Commercial CFD would take months for this | it’s just minutes with FluidX3D

This is a quick FluidX3D CFD simulation of the Boeing 757 at Re=100k. 912×1824×456 grid resolution, 100k time steps, 2h54min compute render time (~80min compute, ~94min render) on an A100 40GB GPU. Timestamps: 0:00 grid view 1:00 follow view 2:00 bottom view 2:59 side view 3:59 top view Since the last video I have added Smagorinsky subgrid turbulence model to get turbulence down to the resolution limit while still having a stable simulation. Rendering: velocity-colored Q-criterion at Q=. I wrote the FluidX3D software from scratch during the last 4 years. Here it’s standard lattice Boltzmann method (LBM), D3Q19, BGK collision, mid-grid bounce-back boundaries. For the box walls I use equilibriium boundaries. My implementation is ultra (memory) efficient with Esoteric-Pull streaming and FP16 memory compression, reducing memory demand to 55 Bytes/node, 1/3 of other FP32 implementations and almost doubling performance. This way I can get extreme resolution even on a single GPU with limited memory capacity. Compute efficiency on the Nvidia A100 40GB is ~79% at 16000 MLUPS/s. Esoteric-Pull: FP32/FP16 mixed precision: FluidX3D: #FluidX3D #OpenCL #CFD