I currently have a model that I am running. After running about an hour, the total estimated time to complete was down to around 36 hours with a time step of around 3 seconds. I left it overnight and the estimated time went up to 77 hours with a timestep of 1 second or less.
Background for my model: I am running temperature and water quality with withdraw/return, hydraulic boundaries, and flow conditions.
I am only running one model at the moment. I am using 11 out of 12 available cores.
Is this normal or is there something wrong with my setup.