Multigrid-Poisson-Solver

The final project of the class Computational Astrophysics in NTU.

We modified the MG basic code from CME 342: Parallel Methods in Numerical Analysis at Stanford University (Thomas D. Economon)

Change the residual algorithm
Extend to V-W cycle
Change the ouput data path
Change the Poisson problem : Richardson Cascadic Multigrid Method for 2D Poisson Equation Based on a Fourth Order Compact Scheme, example 5 @doc_ref
Applied OpenMP (odd-even separation)
Applied MPI (half separation)
Extract and modify the SOR part to be the individual code (one iteration for one count)

Others

Add plot_gif.py file to visualize the exact solution, animation of solution with iteraction, error

Test

Name		Name	Last commit message	Last commit date
Latest commit History 45 Commits
doc_ref		doc_ref
failedtrial		failedtrial
figure		figure
mesh		mesh
old_version		old_version
sol		sol
test		test
README.md		README.md
compile.sh		compile.sh
mg_original.cpp		mg_original.cpp
mpi.sh		mpi.sh
multigrid_FMG.cpp		multigrid_FMG.cpp
multigrid_FMG.out		multigrid_FMG.out
multigrid_wcycle.cpp		multigrid_wcycle.cpp
multigrid_wcycle_Ws.cpp		multigrid_wcycle_Ws.cpp
multigrid_wcycle_Ws.out		multigrid_wcycle_Ws.out
multigrid_wcycle_recursive.cpp		multigrid_wcycle_recursive.cpp
multigrid_wcycle_recursive_Ws.cpp		multigrid_wcycle_recursive_Ws.cpp
multigrid_wcycle_recursive_Ws.out		multigrid_wcycle_recursive_Ws.out
note.text		note.text
plot_gif.py		plot_gif.py