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Introduction to the Finite Element Method in Electromagnetics (Paperback)
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Introduction to the Finite Element Method in Electromagnetics (Paperback)
Series: Synthesis Lectures on Computational Electromagnetics
Expected to ship within 10 - 15 working days
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This series lecture is an introduction to the finite element method
with applications in electromagnetics. The finite element method is
a numerical method that is used to solve boundary-value problems
characterized by a partial differential equation and a set of
boundary conditions. The geometrical domain of a boundary-value
problem is discretized using sub-domain elements, called the finite
elements, and the differential equation is applied to a single
element after it is brought to a "weak" integro-differential form.
A set of shape functions is used to represent the primary unknown
variable in the element domain. A set of linear equations is
obtained for each element in the discretized domain. A global
matrix system is formed after the assembly of all elements. This
lecture is divided into two chapters. Chapter 1 describes
one-dimensional boundary-value problems with applications to
electrostatic problems described by the Poisson's equation. The
accuracy of the finite element method is evaluated for linear and
higher order elements by computing the numerical error based on two
different definitions. Chapter 2 describes two-dimensional
boundary-value problems in the areas of electrostatics and
electrodynamics (time-harmonic problems). For the second category,
an absorbing boundary condition was imposed at the exterior
boundary to simulate undisturbed wave propagation toward infinity.
Computations of the numerical error were performed in order to
evaluate the accuracy and effectiveness of the method in solving
electromagnetic problems. Both chapters are accompanied by a number
of Matlab codes which can be used by the reader to solve one- and
two-dimensional boundary-value problems. These codes can be
downloaded from the publisher's URL:
www.morganclaypool.com/page/polycarpou This lecture is written
primarily for the nonexpert engineer or the undergraduate or
graduate student who wants to learn, for the first time, the finite
element method with applications to electromagnetics. It is also
targeted for research engineers who have knowledge of other
numerical techniques and want to familiarize themselves with the
finite element method. The lecture begins with the basics of the
method, including formulating a boundary-value problem using a
weighted-residual method and the Galerkin approach, and continues
with imposing all three types of boundary conditions including
absorbing boundary conditions. Another important topic of emphasis
is the development of shape functions including those of higher
order. In simple words, this series lecture provides the reader
with all information necessary for someone to apply successfully
the finite element method to one- and two-dimensional
boundary-value problems in electromagnetics. It is suitable for
newcomers in the field of finite elements in electromagnetics.
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