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.

Models for Simulation Based Selection of 3D Multilayered Graphene Biosensors

E. Lacatus [1], G. C. Alecu [1], A. Tudor [1],
[1] Politehnica University of Bucharest, București, Romania

At the forefront of a new generation of sensors graphene and graphene composite materials are intensively studied for medical and biosensing applications. The outstanding electrical, mechanical and quantum properties of graphene make them a promising material solution to overlap the existing gap between biological and non-biological systems into a continuum like-viscoelastic integrated model. ...

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 ...

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 ...

Alternate Glucometer Bio-sensor Model based on Ultrasonic MEMS Transceivers

P. Pattnaik[1], S. K. Kamilla [1], Debi Prasad Das[2]
[1]MEMS Design Center, Institute of Technical Education & Research (ITER),Siksha ‘O’ Anushandhan University, Bhubaneswar-751030, Odisha,India
[2]Process Engineering and Instrumentation Cell,Institute of Minerals and Materials Technology (IMMT),Bhubaneswar, Odisha,India

To prevent further complications in diabetes, proper management of blood glucose levels is essential. By using ultrasonic transceivers (both transmit and receive) the glucose level of human blood can be determined. By using this ultrasonic technique miniaturized sensors for non-invasive monitoring blood glucose levels. In this paper Barium Titanate (BT) thin film was used as a transmitter and ...

Modeling of an Oxygenation-Aided 3D Culture for Functional Beta-Cell Expansion

S. Jin[1], J. McReynolds[1], X. Li[2], J. Guan[2]
[1]Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, AR, USA
[2]Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA

Currently, researchers are looking for ways to mass-produce biologically functional pancreatic beta cells in vitro because of the shortage of donor tissue needed for diabetes cell therapy. The beta cells will become hypoxic if their high oxygen demands are not met. We hypothesized that the biological function of beta cells can be improved if they are cultured in a 3D collagen scaffold, which ...

Particle Tracing: Analysis of Airborne Infection Risks in Operating Theatres

P. Apell[1], S. Hjalmarsson[1], T. Lindberg[1], I. Wernström[1], Y. Tarakonov[1], A. Erichsen Andersson[2], M. Karlsteen[1]
[1]Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden
[2]Sahlgrenska University Hospital, Department of Anesthesia, Surgery and Intensive Care, Göteborg, Sweden

Patients undergoing surgery are sensitive to infections. The operation staff may spread 10^4 particles per person per minute, of which ten percent are presumed bacteria-carrying. We visualize the influence of the personnel on the air and particle flows for the two most common ventilation systems in Swedish hospitals using Comsol Multiphysics with particle tracing.. The Laminar Air flow ...

Modeling 3D Calcium Waves from Stochastic Calcium Sparks in a Sarcomere Using COMSOL Multiphysics®

L. T. Izu[1], Z. Coulibaly[2], B. Peercy[2]
[1]University of California-Davis, Davis, CA, USA
[2]University of Maryland, Catonsville, MD, USA

This paper utilizes the COMSOL Multiphysics® general form PDE interface and MATLAB® to model stochastic calcium waves in a sarcomere (basic unit of a heart cell). The model we present here shows the evolution of waves generated from calcium being released stochastically from sites modeled as point sources. The release sites are distributed on z-disc (planes) in a hexagonal pattern, and their ...

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 ...

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 ...

Simulating Organogenesis in COMSOL Multiphysics®: Parameter Optimization for PDE-based Models

D. Iber[1], D. Menshykau[2], P. Germann[2], L. Lermuzeaux[2,3]
[1]D-BSSE, ETH Zurich, Switzerland, SIB, Basel, Switzerland
[2]D-BSSE, ETH Zurich, Basel, Switzerland
[3]Department of Bioengineering, University of Nice-Sophia Antipolis, Nice, France

Morphogenesis is a tightly regulated process that has been studied for decades. Previously we developed data-based mechanistic models for a range of developmental processes with a view to integrate the available knowledge and to better understand the underlying regulatory logic. In our previous papers on simulating organogenesis in COMSOL Multiphysics® we discussed methods to efficiently solve ...

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