M. Diaz-Viera, D. Lopez-Falcon, A. Moctezuma-Berthier, and A. Ortiz-Tapia
Instituto Mexicano del Petroleo, México D.F., Mexico
The aim of the present work is to implement in COMSOL Multiphysics a multiphase fluid flow model in porous media, also known in the oil reservoir engineering literature as a black oil model, using a standard finite element approach. In particular, we are interested to apply this model coupled with a multiphase, multicomponent transport model to study Enhanced Oil Recovery processes at laboratory ...
Simulation of Chemotractant Gradients in Microfluidic Channels to Study Cell Migration Mechanism in Silico
P. Wallin, E. Bernson, J. Gold
Chalmers University of Technology, Applied Physics, Biological Physics, Gothenburg, Sweden
Cell migration of endothelial cells along gradients is an important process in vivo and an interesting target for cancer therapeutics. Microfluidics offer very powerful tools to study such migration processes in detail in the lab. In this study, we describe a model to simulate molecular gradients in a diffusion based microfluidic gradient generator and how a cell senses these gradients via cell ...
China University of Petroleum, Research Center for Oil & Gas Flow in Reservoir, Qingdao City, China
Modeling Two-phase flow through strongly heterogeneous porous media is of importance in many disciplines including petroleum industry, hydrology etc. There are, however, still some challenges in numerical simulation of such flow problems especially the flows in fractured porous media and fractured vuggy porous media. The aim of this report is to implement in COMSOL Multiphysics a two-phase fluid ...
F. Roger, and A. Traidia
ENSTA Paristech, Paris, France
AREVA NP, Saint Marcel, France
The prediction of mechanical response of assemblies during arc welding necessitates the knowledge of thermal history of the components and the constitutive behavior of the materials. COMSOL can simulate thermal and structural interaction but it needs to evaluate the time evolution of internal variables like viscoplastic strain and hardening parameters. In the present paper we extend the ...
Charles Stark Draper Laboratory
Micromechanical resonators are used in a wide variety of applications, including inertial sensing, chemical and biological sensing, acoustic sensing, and microwave transceivers. Despite the distinct design requirements for each of these applications, a ubiquitous resonator performance parameter emerges. This is the resonator’s Quality factor (Q), which describes the mechanical energy damping. ...
Transport, Growth, Decay and Sorption of Microorganisms and Nutrients through Porous Media: A Simulation with COMSOL
D. Lopez-Falcon, M. Diaz-Viera, and A. Ortiz-Tapia
Instituto Mexicano del Petroleo, México D.F., Mexico
Transport of microorganisms through porous media governs many phenomena in bioremediation of environmental pollution problems and microbial enhanced oil recovery. The aim of this work is to investigate the effects of some transport parameters on breakthrough curves as well as on spatial distribution of components transported through a porous medium by a fluid phase. Using COMSOL Multiphysics and ...
Screening Effects in Probing the Electric Double Layer by Scanning Electrochemical Potential Microscopy
R.F. Hamou, P.U. Biedermann, A. Erbe, and M. Rohwerder
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
A computational method is developed to study probing the electric double layer by Scanning Electrochemical Potential Microscopy. The model is based on a modified Poisson- Boltzmann equation, which takes into account steric effects. We investigated the effect of metallic apex protrusion and the Open Circuit Potential (OCP) of the tip on the probed potential. A clear electrostatic screening effect ...
M. Dimaki, J. Moresco Lange, P. Vazquez, P. Shah, F. Okkels, and W. Svendsen
Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark
The need for fast, easy and cost-effective analysis of blood samples as well as our understanding of the functionality of cells and neurons are two rather pressing issues in the modern world. Both of these can be addressed by functional lab-on-a-chip systems, which have been designed and optimized for specific analyses. This paper deals with the design of several different systems for cell ...
National Central University
This presentation considers the analysis of electroosmotic flow in porous media. Electroosmotic flow is a flow that occurs in microchannels, and is driven by the effect of an electric double layer at the solid-fluid interface. Electroosmotic flow has already been widely utilized in biomedical/biochemical applications to transport, separate and control fluids and samples. This presentation ...
Simulation of Optical Properties of the Si/SiO2/Al Interface at the Rear of Industrially Fabricated Si Solar Cells
Y. Yang, and P. Altermatt[1,2]
Institute for Solar Energy Research Hamelin (ISFH), Emmerthal, Germany
Dep. Solar Energy Research, Inst. Solid-State Physics, Leibniz University of Hanover, Germany
The specular and diffuse reflection properties of sunlight at the rear surface of silicon solar cells with various degrees of roughness are computed by solving the Maxwell and material equations in two dimensions, using the COMSOL RF Module. The model is tested on planar Si/SiO2/air interfaces and planar Si/SiO2/Al interfaces. The simulations show that for wavelengths of 800 nm, (i) maximum ...