Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Harvesting Wind Energy for Microid Microrobots

J. Clark, F. Li, S. Naidu, R. Sahu, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we numerically investigate the feasibility of microids to harvest energy from the wind using the piezoelectric effect to recharge its energy supply. Microids are a particular subset of microrobots that have insect-like dexterity. In order for microids to function autonomously long-term outdoors, it is advantageous for them to be able to extract renewable energy from the environment. ...

Verifying the Measurement of Force, Displacement, and Stiffness of MEMS Using Electro Micro Metrology Through Nonideal Simulated Experiments

G. Campos[1], and J.V. Clark[2]
[1]Purdue University, Calumet, IN, USA,
[2]Purdue University, West Lafayette, IN, USA

In this paper we verify the measurement of force, displacement, and stiffness of micro electro mechanical systems (MEMS) using electro micro metrology (EMM) through nonideal simulated experiments in COMSOL. EMM is a metrological technique used to extract micro scale mechanical properties solely in terms of electrical measurands such as capacitance, voltage, or frequency. EMM uniquely facilitates ...

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 ...

Gating of Gigantic Ionic Current through Single-Walled Carbon Nanotubes

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

The gigantic magnitude features of the ionic current of electrolyte through carbon nanotubes (CNT) are explained by the dramatic increase of electroosmotic current induced by the strong slip at the CNT surface and the considerable excess volume charge inside the tube. In this study, we investigate the fundamental details of gating phenomena of such gigantic ionic current through CNT by using ...

Optimization of the Design Parameters of a Piezoelectric Actuator

G. Srivastava[1], R. Sharma[1], A. Goswami[2], A. Phani[2], and R. K. Dwivedi[1]
[1]Jaypee Institute of Information Technology, India
[2]Indian Institute of Science, India

In this work a cantilever beam has been chosen as the element of study, consisting of a piezoelectric polymer like PVDF with a thin permalloy layer coating on one side of it. This piezoelectric cantilever is designed using COMSOL software. It is seen that the deflection of the tip of a unimorph cantilever is dependent on its geometric dimension, type of material and the applied field. Hence in ...

Design of a RF MEMS Switch

B. Mishra, M. P. S. Naidu, J. Raj, and Z. C. Alex
VIT University
Tamilnadu, India

This paper presents a novel design of a RF MEMS Switch. The switch is a capacitive type, which is actuated by an electrostatic force. The structure of the switch consists of a CPW (coplanar waveguides) transmission lines and a suspended membrane. The modelling of switch is done using COMSOL software and RF characteristics is found out by using CST software.

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