporators: Fundamentals, applications and engineering design

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The paper presents a comprehensive review of fundamentals and engineering applications of CO2 flow boiling heat transfer, flow patterns and two-phase pressure drops in macro- and micro-channel evaporators. First, distinctions of macro- and micro-channels a ...

PERGAMON-ELSEVIER SCIENCE LTD2021

Instability of a thin viscous film flowing under an inclined substrate: the emergence and stability of rivulets

Gioele Mariano Nicolò Balestra, François Gallaire, Gaëtan Pierre Clément Lerisson, Pier Giuseppe Ledda

We study the pattern formation of a thin film flowing under an inclined planar substrate. The phenomenon is studied in the context of the Rayleigh-Taylor instability using the lubrication equation. Inspired by experimental observations, we numerically stud ...

Cambridge University Press2020

Pressure Drop and Convective Heat Transfer in Different SiSiC Structures Fabricated by Indirect Additive Manufacturing

Sophia Haussener, Maurizio Barbato, Ehsan Rezaei, Alberto Ortona

The microstructure of porous materials has a significant effect on their transport properties. Engineered cellular ceramics can be designed to exhibit properties at will, thanks to the advances in additive manufacturing. We investigated the heat and mass t ...

ASME2020

Self-Heating Aware Design of ICs in Deep Sub-Micron FDSOI and Bulk Technologies

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Bulk CMOS technologies left the semiconductor market to the novel device geometries such as FDSOI and FinFET below 30 nm, mainly due to their insufficient electrical characteristics arising from different physical limitations. These innovative solutions en ...

EPFL2018

An updated three-zone heat transfer model for slug flow boiling in microchannels

John Richard Thome, Mirco Magnini

This work proposes a novel physics-based model for the fluid mechanics and heat transfer associated with slug flow boiling in horizontal circular microchannels to update the widely used three-zone model of Thome et al. (2004). The heat transfer model has a ...

Pergamon-Elsevier Science Ltd2017

Operational regimes in a closed loop pulsating heat pipe

John Richard Thome, Navid Borhani, Giulia Spinato

Synchronized thermal and visual investigation was carried out on a single-turn channel CLPHP using R245fa as the worldng fluid. The tests were carried out at filling ratios from 10 to 90% and heat inputs from 2 to 60 W for vertical and inclined orientation ...

Elsevier France-Editions Scientifiques Medicales Elsevier2016

Determination of crystal growth rates during rapid solidification of polycrystalline aluminum by nano-scale spatio-temporal resolution in situ transmission electron microscopy

Thomas La Grange

In situ investigations of rapid solidification in polycrystalline Al thin films were conducted using nano-scale spatio-temporal resolution dynamic transmission electron microscopy. Differences in crystal growth rates and asymmetries in melt pool developmen ...

Amer Inst Physics2016

A CFD study of the parameters influencing heat transfer in microchannel slug flow boiling

John Richard Thome, Mirco Magnini

Boiling heat transfer in microchannels has been investigated extensively in the last two decades. However, most results from independent experimental studies display a substantial disagreement on the influence of the flow conditions and mechanisms on the h ...

Elsevier France-Editions Scientifiques Medicales Elsevier2016

A study of gravitational effects on single elongated vapor bubbles

John Richard Thome, Mirco Magnini

An experimental study was completed on the heat transfer induced by a single elongated vapor bubble rising in vertical, upward, co-current flow at various accelerations. The bubble shape and behavior were also studied under those conditions. Tests were con ...

Pergamon-Elsevier Science Ltd2016

Study of physical phenomena of selective laser melting towards increased productivity

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This thesis presents an experimentally focused study of three of the key physical phenomena of the Selective Laser Melting (SLM) process. The SLM process increasingly gains momentum in industrial applications. As awareness of the process and its capabiliti ...

EPFL2015

Thermo-Hydrodynamics in a Closed Loop Pulsating Heat Pipe

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Pulsating heat pipes (PHPs) represent a promising solution for passive on-chip, two-phase cooling of micro-electronics, providing advantages such as a simple construction and operation in any gravitational orientation. Unfortunately, the unique coupling of ...

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Experimental and numerical characterisation of heat flow during flame cutting of thick steel plates

Jean-Marie Drezet, Jean-Paul Lebet, Raphaël Thiébaud

Temperatures measurements during flame cutting of a thick steel plate and measurements of the extension of the fusion and heat affected zones and Vickers hardness after cutting have been performed. Additionally, a 3-D thermal model for simulation of flame- ...

Elsevier2014

Thermal Boundary Conductance between metals and dielectrics

Christian Monachon

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Experimental and numerical investigation of narrow impingement cooling channels

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Impingement cooling effectiveness of gas turbine vanes and blades can be further increased due to the manufacturing feasibility of integrally cast airfoils which can provide narrow impingement cooling cavities. This study examines experimentally using the ...

Elsevier2013

Electrothermal Finite-Element Modeling for Defect Characterization in Thin-Film Silicon Solar Modules

Christophe Ballif, Mathias Bonmarin, Michael Elias Stückelberger, Thomas Andreas Lanz, Beat Ruhstaller, Christian Frédéric Schlumpf

We present and validate a finite-element model for coupled charge and heat transport in monolithically interconnected thin-film solar modules. Using measured current-voltage (I-V) and lock-in thermography (LIT) measurements of amorphous silicon minimodules ...

Institute of Electrical and Electronics Engineers2013

Numerical investigation of hydrodynamics and heat transfer of elongated bubbles during flow boiling in a microchannel

John Richard Thome, Mirco Magnini

Flow boiling within microchannels has been explored intensively in the last decade due to their capability to remove high heat fluxes from microelectronic devices. However, the contribution of experiments to the understanding of the local features of the f ...

Elsevier2013

Diamond overgrown InAlN/GaN HEMT

Jean-François Carlin, Nicolas Grandjean

In this work the technology and characterization of nanocrystalline diamond (NCD) films directly grown on InAlN/GaN HEMTs is presented. Optimization of GaN based HEMT process steps including metallization stacks is discussed. A fully processed InAlN/GaN HE ...

2011