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 Study on Acoustic Field Generated by Dipole Sources in Noncircular Pipe

H. Zhang, W. Lin, and X. Wang
Chinese Academy of Sciences, Institute of Acoustics, Beijing, China

Acoustical well logging is an important technology for petroleum industry. Calibration and testing of tools in real wells is not feasible because the cost is high and the condition is not controllable. During manufacturing and maintaining, the logging tools are usually tested in a fluid filled circular pipe. The acoustic field in non-circular wells are calculated by using of the PDE mode of ...

Loading Conditions in the Feed Sparger of a Steam Drum Influenced by Thermal Shock

P. Goyal, A. Dutta, R.K. Singh, and K.K. Vaze
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Steam drum in a nuclear power plant is one of the important components of Primary Heat Transport (PHT) system where steam is separated from the steam water mixture. Steam water mixture emanating from the reactor core is separated in a steam drum. Separated steam goes to the turbine whereas separated water after mixing with incoming feed water returns to the reactor. The entire feed water flow is ...

Modeling Bacterial Clearance Using Stochastic-Differential Equations

A. Jeremic, and A. Atalla
McMaster University, Hamilton, ON, Canada

In this paper, we develop a mathematical model to simulate the movement of bacteria into and within a capillary segment. Also, we model the transportation through capillary walls by means of anisotropic diffusivity that depends on the pressure difference across the capillary walls. By solving the model using COMSOL, it was possible to predict the concentration of bacteria at points within the ...

The 3D Mixed-Dimensional Quench Model of a High Aspect Ratio High Temperature Superconducting Coated Conductor Tape

W.K. Chan[1,2], J. Schwartz[2], P. Masson[3], and C. Luongo[4]
[1]FAMU-FSU College of Engineering, Tallahassee, FL, USA
[2]North Carolina State University, Raleigh, NC, USA
[3]Advanced Magnet Lab, Palm Bay, FL, USA
[4]ITER Organization/Magnet Division, Saint Paul-lez-Durance, France

A successful development of an effective quench detection and protection method for a high temperature superconducting (HTS) coil based on a HTS coated conductor tape lays on a thorough understanding of its slowly propagating, three-dimension (3D) quench behavior. Toward this goal, a 3D micrometer scale finite element (FE) thermo-magnetostatic HTS tape model is developed and implemented in ...

Thermal and Laminar-Fluidic Workbench for a metric Portion of a Gun

M. Brun
Nexter Systems, Versailles, France

Part of a 120mm gun has been represented as a perforated conic iron solid, surrounded by an annular screen. Inside the gun are limit conditions of isolation or thermal flux. The screen is described as a shell, receiving solar heat and exchanging with the outside atmosphere. It bears a defined number of holes on its top and bottom lines, maintaining semi-captive air between itself and the gun. ...

A General Method for Solving Equations - The Dynamical Functional Particle Method

M. Gulliksson, and S. Edvardsson
Mid Sweden University, Sundsvall, Sweden

Given any equation L(u)=0, e.g. a partial differential equation, it can be considered to be the stationary solution of a time dependent equation (in fact, time need only to be fictitious time not real time). Our approach is to choose the time dependence in analogy with an oscillating particle system including damping in order to damp out the time derivatives and attain a stationary solution ...

The Effect of Cartilaginous Rings on Deposition by Convection, Brownian Diffusion and Electrostatics

H. Akerstedt
LuleƄ University of Technology, LuleƄ, Sweden

This paper presents a numerical study of the deposition of spherical charged nanoparticles caused by convection and Brownian diffusion in a pipe with a cartilaginous ring structure. The model is supposed to describe deposition of charged particles in the upper generations of the tracheobronchial tree of the human lung. The upper airways are characterized by a certain wall structure called ...

Comparative Study of an Open Waveguide.Application to Deconvolution of a Magnetic Probe in Near-Field Zone

A. Saghir, J.W. Tao, and C. Avram
INP, Laplace site Enseeiht, Toulouse, France

We present here our work on deconvolution of a magnetic probe to mesure electromagnetic emissions in near-field zone. To achieve this work,we have chosen a rectangular waveguide (WR90) as a radiating structure.Theoritical near-field is simulated using a FEM software (COMSOL) and also obtained by using a program based on transverse operator method (TOM), that lead to a very good field ...

Microsoft Technical Computing

H. Steepler
Microsoft, Sweden

Henrik Steepler earned his PhD in Computer Science in 1999 at Chalmers University, Sweden. Since 2003, he has been working at Microsoft on emerging markets like Security, Virtualization, and since 2007 on their High Performance Computing (HPC) initiative. He is now managing the partner network for Microsoft in Europe, the Middle East, and Africa around HPC.

Validation of a Simplified Model to Determine the Long-Term Performance of Borehole Heat Exchanger Fields With Groundwater Advection

S. Lazzari[1], A. Priarone[2], and E. Zanchini[1]
[1]University of Bologna, Department DIENCA, Bologna, Italy
[2]University of Genova, Department DIPTEM, Genova, Italy

Finite element simulations performed through COMSOL Multiphysics are used to study the long-term performance of BHE fields placed in a water-saturated porous soil subjected to groundwater movement. The heat transfer problem is written in a dimensionless form and the long-term time evolution of the mean surface temperature of the BHEs, sketched as cylindrical heat sources subjected to a regular ...

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