I. Terechkine, T. Khabiboulline, D. Sergatskov
Fermi National Accelerator Laboratory, Batavia, IL, USA
Performance degradation of a superconducting RF cavity after quenching in an external magnetic field was calculated using COMSOL. This degradation is due to the increased resistance of a superconducting surface with trapped magnetic flux. The amount of the trapped flux depends on the size of the normally-conducting opening that develops in the superconducting wall of a cavity during quenching. ...
OSRAM SYLVANIA, Beverly, MA, USA
COMSOL Multiphysics is used to simulate natural convection and its impact on peak operating temperatures of solid-sate lighting in thermally adverse conditions. PDE modes in the general form are used in conjunction with a thin-surface conduction formulation in the weak form. COMSOL is used to predict both temperatures and heat flows through numerous components of the configuration. Model ...
P. Kumar , S. Kalra, A. Marwaha
Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India
The optimized design of a waveguide applicator has been proposed for superficial microwave hyperthermia using COMSOL Multiphysics 3.5a. In microwave hyperthermia cancer treatment body tissue is exposed to high temperatures using external and internal heating devices. Non-Invasive or external hyperthermia is used to treat tumors that are in or just below the skin (superficial). Non-invasive ...
Use of Simulation in the Development of Next-generation Measurement Standards for Radiation Dosimetry
R. E. Tosh, H. Chen-Mayer
NIST, Gaithersburg, MD, USA
Calibration of field instruments used in radiation treatment clinics is currently traceable to NIST primary standards via protocols involving static, flat-field radiation beams. By contrast, radiation beams prescribed for treating cancer incorporate temporal and spatial modulation strategies in order to maximize dose to the tumor while sparing healthy tissue. Differences in the detector ...
S. Kadam, T. Gulati, A. Datta
Indian Institute of Technology, Kharagpur, India
Cornell University, Ithaca, NY, USA
Kheer is a popular Indian dairy dessert prepared from concentrating milk with simultaneous cooking of rice grains. Conventional methods of preparing kheer have limited its mechanized production. Therefore, a conceptual design of continuous kheer-making machine has been prepared which among other components consists of a heating section for cooking kheer. The present study investigates the CFD ...
Computational Modeling of the Impact of Solar Irradiance on Chemical Degradation of Painted Wall Hangings in a Historical Interior - new
Z. Huijbregts, A. van Schijndel, H. Schellen, K. Keune, M. Eikema Hommes[3,4]
Eindhoven University of Technology, Eindhoven, The Netherlands
University of Amsterdam, Amsterdam, The Netherlands
Cultural Heritage Agency, Amsterdam, The Netherlands
Delft University of Technology, Delft, The Netherlands
The historic Hofkeshuis in Almelo (The Netherlands) locates a unique work of art: three walls in the rear salon of the private house are covered with an 18th century series of painted wall hangings (Figure 1). The simple and similar pigmentation of the paintings, their original hanging, and the few cleaning interventions make it possible to use the degree of the formation of lead soaps, so ...
Simulation of Helmholtz Resonators for Optical Gas Sensing: Comparison Between Pressure Acoustics and Thermoacoustics - new
B. Parvitte, C. Risser, R. Vallon, V. Zéninari
Université de Reims, Reims, France
Among optical gas sensing methods, photoacoustic (PA) spectroscopy combined with a laser source has proven to be a very robust and sensitive method for trace gas detection. COMSOL Multiphysics® software was used to calculate the frequency response of differential Helmholtz resonator cells in order to optimize the detection limit of PA sensors. Two different kind of simulation were performed: ...
A. Gil-Garcia, I. Kings, B. Al-Duri
University of Birmingham, School of Chemical Engineering, Edgbaston, Birmingham, UK
In clean coal technologies, improving energy conversion efficiency is one of the most important directions. Compared to traditional subcritical power plants, pressure-increased supercritical power plants improve the plant energy efficiency from 35% up to 45%. This work presents a study of the thermodynamic behaviour of the water cycle in coal-fired boilers in response to the changes in energy ...
H. Alrowais ,
 School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
This abstract introduces a sensor design for detecting angular acceleration in a single plane using thermal convection. The working principal of the device is based on probing temperature profile changes along a micro-torus caused by angular acceleration. By properly choosing the locations of the heaters as well as the temperature sensors, the output signal will correlate to in-plane angular ...
Toyota Research Institute of North America, Ann Arbor, MI, USA
Multiphysics optimization of thermal-fluid systems is an emerging area of interest with application to the development of high performance cooling technologies for electronic systems. This paper builds on previous work focused on the development of a computational platform for numerical optimization. Specifically, a sample optimized topology is briefly described, and the final result is ...