Reply To: GPU and calculation time
This is unusual. Which is the exact command you use to run the nozzle case? Did you increase the frequency of VTK output compared to the default?
Are gou using single or double precision for the value type?
The low average leads me to believe that there is some issue with the VTK output (e.g. is not performed asynchronously or too often to hide it)
The nozzle case uses a computationally complex turbulent inlet condition s.t. heterogeneous CPU-GPU use can provide an advantage to GPU only.
I assume that you observe this only for the nozzle case and the cavity benchmark behaves as one would expect?