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Does Ansys Fluent with a Native GPU Solver Live Up to the Hype?
Test 3 – Compressible Flow in Generic Combustor
In this scenario, the flow reached Mach 1. It is important to note that currently, simulating a strong shock wave
isn't possible, but that capability may be coming soon. This test is based on 24 million cells and was run on
an RTX 8000 with 48 gigs of RAM. No GPU double precision was run due to memory shortage. The meshing
topology used is poly-hex, which is becoming more and more prevalent nowadays. The GPU was equivalent to
about 90 CPU cores in this test, the fastest speed achieved in this study.
This test demonstrated that the GPU was the equivalent to a blistering 90 CPUs. We expect that the mesh
topology along with the large number of cells allowed the thousands of cores in the GPU to unleash their power.
These amazing results were based on a $5,000 graphics card installed on a CFD prep/post machine and used
an Enterprise License, a $7,000 upgrade over a Premium license. On the HPC route, hardware plus software
would cost closer to $100,000.
