If you do not yet have a comsol access account, please create one now. To put it more into perceptive it has a width and height. Panjiva uses over 30 international data sources to help you find qualified vendors of superconducting wire. Hi, i was trying to model a tape of superconducting material. When i wind it into a magnet, it is more like a disk coil, or racetrack coil. The tutorial, scheduled for distribution this year, is intended for undergraduate junior or senior level science students, and portions will also be. Finiteelement simulations of hysteretic alternating current losses in a magnetically coated superconducting tubular wire subject to an oscillating transverse magnetic field. Hysteresis losses in a twisted filamentary superconducting wire are calculated for various cases corresponding to complete penetration of the magnetic field into the wire, shielding of the field. Mtc superconducting wire mgb2 htc superconducting wire bismuth tape ybc engineering current density j eng j commercial. The primary goal of the thesis is to build a 1d numerical model representing a superconducting wire based on existing physical models. Finiteelement simulations of hysteretic alternating. Computing the inductance of a straight wire comsol blog. A summary of the tutorial series can be found in this blog post. Superconductor science and technology 2008 volume 21, number 10.
Comsol multiphysics software understand, predict, and optimize. A third book, the acdc module reference guide, contains reference material about application mode implementations and commandline programming. Within the wire, it increases linearly outwards from the centerline, and outside of the wire it falls off as 1r, where r is the radius. Included is a walkthrough on how to select the spatial dimension, physics, and.
Modelling superconducting wires in comsol multphysics. The entire geometry of the superconducting wire model. How can i simulate a superconducting transition in comsol. Ami superconducting magnets are typically wound using conductors comprised of many filaments of a superconducting material embedded in a copper matrix and twisted along its axis to insure optimum performance of the superconductor. Ac losses in coated conductors institute of physics. Comsol multiphysics and its gui but would like to learn more about how to set up a certain model. In the present work, a benchmark on the 3d numerical modeling of a superconducting bulk is introduced. Superconductivity by joe khachan and stephen bosi the discovery of superconductors the phenomenon of superconductivity, in which the electrical resistance of certain materials completely vanishes at low temperatures, is one of the most interesting and sophisticated in condensed matter physics. Modeling superconductivity in a ybco wire comsol blog. Manufacturers of superconducting wire and suppliers. Jan 16, 2015 watch this tutorial video to discover how using the model wizard simplifies setting up a comsol multiphysics model. Computation of superconducting wind turbine generators. It also provides you with a list of resources for more indepth technical information.
This manual gives you an introduction to modeling in femlab by taking you through the basic steps of the modeling process, from generating the geometry to postprocessing. The most basic of superconducting magnets is a simple solenoid in which a wire form of superconducting material is wound around a coil form. Their purpose is to assist you in learning, by example, how to model sophisticated electromagnetic components. The magnetic field, b, exists within and outside of the wire. Magnetic cloak is a special kind of magnetic shield, and the shielding effect itself is mostly given by superconducting part. Electric field of a charged sphere texas state university. First i performed a frequency domain study frequency. To model such a material, this example uses the magnetic field formulation physics interface. The model calculates current densityfield distribution in a superconducting wire in the presence of a timedependent transport current, background field or combination thereof. We took into account interference with normal and superfluid motions. In an attempt to unveil the impact of the material law selection on the numerical modelling and analysis of the electromagnetic properties of superconducting coils, in this paper we compare the four most common approaches to the ej power laws that serve as a modelling tool for the conductivity properties of the second generation of hightemperature superconducting 2ghts tapes. More in depth and advanced topics included with this tutorial are used to show you.
Simulation setup for modeling the thermal, electric, and magnetic behavior of high temperature superconductors. The wire is at the center, while the outer domain is air. Material property change rapidly with respect to temperature and magnetic field. Basic concepts and applications with matlab, maple, and comsol, 3 rd edition darrell w. The applications main executable file has a size of 126. You can also learn more about modeling cable systems by watching this archived webinar. Comsol multiphysics is a generalpurpose simulation software for modeling designs, devices, and processes in all fields of engineering, manufacturing, and scientific research. An adiabatic model has been constructed, to solve one of the five boundary value problems involved in the quench, both in ansys and in comsol.
