Articles techniques et présentations

Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

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 the ...

Modeling Deep-Bed Grain Drying Using COMSOL Multiphysics®

J.G. Pieters[1], R. ElGamal[1], F. Ronsse[1]
[1]Faculty of Bioscience Engineering, Department of Biosystems Engineering, Ghent, Belgium

CFD simulations were carried out to predict the convective heat and mass transfer coefficients in the rice bed, and correlations were developed for the convective heat and mass transfer coefficients as a function of drying air flow rate. The developed correlations were used to extend the model developed by ElGamal et al. (2013) for thin-layer rice drying to volumetric heat and mass transfer in a ...

Studies of Lead Free Piezo-Electric Materials Based Ultrasonic MEMS Model for Bio sensor

P. Pattanaik[1], S. K. Kamilla[1], D. P. Das[2], S. K. Pradhan[3]
[1]MEMS Design Center, Institute of Technical Education & Research (ITER), Sikhya ‘O’ Anushandhan University, Bhubaneswar, Odisha, India
[2]Process Engineering and Instrumentation Lab, Institute of Minerals and Materials Technology (IMMT), Bhubaneswar, Odisha, India
[3]Dept of ECE, Hi-Tech Institute of Technology, Khurda, Odisha, India

This paper describes the design of an ultrasonic transducer using different lead free piezo-electric materials and evaluates their performance with different glucose levels in the human blood. COMSOL Multiphysics 4.2a was used for the simulation study using 2D axis symmetric model of piezoelectric transducer which was designed with lead free piezoelectric materials such as Barium Sodium Niobate ...

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 ...

Acoustic Field Comparison of High Intensity Focused Ultrasound Using Experimental Characterization and Finite Element Simulation

J. L. Teja[1], A. Vera[1], L. Leija[1]
[1]Department of Electrical Engineering, Cinvestav-IPN, Mexico D.F., Mexico

High Intensity Focused Ultrasound (HIFU) is used as a noninvasive technique of tissue heating and ablation for different medical treatments. This paper presents a quantitative comparison of HIFU acoustic fields experimentally obtained versus simulated acoustic fields. Acoustic field characterization was realized in two HIFU transducers using water as a propagation medium. Also, simulations were ...

Analysis of 3D Biocompatible Additive Structure Using COMSOL Multiphysics® Software - new

E. Lacatus[1], M. A. Sopronyi[2], G. C. Alecu[1], A. Tudor[1]
[1]Polytechnic University of Bucharest, Bucharest, Romania
[2]INFLPR -National Institute for Laser Plasma and Radiation Physics, Bucharest, Romania

For biocompatible prosthetics, from dental implants up to bone parts, manufacturers have to find the best way to correlate process parameters and the material properties as to meet the unique needs of individuals. Additive manufacturing techniques aim at creating complex biocompatible structures able to overcome the present shortfalls of the metal and metal alloys implants related to ...

Simulation of Transdermal Toxin Expulsion via Adsorptive Dermal Patch using COMSOL Multiphysics®

H. Kwon[1], M. Hess II[1], R. M. Polski
[1]Andrews University, Berrien Springs, MI, USA

Mathematical skin models play an important role in fields such as transdermal drug delivery and assessment of dermal exposure to industrial chemicals. Extensive research has been conducted on modeling skin for transdermal drug delivery; however, little effort has been made to view the skin as a permeable layer to expel waste chemicals or toxins from the body. In this work, we focused on topical ...

Modeling Drug Release from Materials Based on Electrospun Nanofibers

P. Nakielski[1], T. Kowalczyk[1], T.A. Kowalewski[1]
[1]Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw, Poland

Comprehensive studies of drug transport in nanofibres based mats have been performed to predict drug release kinetics. The paper presents our approach to analyze the impact of fibers arrangement, one of the parameters varied in our parallel experimental studies. COMSOL Multiphysics® has been used to assess the impact of the various purposed arrangements of fibers within the mat. Drug release ...

Computational Modeling and Simulation of the Human Duodenum

B. Hari[1], S. Bakalis[1], P. Fryer[1]
[1]The University of Birmingham, School of Chemical Engineering, Edgbaston, Birmingham, United Kingdom

Worldwide attention in the computational modeling and simulation of the human intestine is increasing in order to help understand its complex behavior and improve health. Computational fluid dynamics is an essential tool to understand the mechanics and transport phenomena of the human intestine, thereby advancing the diagnosis and treatment of gastrointestinal related diseases. The aim of this ...

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 ...

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