O. Chellaï , S. Alberti , I. Furno , T. Goodman , M. Baquero 
 Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Suisse
In magnetically confined fusion devices, electron cyclotron resonance heating (80-170 GHz) is characterized by a local RF-power deposition at the electron cyclotron resonance . A mm-wave RF Gaussian beam is launched from a dedicated antenna and propagates through the highly turbulent scrape-off layer (SOL) at the edge of the confined plasma. Turbulence in the SOL is characterized by ...
J. Chen, K. Pitchai, D. Jones, J. Subbiah
University of Nebraska-Lincoln, Lincoln, NE, USA
Introduction: Domestic microwave ovens are widely used to heat food products, because of rapid and convenient heating. Nonuniform heating is the biggest issue in microwave heating process, which also causes food quality and safety issues. Microwave heating models are promising tools to assist in developing food products that deliver uniform heating. Due to intensive heating, moisture evaporation ...
S. Savarese , L. Kremer , C. Sanjeu 
 Armelio, Les Ulis, France
While addressing the pressing need for better, more sustainable engineering and production improvements, Armélio has identified that easy-to-use, customized, multiphysics applications would fulfill customer requirements. Hence, we now design and deliver COMSOL Multiphysics® apps bringing multiphysics simulation into research labs and production plants. Applications range from heat transfer ...
J. T. Fong ,
 National Institute of Standards & Technology, Gaithersbug, MD, USA
1. INTRODUCTION. In a magnetic resonance imaging (MRI) system (see Fig. 1), it is necessary to excite the nuclei of a patient into coherent precession for imaging. This requires coupling between the nuclei and a source of radio frequency (RF) power (the transmitter). To receive a meaningful signal, one also needs to couple the nuclei to an external circuitry (the receiver). These two ...
Institute of Physics CAS
Chiral SPPs can be generated by linearly polarized light incident at the end of a nanowire, exciting a coherent superposition of three specific nanowire waveguide modes. Chirality is preserved in the emitted photons, creating a subwavelength ¼ wave plate.
S. Singh, A. Marwaha
Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India
Electromagnetic wave analysis of waveguide has been done in this paper with the help of Finite Element Method (FEM) based COMSOL Multiphysics. The design is further extended by placing conductor on a dielectric slab included in the waveguide to form a shielded microstrip transmission line. The simulated models are analyzed to determine the wave propagation characteristics. The validation is ...
J. Jimenez-Lozano, P. Vacas-Jacques, W. Franco
Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
Radiofrequency (RF) technology offers unique advantages for noninvasive selective heating of relatively large volumes of tissue. In this work, we present a mathematical model for selective non-invasive, non-ablative RF heating of cutaneous and subcutaneous tissue (with detailed fiber septa structures) including their thermo-elastic response. Our analysis shows that the fiber septa architecture ...
Siram Sai Krishna, Nuti Venkata Subrahmanya Ayyappa Sai, Dr.K.Srinivasa Rao
Lakireddy Bali Reddy College of Engineering, Mylavaram, Andhra Pradesh, India
Professor & HOD, Dept. of Electronics and Instrumentation Engineering, Lakireddy Bali Reddy College of Engineering, Mylavaram, Andhra Pradesh, India
The Micro electro mechanical systems (MEMS) technology provides us a platform to interface between mechanical and electrical components. In this paper, we have designed MEMS accelerometer based on piezoelectric property, and simulated using COMSOL Multiphysics®. The design, which has PZT kept in the annular diaphragm, provides good sensitivity. When this accelerometer is subjected to stress ...
Coupled Electromagnetic and Heat Transfer Simulations for RF Applicator Design for Efficient Heating of Materials
C. Thiagarajan, J. Anto
ATOA Scientific Technologies Pvt Ltd, Whitefield, Bangalore, Karnataka India.
Conventional heating of material wastes energy during heating due to inherent radiation, conduction and convection based heating mechanism. Alternate efficient heating methods are actively researched for improved efficiency. Radio frequency based electromagnetic heating is increasingly used for efficient heating in place of conventional heating. This requires coupling of electromagnetic and heat ...
E. C. Luz
Universidade Federal do Pará, Belém, PA, Brazil
The Marine Controlled Source ElectroMagnetic (marine CSEM) is a geophysical method used by the oil industry to investigate resistive targets in the sediments under the ocean floor. In this work we simulate marine CSEM data including 1D, 2.5D and 3D modeling. The results obtained with COMSOL Multiphysics show themselves as a promising tool for the studies of electromagnetic methods in prospecting ...