Simulation of electrothermal transients in superconducting accelerator magnets with comsol multiphysics lorenzo bortot1, marco prioli1, arjan verweij1, bernhard auchmann 1, michal maciejewski1,2 1. This page only contains detailed info on how to remove comsol multiphysics 5. You can even use these entries as a starting point for your own. The effects that need to be taken into account are heat transfer, transport of water vapor, and fluid flow. Pdf simulation setup for modeling the thermal, electric. Simulation setup for modeling the thermal, electric, and magnetic.
The device is poled along the radial direction of the sphere, requiring the definition of a new local system of coordinates. So, to compute the magnetic field and the magnetic energy distributions we build a model based on maxwells equations, in this case amperes law. Submit a plot similar to figure 52 in the documentation. The text above is not a piece of advice to remove comsol multiphysics 5. This tutorial shows how to couple three physics interfaces to model evaporative cooling. Modeling of high temperature superconducting tapes, arrays and. The model calculates current densityfield distribution in a superconducting wire in the. Durrell, and jin zou, student member, ieee abstractdirect current dc characterization of high temperature superconducting hts coils is important for hts. Comparison of the ac losses of bscco and ybco conductors by means of.
Comsol lep tutorial for tank flow system two cstr in series. Modeling superconductivity in a ybco wire comsol multiphysics. Comsol access is a service we provide to our users and prospects. Because the direction of poling imparts anisotropy to the material response, it is critical. Introduction 5 introduction the acdc module is used by engineers and scientists to understand, predict, and design electric and magnetic fields in statics and lowfrequency applications.
Superconducting magnets components show highly nonlinear behaviour during a quench loss of superconductivity. Simulation setup for modeling the thermal, electric, and. When modeling a superconducting magnet, one of the challenges is accounting for the number of half turns. Presented results were obtained with assuming 10 um thick superconducting layer and 370 a of tapes critical current. Superconducting materials have zero resistivity up to a certain critical current density, above which the resistivity increases rapidly. Tutorial for running comsol files from comsol website. The quench propagation is modelled with the sequential coupled electric thermal analysis resulting in. Various configurations of split pair and multiaxis designs are possible through the use of multiple solenoids in series or operated independently to affect the magnetic forces on a. Tutorial for running comsol files from comsol website step 1. Magnetization of superconducting tube computed in 3d. Comsol lep tutorial for tank flow system two cstr in series step 1. Simulation of ac loss in high temperature superconducting cable. Because it has a different geometry than most other. Open chapter and click on comsol tab present in the bottom of the page step 2.
Abrahamsen 3 1 2 3 presented at the comsol conference 2009 milan motivation phd project. The new point matrix evaluation feature, a subnode to the derived values feature, makes it possible to evaluate a vector, matrix, or tensor in one or more points. It is available in html and pdf format from the comsol help desk. Currentvoltage characteristic and the ac losses of the coil were measured and compared with. Replacing bulk superconductors by the multilayer cc tape.
A superconducting wire like those often used in magnets. In addition to using multiphysics modeling for your own projects, you can also turn your models into simulation applications and. Mt241pobj08 1 dc characterization of a circular, epoxyimpregnated high temperature superconducting hts coil di hu, student member, ieee, mark d. To access any comsol files, you need to have a comsol account which can be created for free. Fast 2d simulation of superconductors comsol multiphysics. The geometry of coil created in comsol using acdc module is shown in fig.
Electrical insulation is provided by the insulation on the wire and by the epoxy between each turn. With comsol, it is also possible to observe the effects of temperature on the capacitance value. In superconductor science and technology, 2009, vol. Basics of superconducting magnets cryomagnetics, inc. Florida state university, tallahassee, fl continuous fields dc, resistive magnet up to 45 tesla university of florida, gainesville, fl continuous fields up to 21 t combined with some of the lowest. Vortex dynamics in type ii superconductors dachuan lu kuang yaming honors school, nanjing university. Capacitive sensor design using comsol provides the user with a wide variety of tools. Superconducting wire also known as superconducting strand is the basic element of the. May comsol multiphysics 3 enhancing transmission line performance. Well use the magnetic field formulation interface available in comsol multiphysics to simulate changes in current density and magnetic flux over time, which is measured from the moment that current begins flowing through the wire. Dc characterization of a circular, epoxy impregnated high. The wet surface feature is used to implement the source term for the water vapor and to.
