COMSOL Multiphysics® software: In order to solve this couple of partial differential equations along of a determined geometry, the finite element method (FEM) is a good technical tool. In this context we must solve a couple of no-linear partial differential equations along of the sample. Sehen Sie sich das Profil von Thierry Luthy im größten Business-Netzwerk der Welt an. In Sec. Magnetized stacks of commercial superconducting tapes will be applied in a rotor in place permanent magnets. Anistropic heat transfer in the stacks exacerbates the problem. Main tasks are Sales, support and training of COMSOL Multiphysics, a Finite Element Analysis tool for multiphysics problems. Unlike any other source in the field, this valuable reference clearly examines key aspects of the finite element method (FEM) for electromagnetic analysis of low-frequency electrical devices. EVOLUTION FROM 2D TO 3D The early studies based on the H-formulation mostly employed two-dimensional models, simulating the trans-verse cross section of long superconductors with the current This book provides readers with numerical analysis techniques to model the magnetisation of bulk superconductors based on the finite element method. Theoretically, an unlimited amount of current can flow through . introduction of higher performance superconductors, such as Nb3Sn or MgB2. Results: In this section I show the magnetic field penetration for type I and type II mesoscopic superconductors. Verweij and taken from their COMSOL Conference 2016 Munich paper.. It is useful for simulating a range of practical devices, including bipolar transistors, metal . The COMSOL software uses this method and allows even not experts in FEM work in high level problems. In this work I have used the PDE, Coefficient Form interface. The second file ("SMB_2G_STACKS_test_6_to_10.m") models the SMB built with 2G stacks and can be used to . The book provides the knowledge in the field of applied superconductivity in a comprehensive way. This book presents the basics and applications of superconducting magnets. IVA atwo-domain simulation capable of correctly modeling spatially nonuniform magnetic fields and the response screening cur-rents of the superconductor is described, and simple examples along with the journal quartile ranking will be released. Right: Cable layout. Found inside – Page iiIntense recent activity in the field of high-temperature superconductivity both in Japan and in the rest of the world was discussed at the First International Symposium on Superconductivity held in Nagoya in August 1988. I want to enter the conductivity of superconductor in cst but according to this paper, it is complex and depend on the angular frequency of incident terahertz wave. I have taken free tetrahedral mesh with mesh size finer for three wider domains and free tetrahedral mesh with mesh size extremely coarse for rest thinner domain and I got the following massage. Particular functionality may be common to several products. In this paper, we solve the TGDL equations for a spatially . Can any one help me in Modelling superconducting wires in COMSOL multphysics ? The results of the numerical analysis will be used in the design and manufacturing the stacks for the motor demonstrator. The finite element analysis performed in COMSOL indicated that the torque values established on the rotors of the magnetic gear increased with increasing the depth without changing the efficiency of the gear mechanism. All rights reserved. In this . Written by a leading expert on the electromagnetic design and engineering of superconducting accelerator magnets, this book offers the most comprehensive treatment of the subject to date. 3 comments. Superconductors for power applications: an executable and web application to learn about resistive fault current limiters (COMSOL 5.5). save. as COMSOL Multiphysics [24], Matlab [30], FlexPDE [31], home-made FEM codes such as Daryl Maxwell [32], and open-source environments such as GetDP [33]. Found inside – Page 166Superconductor Science and Technology 20, 292–295 (2007). http://dx.doi.org/10.1088/0953-2048/20/3/031. ... COMSOL. “COMSOL Multiphysics.” (2013). (Cited on page 43) Cooper, L.N. “Bound Electron Pairs in a Degenerate Fermi Gas.”. Sergei Sergeenkov. 