技術情報とプレゼンテーション

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.

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 ...

Simulations of Micropumps Based on Tilted Flexible Structures

M. J. Hancock[1], N. H. Elabbasi[1], M. C. Demirel[2]
[1]Veryst Engineering, LLC, Needham, MA, USA
[2]The Pennsylvania State University, University Park, PA, USA

Pumping liquids at small scales is challenging because of the principle of reversibility: in a viscous regime, the flow streamlines through a fixed geometry are the same regardless of flow direction. Recently we developed a class of microfluidic pump designs based on tilted flexible structures that combines the concepts of cilia (flexible elastic elements) and rectifiers (e.g., Tesla pump). We ...

Numerical Results of Two 3D Coupled Models of a Unitary PEM Fuel Cell of 144cm²

E. Robalinho[1], E. F. Cunha[2], M. Linardi[2]
[1]Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil
[2]IPEN/CNEN-SP, São Paulo, SP, Brazil

This computational implementation presents a new strategy of coupling two 3D models to satisfy the requirements of the comprehensive model of a unitary Proton Exchange Membrane fuel cell, including its internal geometries and constitutive materials, as well as distinct physical and chemical processes. Those different simultaneous processes required computational effort and the solution was the ...

Modeling of a Three Inputs Two-Dimensional Geometry Microreactor

E. Robalinho[1], E. Cekinski[2]
[1]IPEN/CNEN-SP, São Paulo, SP, Brazil; Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil
[2]Instituto Mauá de Tecnologia IMT, São Paulo, Brazil; IPT-SP, São Paulo, SP, Brazil

This paper presents the results of modeling of a microreactor with three inputs geometry (or crow's-feet), in relation to distributions of velocities and concentrations. The objective of this work is the study of this kind of geometry with relation to fluid dynamics behavior, improving the knowledge of microfluidics and microreactors projects. These numerical responses allow conclusions about the ...

Carbon Steel Pipeline Wall Thickness Measurement Using Pulsed Eddy Current Technique - new

S. Roy[1], S. K. Pradhan[1], T. V. Shyam[2], B. S. V. G. Sharma[2],
[1] Atomic Energy Regulatory Board, Mumbai, Maharashtra, India
[2] Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Carbon Steel pipes are used as feeder pipes in Pressurized Heavy Water Nuclear Reactors for carrying the coolant from the inlet headers to the coolant channel and again from outlet of the coolant channel to the outlet headers and are part of the Primary Heat Transport (PHT) System of Reactor. It has been observed that these feeders suffer from Flow Accelerated Corrosion (FAC) at the bends and ...

Modeling and Simulation of High Sensitivity CMOS Pressure Sensor Using Free Boundary Circular Diaphragm Embedded on Ring Channel Shaped MOSFET - new

S. Joy[1], T. Tom[1]
[1]Rajagiri School of Engineering and Technology, Kochi, Kerala, India

Sensors have diverse applications ranging from the medical field to space exploration. They convert physical parameters such as temperature, pressure, humidity etc. into an electrical output. The discovery of piezoresistivity property of silicon and germanium led to miniaturization of pressure sensors. Improvement in the sensitivity is the major factor to be considered while designing pressure ...

Modelling of Tissue Morphogenesis as the Resultant of Constitutive Cells Activities

L. Forest
Laboratoire Techniques de l'Imagerie, de la Modélisation et de la Cognition, Faculté de Médecine, Domaine de la Merci

The aim of this work is to study tissue morphogenesis as a consequence of the constitutive cells dynamics. Tissue morphogenesis is modelled as a cellular system coupled with a global chemical control. p> Two concrete examples are presented, the secondary growth of conifer trees and the epithelial invagination.

Multiphysics 2007

J. Dunec
COMSOL, Palo Alto

In this presentation we present where COMSOL Multiphysics and its modules will be in the year 2007. The presentation considers the upcoming features, not only from a developers point of view, but also through examples from different branches of applied physics and mathematics. In addition, we present some important milestones during the past 10 years for COMSOL ...

Optimized Design of Shielded Microstrip Lines using Adaptive Finite Element Method

P. Kakria[1], A. Marwaha[1], and M. S. Manna[2]
[1]Electronics & Communication department, SLIET Longowal, Distt. Sangrur, Punjab, India.
[2]Electrical & Instrumentation department, SLIET Longowal, Distt. Sangrur, Punjab, India.

In this paper, the attempt has been made to design and analyze single strip shielded Microstrip line with capacitive coupling. The main objective is to compute the capacitance per unit length of shielded Microstrip line using Finite Element technique. The computational and simulation work has been carried out with the help of FEM based COMSOL Multiphysics software. The shielded Microstrip ...

Can we use Aquifers to Monitor Magma Chambers? Using COMSOL Multiphysics® to Investigate Subsurface Strain Changes and Their Effect on Hydrological Systems

K. Strehlow[1], J. Gottsmann[1], A. Rust[1]
[1]University of Bristol, Bristol, UK

Groundwater-bearing geological layers respond to and modify the surface expressions of magmatic activity, and they can also become agents of volcanic unrest themselves. Interpretations of unrest signals as groundwater responses to changes in the magmatic system can be found for many volcanoes and include a wide range of phenomena and suggested processes to explain them (e.g., Newhall et al., ...

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