Estimation of Hydraulic Conductivity for a Heterogeneous Unsaturated Soil Using Electrical Resistivity and Level-Set Methods
T. K. Chou, M. Chouteau, J. S. Dubé
École Polytechnique de Montréal, Montréal, QC, Canada
École de Technologie Supérieure, Montréal, QC, Canada
The estimation of the soil saturated hydraulic conductivity (Ks) is crucial in understanding water flow and transport of contaminants. There are many hydrological techniques available in determining this parameter (constant head method, in-situ soil analysis, etc...). While these techniques can provide quality data points, they are often limited by sparse data sampling and scale. Therefore ...
H. Neubert, J. Ziske, R. Disselnkötter
Technische Universität Dresden, Institute of Electromechanical and Electronic Design, Dresden, Germany
ABB Corporate Research Center, Ladenburg, Germany
3D-modeling of magnetic components with FEM is challenging due to the involved nonlinearities and coupling effects between different physical domains. A specific issue is the consideration of lamination due to the high resulting element count for thin layers. Therefore, several homogenization approaches for laminated cores have been proposed which replace the laminated structure with a single ...
University of South Florida, Tampa, FL, USA
A two-dimensional atrial tissue model has been constructed in COMSOL Multiphysics® software to study the propagation of action potential and electrograms. The model presents the atrial electrograms recorded with a mapping catheter. A 2D atrial tissue model is simulated using the Courtemanche et al. cell model equations. PDE in coefficient form was used in COMSOL Multiphysics® to reproduce ...
A. Arevalo, S. Ilyas, D. Conchouso, I. G. Foulds[1,3]
Computer, Electrical & Mathematical Sciences & Engineering Division (CEMSE), King Abdullah University of Science & Technology, Thuwal, Saudi Arabia
Physical Sciences & Engineering (PSE), King Abdullah University of Science & Technology, Thuwal, Saudi Arabia
School of Engineering, University of British Columbia - Okanagan, Vancouver, BC, Canada
The simulation of a micromirror using polyimide as the structural material is presented. The simulation was used to verify the initial design parameters and to explore the different characteristics of the electromechanical device. For simulation simplicity the electrodes are integrated as part of the structural layer. The device thickness is 6 μm while the electrodes are 300 nm thick. For the ...
C. Falco, A. De Luca, S. Sarfraz, F. Udrea
University of Cambridge, Cambridge, UK
The aim of this work is to present a model capable to describe the behaviour of a thermal flow sensor under every physical aspect. A generic thermal flow sensor relates the flow properties with a variation in the temperature profile inside the device itself. Thus, it is locally heated up with a resistive element biased with an external current, surrounded by one or more temperature sensing ...
S. Das, J. Li, R. Hui
University of Kansas, Lawrence, KS, USA
Kansas State University, Manhattan, KS, USA
The adoption of micro- and nanostructured electrodes is a promising technique to improve the performance of Li-ion battery, which increases the electrode surface area and improves the efficiency of ion exchange between the electrode and electrolyte. This performance improvement is supported by the results of our numerical simulation based of a Li+ battery in COMSOL Multiphysics® software. The ...
Finite Element Modeling of Conventional and Pulsed Eddy Current Probes for CANDU® Fuel Channel Inspection
M. Luloff, J. Morelli, T. W. Krause
Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, ON, Canada
Department of Physics, Royal Military College of Canada, Kingston, ON, Canada
A pulsed Eddy Current (EC) probe, using the transient response to a stepped voltage is being developed for in-reactor inspection of CANDU® fuel channels. Pulsed EC has the advantage of generating a spectrum of discrete frequencies, allowing the simultaneous collection of data from a range of depths (i.e. takes advantage of multiple skin depths) that is unachievable by conventional EC, which ...
Electromagnetic Actuators Modeling, Simulation and Optimization: Review of Methods and Their Application for Switching Devices
O. Craciun, V. Biagini, G. Stengel, C. Reuber, C. Chao, B. Funieru , A. Binder
ABB Corporate Research, Ladenburg, Germany
ABB AG Calor Emag Mittelspannungsprodukte
TU Darmstadt, Department of Electrical Energy Conversion, Darmstadt, Germany
Electromagnetic actuators are representing one important component of ABB's medium voltage reclosers [1, 2]. Their performance is strongly influenced by the considered material properties as well as by the electronic control units that will power the actuator. Depending on the studied phenomena, different modeling, simulation and optimization methodologies are being used for medium voltage ...
H. Cabrera, D. A. Zanin, L. G. De Pietro, A. Vindigni, U. Ramsperger, D. Pescia
Laboratory for Solid State Physics, ETH Zürich, Zürich, Switzerland
In our recent experiments we are revisiting the topografiner technology for the imaging of surface topography with a resolution of a few nanometers. In these new technique called Near-Field Emission Scanning Electron Microscopy (NFESEM), low-energy electrons are emitted from a polycrystalline tungsten tip via electric-field assisted tunneling. In order to characterize and improve the capabilities ...
K. Burkes[1,2], E. Makram, R. Hadidi
Department of Electrical Engineering, Clemson University, Clemson, SC, USA
Savannah River National Lab, R&D Instrumentation, Aiken, SC, USA
COMSOL Multiphysics® software is used to model a water tree in tape shield and concentric neutral cables. It allows for the effect on electric field intensity at the tip of the water tree and electric potential due to the water tree to be better understood. Also, COMSOL is used to calculate the resistance and capacitance of a section of cable with a water tree as it grows across the insulation. ...