D. Yuryev, M. Demkowicz 
Massachusetts Institute of Technology, Cambridge, MA, USA
We describe simulations performed in COMSOL Multiphysics® of the precipitation of helium (He) on solid-state interfaces. The non-uniform precipitation of He at certain interfaces is a result of a heterogeneous energy distribution in the interface plane: He wets high interface energy (“heliophilic”) regions but does not wet low interface energy (“heliophobic”) ones. Using a phase-field ...
C. Wylock, A. Rednikov, B. Haut, P. Colinet
Université Libre de Bruxelles (ULB), Transfers, Interfaces and Processes (TIPs), Brussels, Belgium
This work deals with the modeling and the numerical simulation of the CO2 absorption, coupled with a chemical reaction, in an initially quiescent aqueous solution of sodium carbonate (Na2CO3) and bicarbonate (NaHCO3), inside a Hele-Shaw cell. In our Hele-Shaw cell, the liquid fills partially the gap between two parallel transparent Plexiglas plates. CO2 is forced to flow above the liquid in the ...
M. Rühl, G. Dietrich, E. Pflug, S. Braun, A. Leson
TU Dresden, Laser and Surface Technology, Dresden, Germany
IWS Dresden, Fraunhofer Institute for Material and Beam Technology, Dresden, Germany
Established joining techniques like welding, soldering or brazing typically are characterized by a large amount of heat load of the components. Especially in the case of heat sensitive structures like MEMS this often results in stress induced deformation and degradation or even damaging of the parts. A back door of this problem are Reactive Multilayer Systems (RMS). These foils consist of several ...
J. Plawsky, A. Chatterjee, and P.C. Wayner Jr.
Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
The Constrained Vapor Bubble is a fundamental fluid mechanics experiment that is scheduled to run aboard the International Space Station starting in August 2009. The experiment is focused on looking at evaporation and condensation processes at the contact line, where vapor, liquid and solid meet. Our goal is to understand how processes that occur on the macroscale affect the transport processes ...
M. Divakaran, S. K. Gupta
Department of Chemical Engineering, Indian Institute of Science, Bangalore, Karnataka, India
Due to the coupling of foam flow with foam generation step, the earlier studies on foam flow have not led to consistent results. An increase in flow rate to obtain ?P vs. Q data changes the foam under investigation itself. The controlled experiments carried out earlier in our group show that ?P increases with flow rate as Q^2/3, a weaker dependence than that known for laminar flow or plug flow ...
N. Khoshnevis Gargar, A. Mailybaev, D. Marchesin, H. Bruining
 Delft University of Technology, Delft, The Netherlands
 Instituto Nacional de Matematica Pura e Aplicada, Rio de Janeiro, Brazil
One of the methods to recover oil from medium and low viscosity in complex reservoirs uses air injection leading to oil combustion. In this case the oxygen in the air burns the heavier components of the oil, generating a heat wave leading to vaporization of lighter components. The combustion mechanisms are different for light oils, where evaporation is dominant, whereas for medium non-volatile ...
Numerical modeling of coupled heat and mass transport during frying and cooling of wood in contact with oil
Grenier, D.1, 2, Bohuon, P.1, 3, Baillière, H.1, Ben Lalli, A., Méot, J.M.1
1 CIRAD, Montpellier cedex, France
2 CTBA, Bordeaux cedex, France
3 ENSIA, 1101, Montpellier cedex, France
This paper proposes a model of coupled heat and mass (water, oil) transport in a porous medium (timber) soaked first in a hot oil bath, then in a cold oil bath. The timber is soaked at hot temperature to dry it (water vaporization, resulting in increased pressure and therefore vapor transport) and at cold temperature to treat it (vapor condensation, resulting in decreased pressure and oil ...
COMSOL Modelling of the Gas Mixing Process in a Ripple Reducer for NPL’s Time Division Dilution System
J. Wang, B.A. Goody, and M.J.T. Milton
National Physical Laboratory, Teddington, Middlesex, UK
The mixing process of a ripple reducer designed for a time division dilution system (TDD) that dynamically generates calibration gas mixtures is modelled in 2D using COMSOL Multiphysics. The model can been used to visualize and optimize the mixing process and extract parameters of interest at chosen times and positions. The simulated time response of an analyte concentration agrees with ...
M. Quast and N.R. Lalic
Gunytronic GmbH, St Valentin, Germany
The sensor type developed by Gunytronic uses corona discharge for measuring flow rates in exhaust streams of automotives, aircrafts and industrial plants. This paper will present the development of testing equipment used in laboratory for investigating physical relations on corona currents, charged particle transport, the calculation of the collateral electric fields and high potentials. This ...
M. Chahardowli, R. Farajzadeh, J. Bruining
Department of Geotechnology, Delft University of Technology, Delft, The Netherlands
One of the main mechanisms in the secondary oil migration from the source rock into oil traps is gravity driven countercurrent imbibition. Many mathematical models describe countercurrent imbibition considering local equilibrium. However, Barenblatt proposed a model to describe the effect of non-equilibrium in oil water displacement. Here, the proposed model was implemented in a gravity driven ...