HPC Challenge

Contribute · HPC Challenge

The OpenFOAM® HPC Challenge

How fast – and how efficiently – can OpenFOAM® run on today's HPC systems? Join the challenge at OFW22 and compare hardware, software and ideas with the community.

3rd edition Hardware & software tracks Mini-symposium at OFW22
Announce your participation Read the OHC-1 results
About the challenge

Benchmarking OpenFOAM® together

The OpenFOAM HPC Challenge is organised by the OpenFOAM HPC Technical Committee. Participants run the same industrial test case on their own systems and codes, and share time-to-solution, energy use and accuracy in a common format.

The results are discussed in a mini-symposium during the workshop, where hardware vendors, developers and industrial users meet. The full performance data is published afterwards, so the whole community can learn from it.

After the first edition in Vienna (2025) and the second in Guimarães (2026), the challenge continues in Delft.

OHC-1 in numbers
237
valid datapoints
12
contributors
25
CPU models tested
32,768
cores in the largest run
Two ways to compete

Choose your track

Hardware track

Run the fixed reference setup with an official OpenFOAM® release on the hardware of your choice. Show what your CPUs, GPUs, compilers and interconnects can do.

Software track

Use any OpenFOAM®-based code, version or optimisation – from GPU ports to new solvers – while keeping the mesh, physics and accuracy of the reference case.

What is measured

One case, comparable results

Time-to-solution
including pre- and post-processing
Energy-to-solution
the energy needed for one run
Scalability
from a single node to many
Accuracy
compared with the reference solution
Timeline

From test case to Delft

[March 2027]
Test case and reference results released
[April 2027]
Notice of intent to participate
[June 2027]
Data submission deadline
28 June – 2 July 2027
Mini-symposium at OFW22

Ready to take the challenge?

Send a notice of intent to participate. Please note that participants must also register for the workshop.

Announce your participation
This offering is not approved or endorsed by OpenCFD Limited, producer and distributor of the OpenFOAM software via www.openfoam.com, and owner of the OPENFOAM® and OpenCFD® trade marks. OPENFOAM® is a registered trade mark of OpenCFD Limited. Trademark notice
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