SPH Solvers and related

Resources:
[1] Code Catalog https://spheric-sph.org/sph-projects-and-codes
[2] GPUSPH https://www.gpusph.org/downloads/
Not compile by g++>4.9 (require Cuda)

$git clone https://github.com/gpusph/gpusph.git

$CC=/usr/bin/gcc-4.9 CXX=/usr/bin/g++-4.9 make

$make

[3] Crixus(Boundary definition) https://github.com/Azrael3000/Crixus

[4] C++ library that enables computations over a set of particles or points in N-dimensional space (cell list, kd-tree or hyper oct-tree) https://github.com/aboria/Aboria
[5] Previous to Aboria https://github.com/martinjrobins/SPH-DEM