[Bhanu Swaroop]

Hi,

I am trying to run a simulation for a centrifugal compressor with co2 (initial pressure of 65 bar and pressure ratio is 2). I am getting the finmes error, the solution is diverging. So I went through the steps mentioned in best practices guide. First I tried to get the initial condition using physical timescale and upwind condition for first order numerics. I tried a iterative process for the timescale from 1e-6 to 1e-9 but still faced the same issue. I tried using local timescale and then change to physical timescale once the solution is steadying but even that failed after a few iterations. The mesh quality is good. The boundary conditions are correct (I ran a similar compressor but for initial pressure of 33.7 bar and pressure ratio 2, the solution converged with the boundary setup). So could anyone help with the issue? (The gas is in vapor phase).