Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Modeling of Non-isothermal Reacting Flow in Fluidized Bed Reactors - new

V. Orava [1], O. Souček [2], P. Cendula [1]
[1] Institute of Computational Physics, ZHAW, Winterthur, Switzerland
[2] Faculty of Mathematics and Physics, Charles University in Prague, Prague, Czech Republic

We investigate a prototype concept of a back-up electricity device where we use liquid formic acid (FA) to produce a mixture of carbon dioxide (CO2) and hydrogen (H2) which is used in a PEM fuel cell, Fig. 1. In the fluidized bed reactor the liquid FA is decomposed to a gaseous mixture of CO2 and H2 in the presence of microscopic floating solid catalytic particles. We describe the system, ...

Primary Current Distribution Model for Electrochemical Etching of Silicon through a Circular Opening - new

A. Ivanov [1], U. Mescheder [1],
[1] Hochschule Furtwangen University, Furtwangen im Schwarzwald, Germany

Primary current distribution model for anodization of low-doped p-type silicon through a circular opening in frontside insulating mask is developed. The model is applied in two regimes of the process – pore formation and electropolishing – by definition of current density dependent functions of porosity and dissolution valence based on experimental results. As found also experimentally, ...

Simulation of a Downsized FDM Nozzle - new

T. M. Hofstaetter [1],
[1] Vienna University of Technology, Vienna, Austria

This document discusses the simulation of a downsized nozzle for fused deposition modelling (FDM), namely the E3D HotEnd Extruder with manufactured diameters of 200-400 μm in the nozzle tip. The nozzle has been simulated in terms of heat transfer and fluid flowgiving an insight into the physical behavior of the polymer inside the nozzle. The extruder contains a nozzle, a heater block, a ...

Numerical Modeling of Solvent Enhanced Water Flooding - new

M. Chahardowli [1], R. Farajzadeh [2], H. Bruining [1],
[1] Delft University of Technology, Delft, The Netherlands
[2] Shell Global International Solutions, Den Haag, The Netherlands

Mutually soluble-solvents can improve the ultimate recovery in conventional reservoirs. Initially, the solvent moves with the imbibing aqueous phase into the reservoir. However, upon contact with oil, diffusion occurs and the solvent is transported in the oleic phase. Through the migration of the mutually soluble component from the aqueous phase into the oleic phase, oil properties and/or rock ...

Non-isothermal Flow of CO2 in Injection Wells: Evaluation of Different Injection Modes - new

O. Silva [1],
[1] Amphos 21 Consulting S.L., Barcelona, Spain

Injection conditions of CO2 at the wellhead may play a major role on the flow behavior through the wellbore. The density and the injection rate reached at the bottomhole are key factors affecting the performance and efficiency of CO2 geological storage. In this work, a model of non-isothermal flow of CO2 in injection wells is developed using COMSOL Multiphysics® software and used to assess ...

Radio Frequency Resonator for Continuous Monitoring of Microfluidic Droplet Size Dispersity - new

D. Conchouso [1], G. Mckerricher [1], D. Castro [1], A. Arevalo [1], I. G. Foulds [2]
[1] King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia
[2] School of Engineering, University of British Columbia - Okanagan, Vancouver, BC, Canada

Parallelization of droplet microfluidics is a challenging task because of the complex fluid mechanics coupling between parallel devices. Failure of few droplet generators can influence the size distribution of the final product and the correct operation of the neighbor devices. One of the typical causes of failure is channel clogging, in which one of the phases cannot flow through the ...

Design of an Anisokinetic Probe for Sampling Radioactive Particles from Ducts of Nuclear Facilities - new

P. Geraldini [1],
[1] Sogin Spa, Rome, Italy

The aim of this study is to design a new concept of shrouded probe that meets the ISO 2889 requirements and it is suitable for small-ducts installation. In order to reduce the construction costs they have been considered standard stainless steel welding fittings manufactured according to ASME/ANSI specifications. In particular, with the numerical simulations, they have been firstly evaluated ...

Quantification of Porosity Changes Due to Precipitation of Cement Materials with iCP - new

D. Sampietro [1], E. Abarca [1], M. Bayer [1], S. Jordana [1], J. Molinero [1], T. Tanaka [2], S. Hashimoto [2], T. Iwatsuki [3], H. Onoe [3], H. Saegusa [3]
[1] Amphos 21 Consulting, Barcelona, Spain
[2] Obayashi Corporation, Tokyo, Japan
[3] Japan Atomic Energy Agency, Gifu, Japan

The Japan Atomic Energy Agency (JAEA) is carrying out an URL (Underground Research Laboratory) project in Mizunami city, central Japan. The project is a purpose-built generic URL project that is planned for a scientific study of the deep geological environment in fractured crystalline rock as a basis of research and development for geological disposal of nuclear waste. The concrete material ...

Coupled Heat and Mass Transfer Model to Simulate Hygrothermal Behavior of Bio-Based Materials - new

M. Asli [1], F. Brachelet [1], A. Chauchois [1], E. Antczak [1]
[1] Université d'Artois, Béthune, France

This poster presents a numerical modeling approach for hygrothermal behavior of bio-based materials. The mathematical model describes the heat and moisture transfer through a wall of bio-based materials. The studied wall is subjected to both convective heat transfer and moisture flux transfer with the surroundings. Consequently, an optimal proposal can be suggested to attain the main objective, ...

Parametric Investigation of the Common Geometry Shapes for Added Mass Calculation - new

J. H. Lee [1], A. Koushesh [1],
[1] American University of Sharjah, United Arab Emirates

This work is aimed to demonstrate how variation of geometries' parameters would affect the fluid loading effect in water using COMSOL Multiphysics and compared with analytical data. When a structure is placed in water, the interaction between the water and the structure plays an important role in determining the amount of fluid loading mass. The calculated results of added mass of the common ...

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