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3D Phase-Field Simulation of Micropore Formation during Solidification: Morphological Analysis

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Splashing or not

John Martin Kolinski

The splashing of a droplet when impacting a solid surface is common to our everyday experience as well as to industrial applications that require controlled deposition of liquid mass. Still the mechanism for splashing is not well understood. A recent study ...

2011

MHD equilibrium and stability of tokamaks and RFP systems with 3D helical cores

Olivier Sauter, Jonathan Graves, Wilfred Anthony Cooper

Bifurcated magnetohydrodynamic (MHD) equilibrium states are computed for ITER hybrid scenario and RFX-mod SHAx configurations with very flat or reversed core magnetic shear conditions. In the ITER studies, the minimum inverse rotational transform qmin is n ...

IOP Publishing2011

Influence of anisotropy on heterogeneous nucleation

Michel Rappaz, Aurèle Mariaux

Heterogeneous nucleation is governed by the interplay of interfacial energies between a substrate, a solid and a liquid. Although the intensity of these energies can strongly change with the orientation of the nucleus for anisotropic media, this parameter ...

Elsevier2011

Lennard-Jones binary mixture in disordered matrices: exploring the mode coupling scenario at increasing confinement

Pascal Gallo

We present results of molecular dynamics simulations performed on a Lennard-Jones liquid binary mixture confined in matrices of soft spheres at increasing packing fraction. We study the dynamical properties of the liquid at a given density upon supercoolin ...

2011

Curvature of micropores in Al-Cu alloys: An X-ray tomography study

Michel Rappaz, Milan Felberbaum

Micropores formed in Al-Cu alloys cast under controlled conditions have been analyzed using high-resolution X-ray tomography. The influence of inoculation conditions, copper content, cooling rate and initial hydrogen content on the morphology of pores has ...

Elsevier2011

Porosity in Aluminum Alloys

Milan Felberbaum

Porosity is one of the major defects in castings because it reduces the mechanical properties of a cast piece [1]. Porosity formation results from the effect of two concomitant mechanisms, namely solidification shrinkage and segregation/precipitation of ga ...

EPFL2010

Geometrical Monte Carlo model of liquid-phase sintering

Aitor Luque Gomez

Liquid-phase sintering (LPS) is an industrial process used to consolidate materials composed of two different kinds of metallic and/or ceramic powders. At constant temperature, the amount of the present liquid-phase is constant. However, the shape of parti ...

Elsevier2010

Phase-field simulation of micropores constrained by a solid network

Alain Jacot, Milan Felberbaum, Hossein Meidani

A 2D phase-field model has been developed in order to describe the morphology of a pore forming within interdendritic liquid channels and the geometrical effect of mechanical contacts with neighboring solid. The distribution of the solid, liquid and gas ph ...

2009

Phase-field simulation of micropores constrained by a solid network

Alain Jacot, Milan Felberbaum, Hossein Meidani

Springer, Springer-Verlag2009

Novel tuning method for optofluidics

Demetri Psaltis, Wuzhou Song

We introduce a novel tuning mechanism for optofluidic devices by embedding pressure driven actuator inside microfluidic chips. Multiple tunable optofluidic devices remotely controlled by the pressure of air or liquid were demonstrated. ...

Ieee Service Center2009