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Reply To: Implementing the Cumulant Collision Operator

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› Forums › OpenLB › General Topics › Implementing the Cumulant Collision Operator › Reply To: Implementing the Cumulant Collision Operator

August 19, 2025 at 4:45 pm #10668
jmctighe
Participant

Hi FBukreev,

Thank you for the clarification. I was also wondering about the SuperLatticeTimeAveraged3D and SuperLatticeTimeAveragedCrossCorrelationF3D functors.

For the turbulent channel flow, I would like to perform first and second order statistics on the velocity field data over ~200,000 consecutive time steps with a grid that consists of ~25M voxels. I am using the “gpu_openmpi.mk” configuration with two NVIDIA H100 GPUs.

When I use the time averaged functors, the simulation becomes severely bottlenecked, since the functors are running on the CPU. Are there any work arounds for this? Is it possible to carry out these operations on the GPU using the current framework? Greatly appreciate your help!

-jmctighe