Explicit time integration of transient eddy current problems
Explicit time integration of transient eddy current problems
复制标题
瞬态涡流问题的显式时间积分
DOI:
10.1002/jnm.2227
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
G. Wimmer
中科院分区:
文献类型:
--
作者:
J. S. Dutiné;M. Clemens;S. Schöps;G. Wimmer
For time integration of transient eddy current problems, commonly implicit time integration methods are used, where in every time, step 1 or several nonlinear systems of equations have to be linearized with the Newton‐Raphson method because of ferromagnetic materials involved. In this paper, a generalized Schur complement is applied to the magnetic vector potential formulation, which converts a differential‐algebraic equation system of index 1 into a system of ordinary differential equations with reduced stiffness. For the time integration of this ordinary differential equations system of equations, the explicit Euler method is applied. The Courant‐Friedrich‐Levy stability criterion of explicit time integration methods may result in small time steps. Applying a pseudoinverse of the discrete curl‐curl operator in nonconducting regions of the problem is required in every time step. For the computation of the pseudoinverse, the preconditioned conjugate gradient method is used. The cascaded subspace extrapolation method is presented to produce suitable start vectors for these preconditioned conjugate gradient iterations. The resulting scheme is validated using the nonlinear TEAM 10 benchmark problem.
登录
查看更多内容
影响因子:
2.1
作者:
A. Kameari
通讯作者:
A. Kameari
影响因子:
2.1
作者:
T. Yioultsis;K. S. Charitou;C. Antonopoulos;T. Tsiboukis
通讯作者:
T. Tsiboukis
DOI:
10.1108/03321641111168039
发表时间:
2011
影响因子:
0.7
作者:
Clemens;Schöps;De Gersem;Bartel
通讯作者:
Bartel
影响因子:
2.1
作者:
O. Bíró;K. Preis
通讯作者:
K. Preis
影响因子:
2.1
作者:
M. Clemens;T. Weiland
通讯作者:
T. Weiland