This work was supported under grants apvv 150257 and 16 0418. Using simulation to optimize design the design of highvoltage transmission lines involves optimization under a complex series of economic, electrical, mechanical, and environmental constraints. Simulation of ac loss in high temperature superconducting. In this paper simulation of the alternating current loss ac loss in a high temperature superconducting tape and a hts cable having 4 layers of polygon conductors using comsol multiphysics software has been reported.
The user can simulate a design, test for the capacitance and observe the effects on capacitance by changing parameters such as dielectric permittivity of materials. The implementation in the commercially available fem software comsol is. This creates circular variable dependency, and thus cannot be modeled as easily as id like. Integgq fral equations for the current densit y in thin conductors and their solution b yy f the finiteelement method. For more information on how to work with the comsol multiphysics. Lets see how the flexibility and functionality of the comsol multiphysics software helped them to simulate this complex design. Femlab heat transfer tutorial rev rowan university. Can any one help me in modelling superconducting wires in comsol.
The problem is t ackled by five independent teams using six different numerical models. To model such a material, this example uses the magnetic field formulation physics interface the model was based on a suggestion by dr. Building an electrothermal model of a superconducting magnet. The application gallery features comsol multiphysics. Title of thesis quench simulation of superconducting magnets with commercial multiphysics software. Numerical modelling of quench behaviour in superconducting. The set of tdgl equations for superconductors with finite gap was used in full. Superconducting wire also known as superconducting strand is the basic element of the superconducting magnet coils. Magnetic flux penetration and ac loss in a composite superconducting wire with ferromagnetic parts. Geometry of this study is created in 2d axisymmetric space dimension. This feature, for example, enables the convenient display of tensor quantities at a point, which is particularly useful for modeling piezoelectric devices. Photograph of an example of a superconducting wire commonly used in magnets. Pulsed magnetic fields up to 100 tesla, single turn up to. For more information on how to work with the comsol multiphysics graphical user interface, please refer to the comsol multiphysics users guide or the.
Superconducting magnet with hts wire physics forums. The model calculates the penetration of the magnetic field in the crosssection of a superconducting wire in the critical state subjected to a transverse magnetic field. Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. The available the available study types are listed in table 11 with column definitions after the table. I have been performing some simulations in comsol using a cube 0. This tutorial shows how to model the acoustic waves generated in air by a hollow spherical piezoelectric material.
May 06, 2014 well use the magnetic field formulation interface available in comsol multiphysics to simulate changes in current density and magnetic flux over time, which is measured from the moment that current begins flowing through the wire. Set up the model environment in comsol multiphysics 18. Nonlinear, temperature dependent electrical and thermal parameters are assumed. Figure 3e shows the nbti type superconducting strand where tiny 7 m nbti filaments are bundled together in a number of hexagons and embedded in a copper matrix 1. Comsol multiphysics is a simulation platform that encompasses all of the steps in the modeling workflow from defining geometries, material properties, and the physics that describe specific phenomena to solving and postprocessing models for producing accurate and trustworthy results.
A superconducting wire with ratchet defects is designed to pump the vortices move in a speci c. Following the steps given in the documentation of the comsol heat conduction in a slab tutorial see next page. The simulation results for the single rectangular tape are verified with the norris equation for a hts tape. How to choose the superconducting material law for the. Analysis of quench propagation using coupled electrical. The current density in a superconductor, j s,isexpressedinterms of the difference between the vector potential of the actual. The bscco bulk materials is a good option for low dc magnetic field, however, for ac applications. A multimedia cdrom tutorial on the physics and engineering concepts of superconducting magnets for particle accelerators is being developed under a u. Physics procedia 36 2012 1195 a 1205 18753892 2012 published by elsevier b. Click on comsol access present at the bottom of the page.