Fluent slow down with iteration
 

Hi

As the iteration progresses, the CPU utilization decreases. We need a solution to this.
At the beginning of the calculation (~10,000 iters), it worked so well that there were no gaps in the CPU Utilization graph.

I am currently using ANSYS Fluent 2022R1.
We have enough licenses and we have enough licenses for the number of cores.

The current hardware is good enough for the cases we want to compute. We're not even using half of the RAM we have. (mesh<20,000)

In fact, I had the same symptoms a few years ago, but with a different calculation case. In that case, the problem was solved when the calculation was carried out by switching from GUI to TUI.
However, that is not the case today.

Best regards.

Problem is solved
 

Hi,

The problem has been resolved well.
The cause of the problem may be:
I use both a workstation computer and a personal computer.
Create a mesh on a PC and create a .cas file on fluent.
On the workstation, initialize the created .cas file and then proceed with iteration.
The problem was that the fluent versions of the two computers were different.
To avoid this problem, the version for which the .cas file was created and the version for iteration must be the same. It was confirmed that it does not matter if the mesh version is different.

thanks.