Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Exploring the Design Space of Electro Thermal Actuators

W. Hodges, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we explore the design space of several configurations of electro thermal actuators (ETA) through COMSOL. A unique attribute of ETA is their ability to produce a large and stable actuation force using any semi-conductive material. Comparisons between ETAs are lacking. Without adequate comparisons, it is difficult for designers to readily decide which type and geometry of ETAs might ...

MEMS Scanning Probe with Three Degrees of Freedom

C. Hamm[1], and J.V. Clark[2]
[1]University of Portland, Portland, OR, USA,
[2]Purdue University, West Lafayette, IN, USA

In this paper, we present a computational study of a novel micro-electro-mechanical system (MEMS) scanning probe with three degrees of freedom (DOF). Such a probe is expected to be beneficial for nano and biotechnology research. For the past two decades, the atomic force microscope (AFM) has been successfully used in probing nanoscale phenomena. However, the accuracy of the AFM is unknown, it has ...

Patient-specific Modelling of Blood-flow in Cerebral Aneurysms

D. Zajarias-Fainsod[1], M.J. Chappell[1], J.F. Collingwood[1], A. Rennie[2], S. Nagaraja[2], and A. Wilson[2]
[1]University of Warwick, Coventry, UK,
[2]University Hospital Coventry and Warwickshire NHS Trust, Coventry, UK

A first stage in this research was to determine the feasibility of patient-specific modelling and the use of in-silico techniques to study flow for the first time in the same vessels with and without an aneurysm. Three-dimensional renderings of the cerebral blood vessels were reconstructed from computed tomography angiograms of the head using MATLAB (The MathWorks) for image processing and ...

Dielectric Stress and Coordination Study in the PAB72 High Voltage Circuit Breaker Interrupter

D. Andrade, and D. Schiffabuer
Pennsylvania Breaker LLC, Canonsburg, PA, USA

Pennsylvania Breaker presents a dielectric stress study for its 72kV class breaker. This study was instrumental in the design and testing procedures during the research and development phase. COMSOL was incorporated into the design pipeline as an important tool for rapid reference of complicated and costly steady state electric cases. The purpose of this study was to develop a robust geometric ...

Ionic Current Through Carbon Nanotubes

J.H. Park, and P. Krstic
Oak Ridge National Laboratory, Oak Ridge, TN, USA

Ionic current through an electrolyte filling a carbon nanotube (CNT) is characterized by unusually high current values, due to the strong slip of the fluid at the inner surface of the nanotube, as well as of a dominating role of electro-osmotic component. Using COMSOL, we explore the fundamental features of this phenomenon with respect to the CNT length and excess charge inside the tube. COMSOL ...

Modeling a Focused Microwave System for Transcutaneous Thermal Therapy of Breast Cancer

J. Stang, B. Fowlkes, M. Moghaddam, O. Kripfgans, and P. Carson
University of Michigan, Ann Arbor, MI, USA

A transcutaneous thermal therapy system is being developed for the targeted treatment of breast cancer cells using focused microwaves as an adjuvant to surgery, radiation, chemotherapy, and high intensity focused ultrasound (HIFU). Prior imaging studies are used to ascertain the material properties of the breast tissue, and this data is incorporated into a COMSOL Multiphysics model. Time ...

Energy Harvesting for Microid Microrobots: a Computational Study

J.V. Clark, F. Li, and A. Shankar
Purdue University, West Lafayette, IN, USA

In this paper we present a computational study on energy harvesting for microid microrobots. We examine the feasibility of extracting energy from the ambient environment through the piezoelectric legs of the microid. Microids are microrobots that have insect like dexterity. The microid’s use in remote locations makes it imperative for it to be able to recharge itself. Clark et al. presented a ...

Reliability Screening Test for Metal Foil Resistors

A. Cyganowski[1], H. Leidecker[2], J. Brusse[2], L. Panashchenko[2], and T.E. Schmidt[3]
[1]Rensselaer Polytechnic Institute, Troy, NY, USA
[2]NASA Goddard Space Flight Center, Greenbelt, MD, USA
[3]St. Mary's College of Maryland, St. Mary's City, MD, USA

Metal foil resistors are often chosen for NASA space flight applications due to their high precision and stability. COMSOL Multiphysics is used to develop a test that screens out metal foil resistors containing gridline defects. The resistors will be subjected to repeated short duration electrical pulses that induce localized heating and fatigue only in areas with constrained gridlines. The pulse ...

SAW Sensor

S. Liu, P. Wang, and H. Sun
University of Massachusetts Lowell, Lowell, MA, USA

In this paper we study the porous media coating (PMC) effect on the surface acoustic wave (SAW) sensor for chemical detection. Intensive research for SAW sensor is focused on using high surface polymer coating such as nanofibrous film to improve the sensitivity and to shorten response time for in situ trace level detections. A theoretical analysis shows the PMC can provide a higher and faster ...

Analysis Of The Design Criteria For Ancient Greek And Roman Catapults

K.M. Paasch
Center for Product Development, Mads Clausen Institute, South Danish University, Denmark

This paper will give a short overview of use of COMSOL Multiphysics for analyzing ancient Greek and Roman catapults with the main focus on the energy storing torsion springs. Catapults have been known and used in the Greek and Roman world from around 399 BC and a fully standardized design for powerful torsion catapults emerged around 270 BC, based on one basic factor, the diameter of the torsion ...

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