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.

Numerical Modelling of Vortex Induced Vibrations  in Submarine Pipelines

F. Van den Abeele, J. Vande Voorde, and P. Goes
ArcelorMittal Research & Development Industry Gent, Zelzate, Belgium

Vortex-induced vibration is a major cause of fatigue failure in submarine oil and gas pipelines and steel catenary risers. Even moderate currents can induce vortex shedding. In this paper, COMSOL Multiphysics is applied to study the flow pattern around submarine pipeline spans, and predict the amplitude and frequency of the vortex induced vibrations. The sensitivity of the computational fluid ...

Modal Analysis of Elastic Ring Squeeze Film Damper for Small Gas Turbine Engines

S. Thennavarajan[1][2], P. Jeyaraj [1], L. P. Manikandan [2], S. S. Kulkarni [2], S. Jana [2],
[1]Department of Mechanical Engineering, NITK, Surathkal, Mangalore, Karnataka, India
[2]CSIR- National Aerospace Laboratories, Bengalore, Karnataka, India

The high speed gas turbine is a power plant developed for modern aircrafts. It is widely used and developed because it can meet the high power to weight ratio. The rotor system of modern small gas turbine works above the critical speeds. Hence, there is a stricter requirement for the control and isolation of vibration magnitude under heavy unbalance load and passing through critical speeds. An ...

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 ...

Validation of a CFD Study of Particle Distribution in Nuclear Workplace

P. Geraldini [1],
[1] Sogin S. p. A., Rome, Italy

Understanding the air flow patterns and aerosol trajectories in ventilated rooms can provide key information for determining where to place early warning and monitoring instruments, and how to minimize hazardous materials in the worker’s breathing zone. The dispersion within rooms can be influenced by complex interactions between numerous variables, but especially ventilation design and room ...

Application of Kelvin's Inversion Theorem to the Solution of Laplace's Equation Over a Domain That Includes the Unbounded Exterior of a Sphere

J. Russell[1]
[1]Florida Institute of Technology, Melbourne, FL, USA

In simulating physical systems modeled as solutions of partial differential equations over an unbounded domain, a challenge arises owing to the impossibility to cover an unbounded domain with a mesh. A classical problem in fluid dynamics, a solid sphere of radius a_s is submerged in a tank of water (at rest) of much larger size. The water is disturbed by the sphere’s sudden acceleration in the z ...

On The Modelling Of Electrowetting Using COMSOL Multiphysics

J.F. Dannenberg, J. Brinkert, and E.A.D. Lamers
Reden b.v., Hengelo (ov.), The Netherlands

One of the upcoming technologies in displays is that of the electrowetting displays. A surface can be covered by a colored oil or transparent water using a voltage to increase or decrease the wettability of the surface. A simulation of the behavior of such a thin film of oil in water, forced to move due an electrostatic field, has been made using the level-set, two-phase flow application mode ...

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 ...

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 ...

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 ...

Reducing Solar Heat Gain from Inclined Buildings’ Roof by Using Radiant Barrier System

S. Ebrahim[1], A. Alshayji[1]
[1]Department of Mechanical Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait City, Kuwait

The study produced a simulated model of natural convection in an inclined rectangular channel open ended with different locations of radiant barrier (RB) along the channel thickness(S). The upper plate is heated by various uniform constant heat fluxes while the inner surface of the lower plate has a very thin layer with low emissive aluminum foil. This model was used to adjust the location of ...