14th Jan, 2015. ∂Ψ/∂t=-(i/k ∇+A)^2 Ψ+(1-T)Ψ(1-〖|Ψ|〗^2 ) Here is one possibility (follow the link) based on using the Magnetic Field Formulation interface (available in COMSOL . Superconducting fault current limiter (SFCL) has become one of the most ideal current limiting devices to solve the problem of increasing short-circuit current in high-voltage power grid. (4,5,7), Warning 4: Generated some elements of low quality (0). the pointwise constraint function provided by COMSOL, equation (8) can be applied to any superconducting subdomain. This Chapter will introduce, in a simple way, the basic concepts of superconductivity required to start modeling of superconducting electronics devices. High-Temperature Superconductors (HTS) can be superconducting in liquid nitrogen (77 K), holding immense promises for our future. COMSOL CONFERENCE 2019 Bangalore, November 28-29, Prashant Kumar, BARC, Mumbai 28-11-2019 2. The fluxoids penetrate the superconductor so as to minimize the total free Gibbs energy: whereas Type I superconductors are diamagnetic, the fluxoid field is paramagnetic, with fluxoid penetration when The field in the sample is a function of the fluxoid Cross-sectional density: 4 Review Vortex flux lattice in V 3 Si STMFermi-level conductance . Overall System Layout SC Magnet 1 B. Modeling Superconductivity in a YBCO Wire. The superconductors refuse the penetration of magnetic field into its interior, it is the well know Meissner effect, B=0 into the superconductor sample. The electromagnetic modeling of superconductors by finite-element method . Application Engineer at COMSOL AS in Norway. al., "COMSOL Implementation of the H-ϕ-Formulation With Thin Cuts for Modeling Superconductors With Transport Currents", IEEE Transactions on Applied Superconductivity, volume 31, no. How can I enter the superconductor parameters, for example conductivity, in cst? © 2008-2021 ResearchGate GmbH. Found inside – Page 250The design of the cable was worked out by making FEM calculations using COMSOL software tool. The configuration of the tapes within the strands was such that the influence of the magnetic field is minimized. The tapes were oriented such ... The book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB2 superconductors. Huang-Mi LMing Lee, Jia-Hong Shyu, Lance Horng, Jong-Ching W"T bl til ti fWu, "Tunable optical properties of a superconducting Bragg reflector", submitted to Thin Solid Films (2010) (Invited talk at ICAUMS 2010, December 5-8, Jeju Island, Korea) The thesis begins with a historical overview of topological condensed matter physics, placing the work in context, before introducing the generalized form of Bloch's Theorem. The dark region represents the magnetic field, while the clear region represents the superconducting region. Found inside – Page 120The numerical analysis of the models has been implemented in the commercial software COMSOL Multiphysics®. ... is possible to calculate the cooling power PHTS (Eq. 6.1) and the transfer length at the interfaces normal/ superconductor. The implementation in the commercially available FEM software Comsol is shown together with the underlying equations used in the simulation setup together with some exemplary simulations.Additionally, some interesting results regarding the penetration behavior of current density and electric field of high temperature superconductors are shown. superconductors can be simulated by using B=μ0H [9]. share. Found inside – Page 13As stated at the outset of this chapter, superconducting magnet technology is interdisciplinary in that it requires ... Most design teams have access to codes such as ANSYS, Vector Fields, COMSOL, all of which are applicable for ... In Figure 1, we can see a mesoscopic superconductor type I. We simulate three different models in 2-D and 3-D using superconducting filaments and tapes, and show that the results are in very good agreement with the H-A and H-formulations. This book introduces readers to the characteristic features of electromagnetic phenomena in superconductivity. Images by L. Bortot, M. Maciejewski, M. Prioli, A.M. Fernandez Navarro, S. Schöps, I. Cortes Garcia, B. Auchmann, and A.P. Found inside – Page 705Oestergaard J, Okholm J, Lomholt K, Toennesen O (2001) Energy losses of superconducting power transmission cables in the grid. IEEE Trans Appl Supercond I(March):2–5 7 ... Proc COMSOL Conf 2(1) 16. Noji H (2007a) Self-field losses in 1m ... This accessible textbook offers a novel, concept-led approach to superconducting electronics, using the COMSOL Multiphysics package to help describe fundamental principles in an intuitive manner.Based on a course taught by the author and aimed primarily at engineering students,. In Figure 1, we can see a mesoscopic superconductor type I. Introduction: One of the main characteristic of the superconductors