Technical Papers and Presentations

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.

Photon Migration Through Multiple Layers of Biological Tissue

M.S. Yeoman[1], E. Sultan[2]
[1]Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
[2]College of Technological Studies, PAAET, Adailiyah, Kuwait

The modeling of light propagation through multiple layers of biological tissue are assessed & compared to the theoretical predictions by Perelman at al. [94 & 95] of the most-favorable-path (MFP). The MFP on which photons will be found can be obtained from the path of the net flux propagation using the diffusion equation. The diffusion equation is valid when studying diffuse light propagation, ...

Irrotational Motion of an Incompressible Fluid Past a Wing Section in an Unbounded Region

J. Russell[1]
[1]Florida Institute of Technology, Melbourne, FL, USA

Developers of numerical models who address the title problem face several hurdles, such as: (1), the need to formulate boundary conditions applicable in an unbounded region; (2), The need to specify conditions suitable to ensure a unique solution in a doubly connected region; and (3), The need to allow the interior boundary to have a sharp edge, such as a cusp. The aim of the work reported ...

Accelerating R&D with COMSOL: A Personal Account

Erik Birgersson[1]

[1]Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore

This presentation gives an account of how COMSOL Multiphysics® software has helped to accelerate research and development. It has been used to simulate energy systems such as fuel cells, biomedical systems such as hydrogels and human skin, and monolithic catalytic converters. Each of these systems requires a mathematical model that can accurately represent the relevant physics, and which can be ...

Toward Energy Zero Building: A COMSOL Multiphysics® Model of Building and its HVAC System

F. Bruno[1]
[1]ENERSPACE Srl, Genoa, Italy

A model built with COMSOL Multiphysics® to exploit meteorological forecasts and instant outdoor meteorological data (temperature, solar radiation, moisture, wind speed and direcition, etc.) together with indoor ambient data (air temperature, radiant temperature of enclosures, etc), building parameters (mass, orientation, surface, structural composition, etc.) and historical consumption of ...

Optimum Design of Dual-modality Sensing Electrode Array

W. Huaxiang, W. Jing, H. Li, and J. Weiwei
School of Electrical Engineering & Automation, Tianjin University, Tianjin, Taiwan

Sensing electrodes array model of 3-Dimensional ERT/ ECT dual modality is established by using the software COMSOL. According to the uniformity of sensitivity field distribution, the correlation coefficient and the reconstructed image space resolution, the ECT/ERT dual modality sensing electrode arrays are optimized. Experimental results show that the optimized sensing electrode array of the ...

Robust Design of an LEM by Means of Interval Taylor Extension

B. De Vivo, P. Lamberti, and V. Tucci
Dept. of Electrical and Electronic Engineering, University of Salerno, Salerno, Italy

In this paper, the Robust Design of a Linear Electric Motor (LEM) is performed. A Robust Design is a set of nominal parameters that satisfies the customer constraints with uncertain parameters. In particular, it is possible to obtain the Most Robust Stationary Design (MRSD) of a Performance Function (PF) by looking at the minimum range of the Interval Extension of its Taylor series. Furthermore, ...

Finite Element Analysis of Molecular Rydberg States

M.G. Levy[1], X. Liang[1], R.M. Stratt[1], and P.M. Weber[1]

[1]Department of Chemistry, Brown University, Providence, Rhode Island, USA

Identifying molecules requires associating molecular structures with their electronic energy levels. In this paper we introduce a novel technique for the calculation of molecular Rydberg levels. The technique allows for easy visualization of the associated wavefuntions to make unambiguous assignments. The value calculated for the 3p state of trimethylamine is most closely in agreement with recent ...

Using COMSOL for Smart Determination of Material Properties Using Inverse Modeling Techniques

J. van Schijndel, S. Uittenbosch, and T. Thomassen
Eindhoven University of Technology
Eindhoven, Netherlands

The paper presents the development of a method that determines building material and surface properties using relative simple and low-budget experiments, The method comprehends an optimal design of an experimental set up for smart determination of heat and moisture properties using both normal and inverse modeling techniques. It is concluded that the suggested methodology of the inverse ...

Web Based Laboratories for Teaching Electromagnetics for TEMPUS eLab Project

Y. El-Qattan [1], H. Ghali[1]
[1]Electrical Engineering Department, The British University in Egypt (BUE), El Sherouk City, Egypt

This paper presents a successful step towards the development of a “web-based laboratory” for teaching basic, and even advanced, electromagnetic concepts. The main idea is to develop a reusable model for the student to be used exactly as a hardware experiment in a physical laboratory, where he/she can change some of the experiment\'s physical parameters and get corresponding results. The two ...

Blood Flow Patterns in a Patient Specific Right Coronary Artery with Multiple Stenoses

B. Liu[1]
[1]Department of Mathematics, Monmouth University, West Long Branch, NJ, USA

Atherosclerotic lesions preferentially develop in certain regions like bifurcations, branches, and bends [1, 2]. A possible explanation for such a preferential localization of atherosclerosis is that the geometry of the vessel influences the blood flow pattern. It suggests that the arterial geometry plays an important role in determining the localized blood flow information. Thus hemodynamic ...

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