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.

Lamb Waves and Dispersion Curves in Plates and It’s Applications in NDE Experiences Using Comsol Multiphysics

P. Gómez, J. P. Fernandez, and P. D. García
Hydro-Geophysics & NDE Modeling Unit
University of Oviedo
Mieres, Spain

In this paper, a model for numerically obtaining lamb wave modes and dispersion curves in plates is presented. It is shown that COMSOL Multiphysics can be employed to simulate the behavior of guided waves in dispersive plates, which is useful for NDE applications. A two dimensional steel plate (4x0.1 meters) is excited with a space-time impact point source. To model the point source, we use ...

Coupled PDEs with Initial Solution from Data in COMSOL Multiphysics®

M. K. Gobbert[1], X. Huang[1], S. Khuvis[1], S. Askarian[1], B. E. Peercy[1]
[1]University of Maryland - Baltimore County, Baltimore, MD, USA

This paper presents information on techniques needed in COMSOL Multiphysics® to enable computational studies of coupled systems of PDEs for time-dependent non-linear problems. Furthermore, we demonstrate how to use data files as input for initial conditions. To illustrate the techniques, we consider a system of two time-dependent non-linear PDEs from mathematical biology that couples an ...

Simulation of PTFE Billet Sintering using COMSOL

A. Roday, and P. Nicosia
Garlock Sealing Technologies
Palmyra, NY

Sintering is an important step in the manufacturing of polytetrafluoroethylene (PTFE) billets. The challenge in heating large billets stems from the inherent low thermal conductivity of PTFE. Existing literature suggests determining maximum heating rate experimentally using recommended guidelines. This paper uses COMSOL to aid in optimizing the temperature profile required for a particular ...

A Practical Method to Model Complex Three-Dimensional Geometries with Non-Uniform Material Properties Using Image-based Design and COMSOL Multiphysics®

J. Cepeda[1], S. Birla[2], J. Subbiah[2], H. Thippareddi[1]
[1]Department of Food Science & Technology, University of Nebraska, Lincoln, NE, USA
[2]Department of Biological Systems Engineering, University of Nebraska, Lincoln, NE, USA

Geometries with heterogeneous material properties are typically defined as a set of multiple parts, each part representing a different material. However, assembling or defining the individual parts of complex geometries can be difficult. A practical method based on image-based mesh generation, a custom algorithm for labeling materials, and interpolation functions of COMSOL Multiphysics® can be ...

Design and Simulation of Unimorph Piezoelectric Energy Harvesting System

E. Varadarajan[1], M. Bhanusri[2],
[1]Research and Innovation Centre (RIC), IITM Research Park, Chennai, Tamil Nadu, India
[2]Department of Physics, Indian Institute of Technology (IIT) Madras, Chennai, Tamil Nadu, India

In this paper we made an attempt to maximize the power output in the different piezoelectric materials in a unimorph cantilever beam configuration. In this research, a macro scale unimorph piezoelectric power generator prototypes consists of an active piezoelectric layer, stainless steel substrate and titanium proof mass was designed for frequencies 60 Hz - 200 Hz. An analytical model of a micro ...

Study of Stent Deformation and Stress Developed at Different Stent Deployment Pressures

K. Basu[1], P. Ghosh[2], A. Chanda[1]
[1]School of Bio Science and Engineering, Jadavpur University, Kolkata, West Bengal, India
[2]Jadavpur University, Kolkata, West Bengal, India

According to clinical reports, cardiovascular disease has become a major global healthcare problem. The deposition of fats, cholesterol etc. at the arterials walls causes thrombus formation leading to stenosis and arterial blockage. To tackle this, along with arterial bypass, the use of Cardiovascular Stent is considered promising and effective (in single vessel and bi vessel diseases). While ...

Simulation of Droplet Impingement on a Solid Surface by the Level Set Method - new

J. Hu[1], R. Jia[1], K. Wan[2], X. Xiong[3]
[1]Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
[2]Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA
[3]Department of Electrical Engineering, University of Bridgeport, Bridgeport, CT, USA

The dynamic behavior of droplet impingement on a solid surface is important to many engineering applications. This paper studied the dynamic behavior of a droplet impinging onto solid dry surfaces with different surface wettability using the COMSOL Multiphysics® software. The simulation results were validated against experimental results. It was found that the Level Set method can predict the ...

Modeling of a Counter Flow Plate Fin Heat Exchanger - new

R. Jia[1], J. Hu[1], X. Xiong[2]
[1]Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
[2]Department of Electrical and Computer Engineering, University of Bridgeport, Bridgeport, CT, USA

Plate fin heat exchangers are widely used for heat recovery or cooling purposes in many industries, such as cryogenics, aerospace and automobile industries. This paper developed a numerical model to simulate the heat transfer and fluid flow in a counter flow plate fin heat exchanger and optimize its design parameters. The conjugate heat transfer in the finned plate and fluids in the channels ...

Implementation of a Viscoelastic Material Model to Simulate Relaxation in Glass Transition - new

Z. Zheng[1], R. Zhang[1]
[1]Corning Incorporated, Corning, NY, USA

Introduction: Glass relaxation occurs in a range of temperature during transition from equilibrium to super-cooled liquid. Viscoelastic material model can be applied to simulate glass behavior during the glass transition regime and to predict the glass deformation and stress evolution. Viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when ...

Design of a MEMS Capacitive Comb-drive Accelerometer

T. Kaya[1], B. Shiari[2], K. Petsch[1], and D. Yates[2]
[1]Central Michigan University, School of Engineering and Technology, Mount Pleasant, MI
[2]University of Michigan, Dept. of Electrical Engineering and Computer Science, Ann Arbor, MI

In this work, a MEMS low-g accelerometer with three sensitive directions is designed for health monitoring applications. The accelerometer may have different sensitivity in different axes. The proof-mass of the device is suspended by four serpentine springs, and the comb drive structure is used to form the differential capacitor to measure the displacement of the proof-mass. The structure has an ...