is its diamagnetic response of applied magnetic fields. Universidade Federal da Paraíba. In this paper, by using the finite element simulation software COMSOL Multiphysics® software, the characteristics of coated superconductors in the presence of travelling magnetic fields generated by three-phase alternating current are studied. Please note, this webinar will take place live and will not be recorded. Much recent TDGL work has focused on spatially uniform external magnetic fields and largely ignores the Meissner state screening response of the superconductor. A COMSOL Multiphysics® model is developed for ideal type II superconductor with Ginzburg-Landau (GL) parameter κ~50 typical for practical high field, high current superconductors The model is validated by computing magnetization of such superconductor for every value of external magnetic field and comparing it to that of Brandt [2] Excellent agreement between these through the entire . (17, 19, 22, 24, 32, 34, 59, 60, 62, 63, 68, 69), Warning 2: Face is (or has a narrow region that is) much smaller than the specified minimum element size. In a 2D model of a high-temperature superconductor wire in COMSOL, a pointwise constraint can be added to a point on the circumference to include the current passing through the superconductor wire. User defined elements in ANSYS allow for programming the generation of the finite element matrices, providing the opportunity to implement new formulations and material property fits. Theoretically, an unlimited amount of current can flow through . Found inside – Page 136... current calculations were performed with a FEM model within the commercial software COMSOL. Figure A.3 shows geometric model that was used for the CroCos and the magnetic eld distribution of the CroCo at its critical current. I want to plot B-H curve of a toroidal transformer. In this contribution the description of the numerical model of the rotor and the examples of results are presented. 2020 Implementation of the H-ϕ Formulation in COMSOL Multiphysics for Simulating the Magnetization of Bulk Superconductors and Comparison With the H-Formulation The trapped magnetic field is thus decreased, potentially leading to the deterioration of the obtainable power output. In this work, we demonstrated that thin cuts are a simple and efficient method of making non-conducting domains simply connected in the H-ϕ-formulation to model superconductors in COMSOL Multiphysics. The rotor will be cooled with liquid hydrogen down to approximately 20K to provide favorable conditions for the superconductors. In this work I have used the PDE, Coefficient Form interface. Aimed at first-year electrical engineering and physics courses at the graduate level, this book introduces theories useful for practical analysis, providing an understanding and the basis for a variety of applications. Im Profil von Thierry Luthy sind 5 Jobs angegeben. Found inside – Page 410... mechanisms and calculate the AC loss of superconductors. In this paper, a finite element method (FEM) numerical model of HTS is established based on H-formulation and solved by the finite element software Comsol Multiphysics. Found insideThe genesis of the NATO Advanced Study Institute (ASI) upon which this volume is based, occurred during the summer of 1986 when we came to the realization that there had been significant progress during the early 1980's in the field of ... The stacks in the context of the machine operation exhibit interesting thermal and electromagnetic behavior. I want to know about the "MONTH in 2021" , When JCR I.F. Modeling of HTS Surrounded by Magnetic Components Using H-φ Formulation (COMSOL 5.5). by Lexi Carver. Operated at 1.9 K above absolute zero, the material properties of superconductors and super-fluid helium vary by several orders of magnitude over a range of only 10 K. how can I do it? This book describes, as simply as possible, the mechanisms of scattering (both elastic and inelastic) of electrons with solid targets (electron–atom, electron–plasmon, and electron–phonon interactions). In this paper, by using the finite element simulation software COMSOL Multiphysics® software, the characteristics of coated superconductors in the presence of travelling magnetic fields generated by three-phase alternating current are studied. In Figure 1, we can see a mesoscopic superconductor type I. In this paper, AC loss in an elliptical Ag sheathed Bi2223 (HTS) tape is calculated using the time dependent PDE mode of COMSOL Multiphysics. Abstract: This paper reviews the