[Maybe you do not know!] It is about "Time step"

phamad

Hi EDEM team and everyone,

I have just realized that the way I select the time step for a simulation has a strong effect on calculation speed.

The case I tested is using the CUDA-based GPU solver with 10 million particles on an RTX A6000 GPU. It is shown that the calculation speed is at least 4 times higher when I use the fixed time step value (I fixed 20%) instead of using "auto time step". And what the GPU Cuda utilization is shown in Task Manager is 60% for the case I used "auto time step", and almost 99% when the fixed time step is used.

I hope this will help

Stephen Cole

Thanks Phamad, that's useful feedback.  I checked with a smaller simulation file but don't see any difference in speed, we'll check with a larger simulation file like yours and review.

 

If it's possible to share the simulation file at t=0 without any particles could you provide this for us?  It maybe something specific to the setup or physics models used.

 

Regards

Stephen