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.

Heat and Mass Transfer in Convective Drying Processes

C. Gavrila[1], A. Ghiaus[1], and I. Gruia[2]
[1]Technical University of Civil Engineering Bucharest, Faculty of Building Services, Bucharest, Romania
[2]University of Bucharest, Faculty of Physics, Bucharest, Romania

A dynamic mathematical model, based on physical and transport properties and mass and energy balances, was developed for the simulation of unsteady convective drying of agricultural products (fruits and vegetables) in static bed conditions. The model utilizes water sorption isotherm equations and the change in solid density due to the shrinkage phenomenon. The aim of this article is to describe ...

COMSOL Multiphysics-Based Exploratory Insulin Secretion Model for Isolated Pancreatic Islets

P. Buchwald
University of Miami, Miami, FL, USA

Insulin released by the beta-cells of pancreatic islets is the main regulator of glucose homeostasis, hence, insulin secretion models are of considerable interest for many possible applications. Building on our previous oxygen consumption and cell viability model for avascular islets of Langerhans, we developed an exploratory insulin secretion model that couples the hormone production rate to ...

Mathematical Model of Blood Flow in Carotid Bifurcation

E. Muraca[1], V. Gramigna[1], and G. Fragomeni[1]
[1]Department of Experimental Medicine and Clinic, Magna Graecia University of Catanzaro, Catanzaro, Italy

The goal of this research is to provide the medical staff with a numerical system assessment of wall shear stress in carotid bifurcation. Through this model, it will be fundamental to investigate the stress state properties of the surface in contact between the plaque and the artery, and study the geometric relationship between the bifurcation angle and fluid structural properties. The formation ...

From CT Scan to Plantar Pressure Map Distribution of a 3D Anatomic Human Foot

S. Gerbino, and P. Franciosa
University of Molise, School of Engineering, Via Duca degli Abruzzi, Termoli, Italy

Understanding the stress-strain behavior of human foot tissues and pressure map distributions at the plantar interface is of interest into biomechanical investigations. In particular, monitoring plantar pressure maps is crucial to establishing the perceived human comfort of shoe insoles. A 3D anatomical detailed FE human foot model was created, starting from CT (Computer Tomography) scans of a ...

3D-Simulation of Action Potential Propagation in a Squid Giant Axon

R. Appali[1], S. Petersen[1], J. Gimsa[2], and U. Rienen[1]
[1] Institute of General Electrical Engineering, Chair of Electromagnetic Field Theory, University of Rostock, Germany
[2] Institute of Biology, Chair of Biophysics, University of Rostock, Germany

Study of neurons plays a key role in the fields of basic and medical research aiming at the development of electrically active implants. The Fitzhugh-Nagumo equations are used to model and simulate the spike generation and propagation in a squid giant axon using COMSOL Multiphysics® 3.5a Software. It is shown that the Fitzhugh-Nagumo equations allow for a geometrical explanation of ...

A Finite Element Model for The Axon of Nervous Cells

S. Elia[1], P. Lamberti[1], and V. Tucci[1]
[1]Dept. of Electrical and Information Engineering, University of Salerno, Salerno, Italy

This paper proposes a FEM model for a segment of a nervous cell axon, which takes into account, through the so called Hodgkin-Huxley equations, the non linear and time varying dynamics of the membrane surrounding it. A combination with Maxwell equations is performed in a numerical procedure implemented in the COMSOL Multiphysics® environment. A thin layer approximated alternative model is ...

Design and Simulation of a Microscale Magnetophoretic Device for the Separation of Nucleated Fetal Red Blood Cells from Maternal Blood

G. Schiavone[1], D.M. Kavanagh[2], and M.P.Y Desmulliez[2]

[1]Politecnico di Torino, Torino, Italy
[2]MIcroSystems Engineering Centre, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh, Scotland, United Kingdom

Intense research has been carried out into methods that aim at harvesting fetal cells from maternal blood as substitutes to amniocentesis and chorionic villus sampling. This work focuses on the separation of fetal nucleated red blood cells from the maternal circulation based on their intrinsic magnetic properties. The design and simulation of a magnetophoretic separator is described, as it will ...

Rapid Prototyping of Biosensing Surface Plasmon Resonance Devices using COMSOL & Matlab software

J.J. Dubowski[1], and D.Carrier[1]
[1]Department of Electrical and Computer Engineering, Université de Sherbrooke, Quebec, Canada

We present a Finite Element Method simulation procedure that allows rapid development of prototype devices comprising novel self-referenced interference SPR (surface plasmon resonance) biosensing microstructures. The procedure takes advantage of  COMSOL Multiphysics and MATLAB software and their bi-directional link. The simulation is made using COMSOL RF Module, 2D harmonic propagation ...

Simulation of the Spread of Epidemic Disease Using Persistent Surveillance Data

Y. Liang[1], Z. Shi[1], S. Sritharan[1], and H. Wan[2]
[1]Central State University, Wilberforce, OH, USA
[2]Wright State University, Dayton, OH, USA

This paper proposes a novel data-mining framework to simulate the spread of epidemic diseases using persistent surveillance data. The framework is formulated by merging the persistent surveillance data about epidemics, geographic information and the dynamics of disease into a heat transfer model according to the theory of statistical mechanics . In the implementation of this framework, ...

Impedance Spectroscopy and Cell Constant of the Electrodes for Deep Brain Stimulation

E. Vinter[1], S. Petersen[1], J. Gimsa[2], and U. van Rienen[1]

[1]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
[2]Institute of Biology, University of Rostock, Rostock, Germany

To achieve a deeper understanding of the mechanism of the Deep Brain Stimulation (DBS) scientists use more and more numerical simulations. DBS inhibits overreaching brain activity via electric pulses that send into the brain by electrodes. Different electrode parameters such as geometry, frequency of stimulated impulse or applied voltage have a great influence on the size of the stimulated ...

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