S. Ouenzerfi [1,2,3], H.A.C. Tilmans , S. El-Borgi[3,4], X. Rottenberg 
 KACST-Intel Consortium Center of Excellence in Nano-manufacturing Applications (CENA), Riyadh, KSA
 IMEC, Leuven, Belgium
 Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, University of Carthage, La Marsa, Tunesia
 Texas A&M University at Qatar, Mechanical Engineering Program, Engineering Building, Doha, Qatar
This paper presents the modeling and simulation of electro-thermo-mechanical self-oscillators, an emerging type of M/NEMS-enabled timing devices in which sustaining electronic amplifiers are not required for their operation. Indeed, they realize amplification in the mechanical domain and feedback by crossing three physical domains: electrical, thermal and mechanical. In a previous work , we ...
A. Ricci and E. Giuri
Materials and Microsystems Laboratory (CHI-Lab), Politecnico di Torino, Torino, Italy
Cantilever vibration in fluid environment is probably one of the most common Fluid Structure Interaction problems in the field of Micro/Nano Electro Mechanical Systems. Usually the effect of fluid on cantilever oscillation is characterized in terms of mode resonance frequencies and quality factors (Qs). In this work a new approach to the above FSI problem is proposed: modes Q factors and ...
S. Sihn[1,2], and A.K. Roy
Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio, USA
University of Dayton Research Institute, Dayton, Ohio, USA
COMSOL Multiphysics was used to solve a phonon Boltzmann transport equation (BTE) for nanoscale heat transport problems. One dimensional steady-state and transient BTE problems were successfully solved based on finite element and discrete ordinate methods for spatial and angular discretizations, respectively, by utilizing the built-in feature of the COMSOL, Coefficient Form of PDE.
Dynamic Characterization and Mechanical Simulation of Cantilevers for Electromechanical Vibration Energy Harvesting
N. Alcheick, H. Nesser, H. Debeda, C. Ayela, I. Dufour 
Univ. Bordeaux, IMS Lab, Pessac, France
Energy harvesting from ambient vibrations has become an interesting topic for powering wireless sensor networks. Resonant microdevices based on MEMS have become of central importance at low frequency. The power produced at resonance is at least one order of magnitude larger than off frequency power since the largest strain is obtained at resonance. In order to obtain large strain for efficient ...
S. Kundu , H. B. Nemade ,
 Indian Institute of Technology Guwahati, Guwahati, Assam, India
The paper presents simulations of uniform thickness and thickness-tapered types of piezoelectric vibration energy harvesters using COMSOL Multiphysics software. The simulated vibration energy harvesters have bimorph cantilever structure with end mass. Tapering the thickness of the piezoelectric layer in bimorph towards the free end is found to improve the stress distribution in the beam and ...
A. El Kacimi , E. Pauliac-Vaujour , J. Eymery 
 University Grenoble Alpes, CEA, LETI, MINATEC Campus, Grenoble, France
 University Grenoble Alpes, CEA, Grenoble, France
We report on the modeling of flexible piezoelectric capacitive sensor based on GaN wires grown by Metal Organic Vapor Phase Epitaxy. Single crystal cone-shaped wires with hexagonal cross section are embedded within dielectric layers (parylene) in between two metal electrodes to achieve a capacitive structure. The device characteristics directly depend on growth conditions for example by tuning ...
U. Vogel , M. Spindler , S. Wege , T. Gemming 
 Leibniz Institute for Solid State and Materials, Dresden, Germany
In this work, we seek to simulate SAWs for a better understanding and to benchmark the currently available cloud computing possibilities of COMSOL Multiphysics® software. By using the MEMS module we demonstrate 3D models with reduced geometry to achieve principle information about the wavefield. For a benchmark, a high-speed workstation with limited memory (RAM) is compared to the most potent ...
A. Arevalo , D. Conchouso , D. Castro , I. G. Foulds ,
 Computer, Electrical, & Mathematical Sciences & Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
 The University of British Columbia, School of Engineering, Vancouver, BC, Canada
The growth of the electronics industry demand better components for the electronic systems. Such components need to be improve to keep up with the evolution of the digital era. The loudspeaker design has not been changed for almost a century [1-5]. The acoustic transducer is the last analogue component needed for a true digital audio system. We want to validate the feasibility of using an ...
S. Prabhu , Nagbhushan ,
 Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India
Silicon based MEMS have wide applications in under water sensors. This work aims one such applications, hydrophone. Hydrophone detects the pressure variations of acoustic signals and noise in the water and produces an output voltage proportional to the pressure. Here the attempt is made to design and simulate MEMS based underwater acoustic sensor whose working is based on piezoresistive physics. ...
V. S. P. Rajesh ,
 St. Mary's Group of Institutions, Hyderabad, India
3D model of MEMS based SAW gas sensor is designed using Focused Inter Digital Transducers design. Surface displacement & Electrical potential are analyzed at resonance & anti-resonance frequencies. Operating frequency is from 8.7 MHz which acts as start band and 9.2 MHz as stop band. FIDT model helps in energy optimization by focusing the propagating wave more on to the poly-chemical coating. ...