A. Amardas , and S. Dwivedi
 Institute for Plasma Research, Gandhinagar, Gujarat, India
 COMSOL Multiphysics Pvt. Ltd, Bangalore, Karnataka , India
In this paper, detail magnetostructural analysis of fusion grade superconducting toroidal field coils that are used in ‘tokamaks’ is presented. The stresses that arise due to Lorentz forces in large size superconducting coils that carry high currents are of catastrophic type in nature. These stresses are expected to influence the integrated performance of the magnet system. In this ...
V. Sharma, S. K. Dash, G. Vijaykumar, B. K. Nashine, B. Krishnakumar, P. Kalyanasundaram, and G. Vaidyanathan
Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India
Permanent Magnet Flowmeter (PMFM) is a non invasive device, which is used to measure the flow of electricallyconducting sodium in Fast Breeder Reactor Circuits. PMFM works on the principle of generation of motional EMF by magnetic forces exerted on the charges in a moving conductor. In this paper modeling of PMFM with different pipe sizes is done to predict the flowmeter output for a given ...
Electro-Thermal Analysis of a Contactor: Comparing the Performance of Two Braze Alloys during the Temperature Rise Test
E. Gutierrez-Miravete, and G. Contreras
Rensselaer at Hartford, Hartford, CT, USA
General Electric Co., Plainville, CT, USA
The purpose of this study was to develop mathematical models of the coupled electro-thermal process in selected, typical contactors that could then be validated and verified by comparing model predictions with the results of previous studies and with experimental data obtained during a temperature rise test. The study employed Finite Element Analysis using COMSOL to simulate coupled electro ...
J. Hrdlicka, P. Cervenka, and D. Snita
Institute of Chemical Technology Prague, Prague, Czech Republic
This contribution is devoted to the mathematical modeling of the AC electroosmotic micropumps in COMSOL Multiphysics and Matlab. The mathematical model involves the microchannel surroundings and several AC-voltage driving modes. The weak form has been used for handling singularities and other problems. The system dynamic behavior and conditions at the phase interfaces will be discussed.
E. Engström, B. Balfors, and R. Thunvik
Royal Institute of Technology, Stockholm, Sweden
In this study we evaluate transport, retention and subsistence of Escherichia coli (E. coli), a common fecal indicator bacteria, in a model (2x1m) of a constructed wetland. Transport occurs in the unsaturated and saturated zone. Inactivation is accounted for as a kinetic first-order process. Retention is assumed to be dominated by solid-air-water interface straining and is modeled with a kinetic ...
J. van Schijndel
Eindhoven University of Technology,
Eindhoven, The Netherlands
Jos van Schijndel completed his MSc in 1998 at the Department of Applied Physics at the Eindhoven University of Technology (TUe). In 2007 he obtained a PhD degree at the TUe on integrated heat, air and moisture modeling. Currently, he is assistant professor focusing on Computational Building Physics. His passion is creative computational modeling using state of art scientific software and ...
N. Bhalla, S. Li, and D. Chung
Chung Yuan Christian University, Chungli,Taiwan
National Tsing Hua University, Hsinchu, Taiwan
Investigation in this paper aims at performing Mechanical Stress Strain analysis, Thermal, Piezoresistive and Piezoeletric analysis of Silicon Structures using COMSOL. The simulation results have been cross checked by mathematical calculation.
A. Weddemann, D. Kappe, and A. Hütten
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge MA, USA
Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany
In principal, the calculation of the magnetic state inside a magnetic object requires the evaluation of the field in the entire unbounded space. With finite element methods restricted to finite domains, commonly auxiliary domains are employed which result in a non-physical cut-off. Not only that these additional domains result in an increased number of degrees of freedom which are strictly ...
C. Romao, and M. White
Dept. of Chemistry and Institute for Research in Materials
A series of 2-D finite element models of a ZrO2-ZrW2O8 composite system were created in COMSOL Multiphysics to study the effect of pores between the matrix (ZrO2) and filler (ZrW2O8) materials. Pores were modeled as ellipses concentric with the filler particles. Seventeen model geometries of varying microstructure were studied in order to determine correlations between microstructural ...
P. Oberdorfer, F. Maier, and E. Holzbecher
The efficiency of borehole heat exchangers (BHEs) for geothermal purposes depends not only on material properties but also on their geometrical design. These days most used design consists of two parallel arranged U-shaped pipes which are embedded in a high-conductive shell filling out the borehole. Another common design is a pipe inside of another pipe, with fluid flowing down inside and up ...