The YUMMy is the 2D/3D moving mesh hydrodynamic simulation code that takes advantage of the unstructued shape of meshes, being generated by the Voronoi Tessellation. In the light of the unstructured mesh, the YUMMy adopted a scheme for reducing numerical diffusion and suggests mathematical formulations that precisedly evaluate exact amount of varied fluxes in the sense of numerically discretized scheme. The following images and movies are some of samples that help one to understand what the YUMMy makes.

 

The list of positive advantages of moving mesh over the conventional code are as followings.

1. Galilean Invariance even in the low resolution

2. Using arbitrary shape of reflective boundary condition

3. Highly compatible with the SPH and AMR code in terms of re-using outputs and initial data

4. Due to the large number of surfaces in each cell, evolve more accurate hydrodynamic physics than others

5. planetary simulation that has binary system(even more than 2) due to a coordinate-free