Computational Fluid Dynamics (CFD) in Microsoft Flight Simulator
"The CFD currently proposed uses a default of 20 x 20 x 20 cubic voxels that englobe the aircraft. When enabled, the simulation will then solve a custom version of the Navier Stokes equations that includes upwind advection solving designed to cope with high fluid velocities. The CFD is solved over each of the voxels by the CPU at a rate of 100 times per second with three global passes per iteration. The load is spread over 5 different threads for minimal cpu impact." - MSFS SDK, 2023