modeling of high-temperature superconductors (HTS) using the finiteelement method (FEM) based on the H-formulation of Maxwell's equations. Found inside – Page 7Superconducting Electronics via COMSOL Modeling Armen Gulian. ). to the surface of superconductor: B(x) = (0, By In that case, (1.13) is always satisfied. To simplify further consideration, we can rotate the local reference frame ... Found inside – Page 97The numerical calculations are done with the commercial FEM program Comsol in a two dimensional magneto static model. ... potential A. Bean's model of the critical state [Bea62] is used to describe the superconductor's properties. and must satisfy the boundary conditions, International Conference on High Voltage Engineering DEIS has technically co sponsored this conference since its inception in 2008 Now, ICHVE is a fully sponsored DEIS event held every 2 years, once in China and once elsewhere in the world ... To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation . Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team. Found inside – Page 131By integrating the critical current of the superconducting tape and the flux density into the E-J power law, the electric field E j of the jth turn is calculated as ... To calculate this critical current, 2D analysis in Comsol is used. 140_-_Coupled_Electromagnetic-Thermal_Model_of_a_Superconducting_Motor.pdf. One powerful theory to understanding the superconductivity is the Ginzburg-Landau (GL) theory. What I tried to do was make an antenna tuner on the loop antenna with 13.56MHz. This part covers more advanced topics, including the BCS-Gor'kov-Eliashberg approach to equilibrium properties of superconductors, the derivation of kinetic equations for nonequilibrium superconductors, and the derivation of time-dependent Ginzburg-Landau equations, used as the basis for COMSOL modeling in the first part. This part covers more advanced topics, including the BCS-Gor'kov-Eliashberg approach to equilibrium properties of superconductors, the derivation of kinetic equations for nonequilibrium superconductors, and the derivation of time-dependent Ginzburg-Landau equations, used as the basis for COMSOL modeling in the first part. The superconductor has a smoother transition to the normal state and its behavior is closer to that of an ohmic material (n = 1). Can we calculate magnetic moment from Saturation magnetisation for perovskite manganites using relation. Reference article: Alexandre Arsenault et. The third method is to model the superconductor and permanent magnet in the magnetic field formulation (mfh) module of COMSOL Multiphysics®, and then describe the relative motion by setting a moving mesh. Found inside – Page 1003The commercial software COMSOL [ 12 ] was used for analysis . FIGURE 5 shows the meshes in the superconductor , normal conductors and their neighboring regions used in the analysis of MODEL 4. Fine meshes were created in the ... Found insideHigh voltage engineering is extremely important for the reliable design, safe manufacture and operation of electric devices, equipment and electric power systems. Found insideThis book contains the edited versions of the papers presented at the Second International Workshop on Electric and Magnetic Fields held at the Katholieke Universiteit van Leuven (Belgium) in May 1994. Superconductivity is known since about one century, and its last decades' evolution is making it . In Figure 2, we see a type II superconductor. I apply an external current which I increase in a parametric sweep. 1) The input current to the primary winding, 2) The output Voltage of the secondary winding. However, the computational efficiency of using H-formulation is low because the eddy current effect in non-superconductors has This approach is shown to be easily implementable in the COMSOL Multiphysics finite element program, already widely used by the applied superconductivity community. Comparison with experimental data is provided when possible. In the normal state a good description of the low-frequency response is obtained with a superposition of two Drude components of which one has a very low scattering rate (narrow Drude peak) and the other a rather large one (broad Drude peak)... Join ResearchGate to find the people and research you need to help your work. The H-formulation, used abundantly for the simulation of high-temperature superconductors, has shown to be a very versatile and easily implementable way of modeling electromagnetic phenomena involving superconducting materials. Project manager at COMSOL