Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Numerical Model for Leaching and Transporting Behavior of Radiocesium in MSW Landfill

H. Ishimori[1], K. Endo[2], H. Sakanakura[2], M. Yamada[2], M. Osako[2]
[1]Ritsumeikan University, Kusatsu, Shiga, Japan
[2]National Institute for Environmental Studies, Tsukuba, Ibaraki Prefecture, Japan

This paper presents the numerical simulation model for radiocesium leaching and transporting behavior in municipal solid waste (MSW) landfill and discusses on the design for the required geometry and properties of the impermeable final cover and the soil sorption layer, which work for containment of hazardous waste such as radiocesium-contaminated MSW generated by Fukushima Daiichi nuclear ...

iCP 1.0: Stable Release Version of the Interface COMSOL-PHREEQC - new

A. Nardi[1], L. M. deVries[1], A. Sainz[1], J. Molinero[1]
[1]Amphos 21 Consulting, Barcelona, Spain

iCP (Nardi et al, 2014) is a software that couples two standalone simulation programs: COMSOL Multiphysics® and PHREEQC (Parkhurst & Appelo, 2013). The tool is ideal for applying multiphysics and geochemistry in Earth Sciences. Flexibility of the two coupled codes result in an extensive list of modelling areas, offering good opportunities for R+D. The iCP 1.0 is the version of the ...

Coupling Miscible Flow and Geochemistry for Carbon Dioxide Flooding into North Sea Chalk Reservoir

B. Niu[1], W. Yan[1], A.A. Shapiro[1], and E.H. Stenby[1]

[1]Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

As an effective method to cope with green-house gas emission, and to enhance oil recovery, injection of carbon dioxide into oil reservoirs has obtained increasing attentions. The flooding process involves complex phase behavior among oil, brine and CO2, and geochemical reaction between CO2 and rock. COMSOL Multiphysics® was first applied to simulating two flooding processes with known ...

Three-Dimensional Percolation Properties Simulation of a Marine Coating Based on Its Real Structure Obtained from Ptychographic X-Ray Tomography - new

B. Chen[1], M. Guizar-Sicairos[2], G. Xiong[1], L. Shemilt[1], A. Diaz[2], J. Nutter[1], N. Burdet[1], S. Huo[1], F. Vergeer[3], A. Burgess[4], I. Robinson[1]
[1]London Centre for Nanotechnology, University College London, London, UK
[2]Paul Scherrer Institute, Villigen, Switzerland
[3]AkzoNobel Co. Ltd., Sassenheim, Netherlands
[4]AkzoNobel (UK) Co. Ltd., Tyne and Wear, UK

We present quantitative nano-scale analysis of the 3D spatial structure of an anticorrosive aluminium epoxy barrier marine coating obtained by ptychographic X-ray computed tomography (PXCT) [1-3]. We then use COMSOL Multiphysics® software to perform simulations on the acquired real 3D structure to demonstrate how percolation through this actual 3D structure impedes ion diffusion in the ...

Model Development and Implementation of a Membrane Shift Reactor

J. Völler[1], M. Follmann[1], C. Bayer[1], and T. Melin[1]

[1]AVT Chemical Process Engineering, RWTH Aachen University, Aachen, Germany

Low temperature fuel cells require hydrogen of high purity for electricity production to avoid catalyst poisoning. To purify hydrogenrich flue gases from hydrocarbon steam reforming membrane shift reactors with a metal membranes may be utilized. A model of a tubular membrane shift reactor with a hydrogenseparating palladium membrane is modeled in the COMSOL Multiphysics® Chemical Engineering ...

Modeling of a Biogas Steam Reforming Reactor for Solid Oxide Fuel Cell Systems

F. Cipitì[1]
[1]CNR-ITAE, Institute of Advanced Technologies for Energy, Messina, Italy

A biogas steam reforming reactor has been developed in order to be integrated into a proof-of-concept SOFC system, able to operate with biogas produced in an industrial waste water treatment unit. A mathematical model, aimed at describing the performance of the reactor, has been developed. The reactor is simplified and modeled as a non-isothermal plug flow reactor. The reactor is fed with a ...

Multiphase Porous Media Model for Microwave Drying Spherical Potatoes - new

H. Zhu[1], T. Gulati[2], K. Huang[1], A.K. Datta[2]
[1]Sichuan University, Chengdu, Sichuan, China
[2]Cornell University, Ithaca, NY, USA

Mathematical description of microwave drying requires the solution of two different physics: electromagnetics in the microwave oven cavity and food material and, transport process (mass, momentum and heat transport) in the food material. Maxwell’s equations for electromagnetics were solved using the RF Module using the GMRES iterative solver with the GeometricMultigrid preconditioner. Mass, ...

Efficiently Solving the Stochastic Reaction-Diffusion Master Equation in C++ with the COMSOL Multiphysics® Software

L. A. Widmer [1], J. Stelling [1],
[1] Department of Biosystems Science and Engineering, ETH Zürich and Swiss Institute of Bioinformatics, Basel, Switzerland

We demonstrate a simulation engine using COMSOL® and MATLAB® software that is able to simulate stochastic reaction-diffusion models in the reaction-diffusion master equation framework. We use this engine to construct models of budding yeast cells with embedded microtubules, interfacing stochastic microtubule dynamics with spatiotemporal signaling networks acting during mitosis. Our simulation ...

Modelling Waste Water Flow in Hollow Fibre Filters

I. Borsi[1] and A. Fasano[1]
[1]Dipartimento di Matematica U. Dini, Università di Firenze, Firenze, Italy

In this paper we present a model to describe the process of waste water filtration based on hollow-fibre membrane filters. In particular, we deal with membranes whose pores diameter is in the range 0.01-0.1 µm. The main problem in these filtering systems is the membrane fouling. The mathematical model consists in two equations for the Darcy's flow through the filter, coupled with an ...

Simulation and Design of a Microfluidic Respirometer for Semi-Continuous Amperometric Short Time Biochemical Oxygen Demand (BODST) Analysis

F.J. del Campo[1], A. Torrents[1], J. Mas[2], F.X. Muñoz[1]
[1]Instituto de Microelectronica de Barcelona, IMB-CNM (CSIC), Campus Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
[2]Departement de Genètica i Microbiologia, Campus Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain

Introduction: This work presents the design of a novel flow cell based miniaturized electrochemical respirometer to monitor organic content in water samples semi-continuously, in contrast to current Biochemical Oxygen Demand, BOD, methods. Simulation techniques has been used to parameterize and optimize aspects such as height and length of the channels, materials and thickness, flow and oxygen ...