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.

Passive and Active Deformation Processes of 3D Fibre-Reinforced Caricatures of Cardiovascular Tissues

A. Di Carlo[1], P. Nardinocchi[2], T. Svaton[3], and L. Teresi[1]

[1]Modelling and Simulation Lab, Università Roma Tre, Roma, Italy
[2]Dept. of Structural & Geotechnical Engineering, Università di Roma La Sapienza, Roma, Italy
[3]Dept. of Mathematics, University of West Bohemia, Pilsen, Czech Republic

In this paper, we present a mathematical model of contractile elastic solids meant to simulate various districts of the cardiovascular system, and based on the concepts of active deformation and embedded muscle fibres. Specifically, here we deal with the modeling of the gross mechanics of the Left Ventricle (LV) which is strictly related to its pump function. As is well known, the effectiveness ...

Stress Field Simulation for Quantitative Ultrasound Elasticity Imaging

L. Yuan[1] and P.C. Pedersen[1]
[1]Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts, USA

Finite element models using COMSOL Multiphysics and MATLAB were developed to solve the problem of stress distribution interior homogeneous, isotropic, incompressible elastic solid material under known vertical external compression with a rectangular contact surface. Moreover, comparison between these results and analytical solutions was used to further validate that stress drops off with ...

Application of Solution Mapping to Reduce Computational Time in Actively Cooled Power Electronics

K. Lowe [1,2], and Rao V. Arimilli[2]
[1]Oak Ridge National Laboratory, Oak Ridge, TN, USA
[2]Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, TN, USA

In some power electronic applications the available coolant temperature is close to maximum and controlling operating temperature becomes more challenging, for which new thermal management schemes must be considered. COMSOL predicts the 3D fluid behavior and 3D temperature distribution within an actively cooled power electronic structure. A solution mapping method is implemented to more ...

Design of an Electrodynamically Actuated Microvalve Using COMSOL Multiphysics® and MATLAB®

M. Williams, J. Zito, J. Agashe, A. Sopeju, and D. Arnold
University of Florida, Gainesville, USA

This paper describes the design of a normally closed, electrodynamic microvalve.  Magnetic forces between a permanent magnet in the valve cover and a soft magnet in the valve seat hold the valve closed.  The combination of electrodynamic actuation and a mechanical restoring spring are used to open the valve.  A device model and a design optimization strategy using COMSOL ...

3D Dynamic Simulation of a Metal Hydride-Based Hydrogen  Storage Tank

A. Freni, and F. Cipiti
CNR- Institute for Advanced Energy Technologies “Nicola Giordano”, Messina, Italy

In this paper, a 3D dynamic simulation for a portion of a metal hydride-based (LaNi5) hydrogen storage tank is presented. The model is based on heat and mass balances and considers coupled heat and mass transfer resistance through a non-uniform pressure and temperature sorbent bed. The governing equations were implemented and solved using the COMSOL Multiphysics software package. The simulation ...

Finite-Element Evaluation of Thermal Response Tests Performed on U-Tube Borehole Heat Exchangers

E. Zanchini, and T. Terlizzese
[1]Dipartimento di Ingegneria Energetica, Nucleare e del Controllo Ambientale, Università di Bologna, Bologna, Italy

The results of two thermal response tests recently performed on two vertical borehole heat exchangers (BHEs) are presented. The BHEs have the same cross section and a depth of 100 m and 120 m respectively. The evaluation of the thermal properties of the ground and grout are performed by a finite-element simulation method, developed through the software package COMSOL Multiphysics 3.4.

Three-Dimensional Simulation of Signal Generation in Wide-Bandgap Semiconductor Radiation Detectors

J. E. Toney[1]
[1]Pennsylvania State University Electro-Optics Center, Freeport, Pennsylvania, USA

We demonstrate the use of Comsol Multiphysics with Matlab to model signal generation in wide-bandgap semiconductor radiation detectors. A quasi-hemispherical detector design is compared with a simple, planar detector. Results show that the quasi-hemispherical design can simply and effectively compensate for the poor hole transport of most compound semiconductor materials.

Detection of E.coli Cell using Capacitance Modulation

A.K. Dwivedi, R.M. Patrikar, R.B. Deshmukh, and G. Pendharkar
Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, India

Testing and verification is very important to increase reliability of a system. In water analysis its purity is verified using different test methods. Biosensors are very useful to detect the microorganisms present in water. This paper presents a method to detect E.coli bacteria in water depending upon the capacitance modulation in the presence and absence of E.coli cell, which is simulated in ...

FEM Based Modeling In COMSOL Multiphysics and Design Of Control Of Distributed Parameter Systems

C. Belavý, and G. Hulkó, and K. Ondrejkovic, and D. Šišmišová
Slovak University of Technology in Bratislava, Bratislava, Slovakia

This paper presents a finite element method based modeling and design of control for distributed parameter systems. First, models of distributed parameter systems in the form of lumped-input/distributed-output systems and structure of control loop are introduced. Next, modeling of temperature fields of the casting die as distributed parameter systems in preheating process is performed in COMSOL ...

Complex Geometry Creation and Turbulent Conjugate Heat Transfer Modeling

I. Bodey[1], R. Arimilli[1], and J. Freels[2]
[1]Dept. of Mechanical, Aerospace and Biomedical Eng., The University of Tennessee, Knoxville, TN
[2]Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN

The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) is an 85 MW, light-water moderated, research reactor that operates at low temperature and high pressure. The HFIR is presently scheduled to convert from a high enriched uranium fuel (HEU) to a low enriched uranium fuel (LEU) in 2019. Due to cost constraints, not all experiments will be repeated for the LEU fuel ...

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