AS in Norway, software development of tools for economic analysis and modeling for the Oil and Gas industry. P.S. 6, July, 2021 Using COMSOL to simulate superconductors. Back to Events Calendar. In the motor the magnetized stacks are subjected to time-varying magnetic fields. I've tried to make the superconductor conductivity dependent on the mean current density inside the filaments but I don't know how. ×ρ ×+ . Two user defined elements were created as a new method for simulating coupled, multiphysics behavior of superconducting magnets. Coupled Electromagnetic-Thermal Model of a Superconducting Motor. ∇×A=B_a the implementation of the TDGL simulation in COMSOL MUL-TIPHYSICS simulation software with all appropriate boundary conditions is summarized in Sec. 1/σ ∂A/∂t=1/2iκ (Ψ^* ∇Ψ-Ψ∇Ψ^* )-|Ψ|^2 A-∇×∇×A, Magnetized stacks of commercial superconducting tapes will be applied in a rotor in place permanent magnets. It causes demagnetization and heat generation. This accessible textbook offers a novel, concept-led approach to superconducting electronics, using the COMSOL Multiphysics software to help describe fundamental principles in an intuitive manner. However, the superconductors exhibits energy loss known as AC loss when exposed to time varying external magnetic field and/or transport current. The maximum running speed of evacuated tube side-suspended high-T c superconductor (SS-HTS) maglev loop system is only 160 km/h due to the limitation of running loop radius. I create the function for the conductivity dependence of the superconducting filaments but I don't know how to link this dependence with the mean current density inside the filaments. COMSOL Implementation of the H-$\phi$-Formulation With Thin Cuts for Modeling Superconductors With Transport Currents September 2021 IEEE Transactions on Applied Superconductivity 31(6):1-9 Comsol files (version 4.3): here. IEMECON 2017 will provide an opportunity for researchers, educators and students to discuss and exchange ideas on issues, trends, and developments in Industrial Automation and Electromechanical Engineering The conference aims to bring ... I used to run simulation for the antenna with lumped port till very recently. Verweij and taken from their COMSOL Conference 2016 Munich paper.. Auf LinkedIn können Sie sich das vollständige Profil ansehen und mehr über die Kontakte von Thierry Luthy und Jobs bei ähnlichen Unternehmen erfahren. Which month in 2021, JCR impact factor and Quartile Ranking of Journal will be released? How to plot/calculate B-H curve from input current and output voltage of a transformer? COMSOL Day: Simulation in Academic Research and Education See what is possible with multiphysics simulation. The COMSOL software uses this method and allows even not experts in FEM work in high level problems. By assigning a mesh size for each subdomain, the TM method can automaticallymesh the whole modelwith tetrahedral elements. Depending on a single parameter in TDGL equations the dynamics of superconductors in magnetic fields will be . Found inside – Page 132G. R. Berdiyorov, M. V. Milošević, and F. M. Peeters, Spatially dependent sensitivity of superconducting meanders as ... IEEE Transactions on Applied Superconductivity 17, 298, 2007. http://www.comsol.com. http://www.lumerical.com. Hey all, I'm a student doing a research project on superconductor levitation, particularly in maglev trains. We apply time-dependent Ginzburg-Landau (TDGL) numerical simulations to study the finite frequency electrodynamics of superconductors subjected to an intense rf magnetic field. The Semiconductor Module provides dedicated tools for the analysis of semiconductor device operation at the fundamental physics level. However, the simulation of a full vector field in current-free domains unnecessarily adds degrees of freedom to the model, thereby increasing computation times. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors. Two kinds of superconductors were simulated, YBCO bulks and stacks of 2G wires. Found inside – Page 148COMSOL. COMSOL Multiphysics v. 5.3 51. Wüchner S, Keller N, Tholence JL, Flouquet J (1993) Magnetic properties of the heavy- fermion superconductor UPt3 and URu2Si2 . Solid State Commun 85(4):355–360 52. Pollini A, Mota AC, Visani P, ... Using this same method we could study penetration of magnetic field in mesoscopic sample with defects [1]. Best method for adding colour to COMSOL geometries? Particular functionality may be common to several products. The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries.