Nvidia Flow is a volumetric fluid based simulation of a burning gas system. The user controls the 3 main factors of temperature, fuel, and smoke to create fire and smoke simulations.
Nvidia Flow requires a Nvidia GPU and Windows 10.
Read more here Nvidia Flow Artist Tools
The Graphics Processing Unit. This is the high-speed, many-core processor of the graphics card/chip that takes geometry, images and data from the CPU and creates images and processed data.