Reference Guide

ANSYS Fluent Performance
16 Dell EMC Ready Solutions for HPC Digital Manufacturing with AMD EPYC™ Processors—ANSYS®
Performance
5 ANSYS Fluent Performance
ANSYS Fluent is a computational fluid dynamics (CFD) application commonly used across a very wide range
of CFD and multi-physics applications. CFD applications typically scale well across multiple processor cores
and servers, have modest memory capacity requirements and typically perform minimal disk I/O while in the
solver section. However, some simulations may have greater I/O demands, such as transient analysis.
Fluent benchmark performance is measured using the Solver Rating metric which is the number of 25
iteration solves that can be completed in a day. That is, (total seconds in a day)/(25 iteration solve time in
seconds). A larger value represents better performance. Figure 6 shows the measured performance for six of
the ANSYS Fluent benchmarks on a single server.
Figure 6 Single Server Relative Performance—ANSYS Fluent
The results presented in Figure 6 are single-server performance results, with the benchmark run using all
processor cores available in the server. The results are plotted relative to the performance of a single server
configured with AMD EPYC 7601 processors. A larger value indicates better performance. These results
show the performance advantage available with AMD EPYC 7002 series processors. The 32-core AMD
EPYC 7452 and 7502 processors provide good performance for these benchmarks. Per server, the 64-core
AMD EPYC 7702 provides a significant performance advantage over the 32-core processors for these
benchmark cases. Note that the relative performance of the AMD EPYC 7702 depends on the specific
benchmark case. This may be due to the larger L3 cache provided by the 7702. The effect of cache can be
significant, and the relative performance may change as more servers are used and more of the data is
contained in cache. Because of this behavior, the relative performance of the various processor models
depends on the specific benchmark case and the number of servers used for the simulation.
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Performance Relative to AMD EPYC 7601
Single Server Relative Performance—ANSYS Fluent 2019R3
AMD EPYC 7601
AMD EPYC 7402
AMD EPYC 7452
AMD EPYC 7502
AMD EPYC 7702