کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9667174 | 863120 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effective simulation of a macroscopic model for stationary micromagnetics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
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چکیده انگلیسی
The effective behaviour of stationary micromagnetic phenomena is modelled by a convexified Landau-Lifshitz minimization problem for the limit of large and soft magnets Ω without the exchange energy. The numerical simulation of the resulting minimization problem has to overcome difficulties caused by the pointwise side-restriction â£mâ£Â ⩽ 1 and the stray field energy on the unbounded domain Rd. A penalty method models the side-restriction and the exterior Maxwell equation is recast via a nonlocal integral operator P. As shown in [Numer. Anal. Macrosc. Model Micromagnet, submitted for publication; Analysis, Numerik und Simulation eines Relaxierten Modellproblems zum Mikromagnetismus, doctoral thesis, Vienna University of Technology, 2003], the discretization leads to a nonlocal problem with piecewise constant ansatz and test functions and (dense) stiffness matrices with closed form formula for their entries. This paper addresses the numerical solution with Newton-Raphson schemes and the scientific computation of effective micromagnetic simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 194, Issues 2â5, 4 February 2005, Pages 531-548
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 194, Issues 2â5, 4 February 2005, Pages 531-548
نویسندگان
Carsten Carstensen, Dirk Praetorius,