Technical Papers and Presentations

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.

Two-Dimensional COMSOL Simulation of Heavy-Oil Recovery by Electromagnetic Heating

M. Carrizales[1], and L.W. Lake[1]

[1]The University of Texas at Austin, University Station, Austin, Texas, USA

Introducing heat to the formation has proven to be an effective way of lowering the oil viscosity of heavy oils by raising the temperature in the formation. The application of electrical energy has gained more interest during the last decade because it offers fewer restrictions for its successful application compared to the conventional steam flooding methods. Although this recovery technique ...

Modeling of Fluid-Mechanical Instability in Pure-Mercury HID Lamps

T. D. Dreeben
OSRAM SYLVANIA, Beverly, MA, USA

A fully unsteady compressible 2D flow model is used to reproduce observed fluid-mechanical arc instability in a horizontally-running pure-mercury HID lamp. The model represents a 2D lamp cross section normal to the arc, and assumes an infinitely long lamp. Departure from the steady condition is driven by oscillating lamp current. Sound-wave propagation and induced flows result from full coupling ...

Numerical Simulations of Magnetic Nanoparticle Suspensions as Interactive MRI Contrast Agents

P. Cantillon-Murphy1, E. Adalsteinsson1,2, and M. Zahn1

1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
2MIT Division of Health Sciences and Technology, Cambridge, MA, USA

The application of ferrofluid suspensions has become increasingly important in biomedicine with the development of SPIO contrast agents in magnetic resonance imaging (MRI).This work explores the application of established ferrohydrodynamic theory to the field of MR imaging with the intention of using the characteristic ferrofluid spin-velocity as a source of image contrast in MRI.A particular ...

Optimization of a Multiphysic Device – A Comparison of a Finite-Element- and a Equation-based Simulation

M. Jungwirth, and B. Hansbauer
University of Applied Sciences
Wels, Austria

To avoid overheating and malfunction of an electrical system it is necessary to optimize the power-loss of each component. The power dissipation mostly depends on multiple physical effects and therefore optimization is not an easy task. In this paper we focus on the reduction of complexity employing a equation-based simulation and compare it with a Finite-Element (FE) simulation in the ...

Design of a Microreactor for Microwave Organic Synthesis through Microwave Heating Simulations

W. H. Lee[1], K. Jensen[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

We will present the issues of a microreactor setup designed for microwave organic synthesis and demonstrate how COMSOL Multiphysics® is used to understand the mechanism of microwave heating and improve the microreactor design. The RF Module was used for the electromagnetics and solid heat transfer simulations of a CEM Discover microwave unit, while the Heat Transfer and CFD Modules were used the ...

Application of COMSOL Multiphysics® Pipe Flow Module to Develop a High Flux Isotope Reactor (HFIR) System Loop Model

P. K. Jain[1], D. Wang[1], J. D. Freels[1]
[1]Oak Ridge National Laboratory, Oak Ridge, TN, USA

Oak Ridge National Laboratory’s High Flux Isotope Reactor (HFIR) is the highest flux reactor-based source of neutrons for research in the United States. Thermal and cold neutrons produced by HFIR are used to study physics, chemistry, material science, engineering, and biology. Currently, RELAP5 code is the primary transient safety analysis tool used to perform thermal-hydraulic system safety ...

Structural Mechanics for Real Geometry of Basalt Woven Composites

J. Salacova[1]
[1]Technical university of Liberec, Department of Material Engineering, Liberec, Czech Republic

Woven composites with basalt reinforcement plain 1x1 are examined to define structural mechanics. Woven composites were created by the prepreg technology, 8 layers of plain-weave basalt fabrics were saturated by the precursor, polysiloxane matrix Lukosil®, and joint pressed during temperatures of 200°C and 600°C. The yarns consist of 8000 fibres assembled without twisting. Voids complete ...

Numerical Investigation for the Effect of Guide Panel on Heat Transfer from Steel Containment

Priyanshu Goyal[1], I. Thangamani[1], V. Verma[1], V.M. Shanware[1], R. K. Singh[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

In a nuclear reactor, the containment is the last barrier for the release of radioactivity during severe accident conditions. Containment material can be concrete or steel or steel-lined concrete. Steel containments have a high load bearing capacity and a high degree of leak tightness at higher pressures. In case of a severe accident, heat can be removed from the containment by a guide panel, ...

Modeling and Simulation of Membrane Contactor Employed to Strip CO2 from Rich Solvents via COMSOL Multiphysics®

N. Ghasem[1], M. Al-Marzouqi[1], N. A. Rahim[1]
[1]United Arab Emirates University, Al-Ain, United Arab Emirates

A mathematical model is developed for the stripping of CO2 from rich solvent. The rich solvent (aqueous NaOH) is used in CO2 absorption from natural gas through gas-liquid hollow fiber membrane contactor. The polyvinylidene fluoride (PVDF) hollow fiber membrane was fabricated via thermally induced phase separation techniques. COMSOL Multiphysics software package is used in solving the set of ...

Design of Arrayed Micro-Structures to get Super-Hydrophobic Surface for Single Droplet and Bulk Flow Conditions

A. Mall[1], P. R. Jelia[1], A. Agrawal[1], R. K. Singh[1], and S. S. Joshi[1]

[1] Department of Mechanical Engineering, Indian Institute of Technology Bombay, Maharashtra, India

Surfaces with water contact angle greater than 150º are super-hydrophobic in nature and possess extraordinary water repelling properties. Various researches on wettability of textured surfaces in recent years have shown that texturing surfaces with micron-sized and nanosized patterns improves their hydrophobicity to a great extent. This report aims at optimizing the dimensions of ...

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