Most of the 3DS Roms are for Citra emulators which are 3ds decrypted roms. If you download a 3DS game in CIA format, you can play the game on the Citra emulator which can be Run on most OS such as Windows, Android and etc.
Wowroms is a good option if you seek a simple and user-friendly ROM website. More than 30 emulators are available in Wowroms, which are safe to use and compatible with older computer operating systems.
This example is a refinement application with three grids: coarse (a) and two fine grids(b and d). There are four contact regions (cr) and two nesting layers because two different time-step sizes are required in roms_lake_jersey_nested_3g_abd.in: 041b061a72