S. Sahu, R. P .Bhattachryay, E. R. Kumar
Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, India.
There is limited option for non-intrusive flow measurement of liquid metals at high temperature. Liquid metal flowing in a conduit along with the transverse magnetic field induces emf in the liquid metal. The emf developed; which has linear dependency on flow velocity; can be used for flow velocity estimation. In case of conducting conduit the emf can be measured at the conduit wall. The main ...
H. Cabrera, D.A. Zanin, L.G. De Pietro, A. Vindigni, U. Ramsperger, D. Pescia
Laboratory for Solid State Physics, ETH Zurich, Zurich, Switzerland
A sharp tip approached perpendicular to a conducting surface at subnanometer distances and biased with a small voltage builds a junction across which electrons can be transferred from the tip apex to the nearest surface atom by direct quantum mechanical tunneling. Such a junction is used e.g. in Scanning Tunneling Microscopy (STM). When the distance d between tip and collector is increased ...
C. Horch, S. Schlayer, and F. Stallmach
Faculty of Physics and Earth Sciences, University of Leipzig, Leipzig, Germany
For low-field NMR (Nuclear magnetic resonance), NdFeB permanent magnet arrangements are proposed to provide the static polarizing magnetic field. Especially a parallel and a circular arrangement of the permanent magnets, iron yokes and small shim magnets were tested and improved by COMSOL. The intent was to guide the design and the construction of NMR magnets by calculating the magnetic field ...
M. C. Hollenbeck1,2, H. Zohdy2,3, R. Brower2, R. Ewing2, and K. Stevens1
1University of Utah, Salt Lake City, UT, USA
2AFRL/IFTA, Wright Patterson, OH, USA
3Oakland University, Rochester, MI, USA
The research presented here shows a multiphysics model for a polymerelectrolyte transistor (PET) simulated in COMSOL Multiphysics.Dynamic transient response and current-voltage characteristics are determined from multiple simulations of an alkaline-acid-alkaline PET in a common collector configuration, showing transistor activity in the ionic currents of the device. This shows that increasing ...
J. Osorio Moreno, M. Pullia, C. Priano
Fondazione CNAO, Pavia, Italy
Resistive magnets are one of the principal components of ion medical accelerator systems used in heavy ion cancer treatment. To fulfill medical requirements, like the size of irradiation field and an uniform dose distribution, some magnets of the transport beam line may require large aperture and a large region where the magnetic field is within specifications (good field region). After a ...
Computation of Capacitance, Inductance, and Potential Distribution of Integrated-Circuit Interconnects for Unshielded Four Conductors with Three Levels Systems
S.M. Musa, M.N.O. Sadiku, J.D. Oliver
Prairie View A&M University, Prairie View, TX, USA
In this paper an attempt has been made to design and analyze integrated circuit interconnects for unshielded four conductors with three levels system using Finite Element Method (FEM). The computational and simulation work has been carried out with help of COMSOL Multiphysics software. We illustrate that FEM is as accurate and effective for modeling multilayered multiconductor transmission lines ...
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. ...
Multiphysics Process Simulation of the Electromagnetic-Supported High Power Laser Beam Welding of Austenitic Stainless Steel
M. Bachmann, V. Avilov, A. Gumenyuk, M. Rethmeier
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
The application of an oscillating magnetic field on the high-power full-penetration laser beam welding process of a 20 mm thick stainless steel plate was numerically and experimentally investigated. In the simulations, three-dimensional heat transfer and fluid dynamics as well as electromagnetics were solved taking into account the most important physical effects of the process, namely the ...
Simulation of a Voltage Controlled Resistor Mimicking the Geometry of a MOSFET Device with Graphite Channel - new
M. Bhattacharjee, N. Mandal, H. B. Nemade, D. Bandyopadhyay
Indian Institute of Technology Guwahati, Guwahati, Assam, India
A Voltage Controlled Resistor (VCR) is simulated by replacing the semiconductor channel of a MOSFET device by graphite and embedding Si nanoparticles near the insulator-channel interface. The change in output drain current is found to depend on the thickness and relative permittivity of the insulator film together with the loading of Si nanoparticles. A material with higher dielectric ...
S. Roy, S. K. Pradhan, T. V. Shyam, B. S. V. G. Sharma,
 Atomic Energy Regulatory Board, Mumbai, Maharashtra, India
 Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
Carbon Steel pipes are used as feeder pipes in Pressurized Heavy Water Nuclear Reactors for carrying the coolant from the inlet headers to the coolant channel and again from outlet of the coolant channel to the outlet headers and are part of the Primary Heat Transport (PHT) System of Reactor. It has been observed that these feeders suffer from Flow Accelerated Corrosion (FAC) at the bends and ...