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.

Design and Simulation of MEMS Micro Heater for DNA Amplification

D. Sharma [1], A. Siddiqua [1],
[1] Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India

PCR (Polymerase Chain Reaction) is a recent well researched technique which can be employed to obtain an amplified DNA (Deoxyribonucleic Acid). A continuous flow polymerase chain reaction with integrated MEMS based design micro heater for DNA amplification is implemented. Temperature zone is obtained by natural heat conduction rather than making use of typical silicon thermal cycler. Inter ...

Reduction of Fluid Forces on a Square Cylinder Using Passive Control Methods

A. Alshayji [1], A. Abograis [1]
[1]Kuwait University, Kuwait City, Kuwait

COMSOL Multiphysics® is used in this study to simulate the flow around a square cylinder and focus on reducing the forces on the cylinder by passive control methods. Numerical simulations are made to find optimum cases of control methods that guarantee maximum reduction for Reynolds number 160 based on the width of the square cylinder (W) and the inlet flow velocity (U_in). The selection of the ...

Keyhole Behavior During Spot Laser Welding

V. Bruyere [1], C. Touvrey [2], P. Namy [1]
[1] SIMTEC, Grenoble, France
[2] CEA DAM, Is-sur-Tille, France

The formation of porosities in spot laser welding depends on complex thermo-hydraulic phenomena. To understand and control these mechanisms, the COMSOL Multiphysics® software is used to model both the interaction and cooling stages of an isolated impact made with a Nd:YAG pulsed laser. The model is based on the Phase Field method in order to apprehend the evolution of the liquid-gas interface ...

Multiscale Resin Impregnation Modeling in a Bidirectional Composite Laminate

G. Salkar [1], B. Kr Mishra [1], M. Jayaraman [1], S. Manian [1]
[1] National Centre for Aerospace Innovation and Research, Mumbai, India

Resin Transfer Molding (RTM), is a closed mold reinforced polymer composite molding process where the resin is infused under a pressure gradient. The liquid resin is infused through the dry preform and displaces air to saturate the preform. One of the governing parameters in an RTM process is the inlet pressure; the flow of the resin differs depending on the pressure used. The dual-scale porous ...

Simulation of the Flow of an Autonomous Spherical Ball inside a Pipeline

W. Chalgham [1], A. C. Seibi [1], M. Mokhtari [1],
[1] University of Louisiana at Lafayette, Lafayette, LA, USA

One of the limitations of pipelines performance and structural integrity assessment is the continuous inspection of possible leaks due to corrosion or other types of failure mechanisms. Efforts to develop new technologies started several decades ago where different inspection techniques were used to enhance pipelines structural integrity. However, although available technologies present some ...

A COMSOL Multiphysics®-based Model for Simulation of Methane-Hydrate Dissociation by Injection of Superheated Carbon Dioxide

M. Gharasoo[1], C. Deusner[1], N. Bigalke[1], M. Haeckel[1]
[1]Department of Marine Geosystems, GEOMAR - Helmholtz Centre for Ocean Research, Kiel, Germany

Immense amounts of methane are stored as gas-hydrate deposits in deep layers of marine sediments. This has raised considerable interest to develop strategies for producing natural gas from marine hydrates. One potential production strategy is the injection of supercritical CO2 into methane hydrate-bearing sand layers to release the CH4 as a gas and sequester the CO2 as hydrate. We used COMSOL ...

Simulating Forced Convection in a Bingham Plastic Fluid

E. Tejaswini [1], B. Sreenivasulu [1], B. Srinivas [1],
[1]Gayatri Vidya Parishad College of Engineering, Visakhapatnam, Andhra Pradesh, India

In this work, the heat transfer characteristics of two heated cylinders of square cross-section immersed in a streaming Bingham plastic medium have been studied. The governing differential equations (continuity, momentum and thermal energy) have been solved numerically over wide range of conditions as: plastic Reynolds number, 0.1 ≤ Re ≤ 40, Prandtl number, 1 ≤ Pr ≤ 100, Bingham number, 0 ≤ Bn ≤ ...

Simulation of an Impulse Arc Discharge in Line Lightning Protection Devices

A. Chusov [1], E. Rodikova [2], D. Belko [1],
[1] Streamer Electric Inc., Saint Petersburg, Russia
[2] Streamer Electric Inc. and Saint Petersburg State University, St. Petersburg, Russia

Line lightning protection devices (LLPD) nowadays are widely used for lightning protection of overhead power lines. LLPD is composed of electrodes in series embedded in silicone rubber which all together forms sequence of spark gaps. When lightning overvoltage is applied it causes electrical breakdown in every spark gap. From this point spark gap starts to operate as discharge chamber, ...

Numerical Study of Microscale Heat Sinks Using Different Shapes and Fluids

H. Garg[1], A. K. Lall[2], Nidhi[3], V. S. Negi[1]
[1]Central Scientific Instruments Organisation, Chandigarh, India
[2]PEC University of Technology, Chandigarh, India
[3]UIET, Punjab University, Chandigarh, India

Microchannel heat sinks designed for applications in electronic cooling and having microscale heat transfer combine the attributes of high material compatibility, high surface area per unit volume ratios, and large potential heat transfer performance with a highly sophisticated and economic fabrication process. The present study deals with different microchannel shapes and different properties ...

Cooling and Hardening during Injection Molding of Field Joint Coatings for Deep Sea Pipelines

L. Van Lokeren [1], R. Verhelle [1], S. Loulidi [1], H. Boyd [2], G. Ridolfi [2], G. Van Assche [1]
[1] Vrije Universiteit Brussel, Brussels, Belgium
[2] Heerema Marine Contractors, Leiden, The Netherlands

A multilayer polymer coating is applied to carbon steel pipelines installed in the sea to protect against corrosion and to insulate to maintain the temperature. For field joint coatings, both thermosets (like polyurethane) and semi-crystalline thermoplastics (like polypropylene) are commonly used. To predict the temperature and crystallinity or conversion of the polymer during the cooling ...