The Finite Element Method for Problems in Physics

This course is an introduction to the finite element method as applicable to a range of problems in physics and engineering sciences. The treatment is mathematical, but only for the purpose of clarifying the formulation. The emphasis is on coding up the formulations in a modern, open-source environment that can be expanded to other applications, subsequently.

The course includes about 45 hours of lectures covering the material I normally teach in an

introductory graduate class at University of Michigan. The treatment is mathematical, which is

natural for a topic whose roots lie deep in functional analysis and variational calculus. It is not

formal, however, because the main goal of these lectures is to turn the viewer into a

competent developer of finite element code. We do spend time in rudimentary functional

analysis, and variational calculus, but this is only to highlight the mathematical basis for the

methods, which in turn explains why they work so well. Much of the success of the Finite

Element Method as a computational framework lies in the rigor of its mathematical

foundation, and this needs to be appreciated, even if only in the elementary manner

presented here. A background in PDEs and, more importantly, linear algebra, is assumed,

although the viewer will find that we develop all the relevant ideas that are needed.

The development itself focuses on the classical forms of partial differential equations (PDEs):

elliptic, parabolic and hyperbolic. At each stage, however, we make numerous connections to

the physical phenomena represented by the PDEs. For clarity we begin with elliptic PDEs in

one dimension (linearized elasticity, steady state heat conduction and mass diffusion). We

then move on to three dimensional elliptic PDEs in scalar unknowns (heat conduction and

mass diffusion), before ending the treatment of elliptic PDEs with three dimensional problems

in vector unknowns (linearized elasticity). Parabolic PDEs in three dimensions come next

(unsteady...