Adaptive mesh refinement
https://en.wikipedia.org/wiki/Adaptive_mesh_refinementMoving Mesh Methods
http://lsec.cc.ac.cn/lcfd/MMM_mem.htmlMoving Mesh Methods for Computational Fluid Dynamics
http://www2.cscamm.umd.edu/publications/hangzhou_CS-05-04.pdfGalilean-invariant cosmological hydrodynamical simulations on a moving mesh