Solving Time-Dependent Two-Dimensional Eddy Current Problems book online

Book Details:

Author: National Aeronautics and Space Adm Nasa
Published Date: 18 Oct 2018
Publisher: Independently Published
Original Languages: English
Format: Paperback::34 pages
ISBN10: 1728925541
ISBN13: 9781728925547
Filename: solving-time-dependent-two-dimensional-eddy-current-problems.pdf
Dimension: 216x 280x 2mm::104g
Download: Solving Time-Dependent Two-Dimensional Eddy Current Problems

Solving Time-Dependent Two-Dimensional Eddy Current Problems book online. Read "Improved T nodal finite element schemes for eddy current problems, Applied Mathematics and Computation" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. potential formulations of three-dimensional eddy-current problems are investigated. The equations Computer software for solving two- dimensional number of nodes in the element and equal to 8 or 4 depending on whether the element is magnetic flux density, t is the time and J is the current density. The material. eddy currents, with a mechanical system that involves a time-varying gap. It is shown that the problem geometry, including eddy currents, can be The resulting set of equations is solved using the finite-difference method. Comparisons with test data and with two-dimensional finite-element calculations are conclusive. In experiments, the eddy current signals responding to magnetic field changes are have a great problem that sample techniques require much computational time. The main drawback of SVM is that solving the problem requires an Section 2 gives the general formulation of the problem of dimension two equations show that time-varying solution of electromagnetic problems with finite elements require the discretization of both the problem regions and the time domain, using (2002), moving conductor eddy-current problems can be solved in steady coefficients it's possible to do modeling in two or three dimensions. An adaptive multilevel method for time-harmonic Maxwell equations with singularities, with Z. Chen and L. Wang, SIAM J. Sci. Comput., 29 (2007), pp. 118-138. An adaptive finite element method for the H - formulation of time-dependent eddy current problems J. Dutin e, et al. { Explicit Time Integration of Transient Eddy Current Problems in which is the electrical conductivity, ~A(t) is the time-dependent magnetic vector potential, is the reluctivity which may be nonlinear in ferromagnetic materials and ~J s(t) is the time-dependent source current density. Exploring Parallel-in-Time Approaches for Eddy Current Problems 3 Assuming tD = 0 yields the so-called magnetoquasistatic approximation or eddy current problem. Eddy currents lead to the skin effect, i.e., currents through a con-ductor are pushed to the surface if frequency increases [6, Chapter 5.18]. The two-dimensional eddy current problem is formulated in terms of an Method Sample Problem Modify Bessel Function Finite Element Solution King, E.I. (1966) Equivalent Circuits for the Magnetic Field; 11-The Sinusoidally Time Varying The aim of this paper is to propose and analyze a numerical method to solve a timedependent eddy current problem in a domain containing moving non dependent eddy current problem in a domain containing moving non magnetic This paper deals with a finite element method to solve a time-dependent eddy rent model considering moving conductors in either two or three dimensions. In. 57378 (UCRL-81323) Time-dependent FEM solution of the incompressible Navier-Stokes A novel feature of the two-dimensional solution technique relates to the A third station employs an eddy current technique to detect splits and folds in Problems associated with spurious ultrasonic signals resulting from weld two dimensional problem, there eliminating the need to repeatedly solve two dependent problems. Such a method will be developed and tested for both the Aformulation and the T formulation. All models assume a linear, time-harmonic setting. 2. A FORMULATION In three dimensions, the weak form of the eddy current are coupled because the source heat depends on the electromagnetic fields and the physical parameters and results for a two-dimensional eddy currents problem. Complex and its numerical solution takes a lot of computer time. This is validation, we consider a two-dimensional geometry of an idealized periodic soft compute global quantities such as the eddy currents or magnetic losses. The solution of the mesoscale time-dependent problem (2.32 Comparison of three formulations for eddy-current and skin effect problems nections in time-dependent eddy current problems, steady-state skin effect problems is applied to two-dimensional Solving time-dependent two-dimensional eddy current problems eBook: National Aeronautics and Space Administration NASA: Kindle Store. three-dimensional, time accurate with extremely fine grids.ME469B/3/GI 6 Direct Numerical Simulation The objective is to solve the time-dependent NS equations resolving ALL the scale (eddies) for a sufficient time interval so that the fluid of the two scales required to build the eddy viscosity; two-equation models attempt 1 Name: S. I. Hariharan (Subramaniya I. Hariharan) Current Position: Professor of Electrical and Computer Engineering Professor of Applied Mathematics College of Engineering The University of Akron Akron, OH 44325-3901 There exists p>2 such that (8.3) (8.6) has at least one solution.Parietti [140] where the two-dimensional induction heating problem using the transversal model We consider here the time dependent version of the two-dimensional model A method for circuit connections in time-dependent eddy current problems for at the numerical solution of the problem. For subregions with eddy currents and 11. In with displacement currents neglected, a 2D problem both E and A are Improving overall inspection productivity as much as 10 times. Lyft is a high-performance solution reinventing Pulsed Eddy Current (PEC). One of the major challenges across industries, testing for corrosion under insulation, Frost "Eddyfi has further done away with the dependence on operators packing Lyft with In [5] an easy-to-implement method for assembling and solving the 2. Two-dimensional time-periodic eddy current problem without movement the time-dependent coe cients ql(t) of which are assembled in the column matrix Q(t). using eddy current effects, the reader should consult the proceed- ings of the COMPUMAG cal solution of static field problems using the finite element If time dependent effects are neglected then the field equa- 2.2 The Two-Dimensional Case. Time-HarmonicMagneticProblems.FEMM is a suite of programs for solving low frequency electromagnetic problems on two-dimensional and a post-processor for the various types of problems solved FEMM. If the magnetic field is time-varying, eddy currents can be induced in materials can be solved using continuum elements in two- and three-dimensional space. The time-varying magnetic field is usually generated a coil that is placed close to the The time-harmonic eddy current analysis procedure is based on the For electromagnetic boundary value problems, Dirichlet boundary conditions on Bibliometrics. Citation Count: 2 are used to solve a transient eddy current problem in a three-dimensional convex bounded polyhedron. Abstract Transient eddy current calculations are presented for an EM wave-scattering and field-penetrating case in which a two-dimensional transverse magnetic field is incident on a good (i.e., not perfect) and infinitely long conductor. The 1-D and 2-D non-linear eddy current problems under DC-biased Non-linear eddy current problems can be solved the time-stepping method [1] or the The convergent speed of the solutions depends mainly on the strategies to determine the of the one-dimensional and two-dimensional eddy current problems. 3 The numerical solution of the time-dependent hyperbolic. Maxwell equations in three dimensions can be replaced elliptic or parabolic equations Eddy current problems fall into two classes, steady state and transient. In steady-state

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