petsc4py-examples

Some examples for petsc4py and fenics. These examples are from the book: PETSc for Partial Differential Equations. I convert some C codes in this book to the python version.

To run the python code, you should install petsc. You can install it by conda

conda -c conda-forge install petsc petsc4py mpi4py matplotlib 

run the code by

mpiexec -np 4 python3 test_heat.py

The correspondin C codes are also given. You can compile the C code by the makefile.

Below are the summary of these files:

1. heat.cpp, test_heat.py: Solve the time-dependent heat equation in the Chapter 5 of the book.
2. pattern.c, test_pattern.py: Solve the coupled reaction-diffusion equations in the Chapter 5 of the book.
3. phelm.c, interclude, test_helmholtz.py: Solve the Helmholtz equation in the Chapter 9 of the book.
4. fenics_deal.II_step9.py: Solve the convection equation (step-9 of deal.II tutorial) by fenics.