Why does inlet/outlet take a significantly longer time to simulate than piston?
I have recently observed this in my simulations. I was running two irregular wave simulations, one with the piston and the other in inlet/outlet.
The counter-intuitive thing that I observed is that Inlet/Outlet is significantly slower than the piston case even when it has 30% lower number of particles compared to the piston case
Inlet/Outlet: 11.3 million
Piston: 15.97 million
Both have the same particle spacing (dp = 0.01m) and run on the same GPU (NVidia V100)
Here I have plotted the Time\sec from both the simulations. As you can see, the Piston case takes less than half the time to simulate, even with higher particles.
I was of the impression that Inlet/Outlet saves time. But this is contrary to that. Is there something incorrect that I am doing?