- What are those iteration records?
- Lat us take a closer look at e.g. time 0.49 s:
Time = 0.49

*Time* means physical time in secondsCourant Number mean: 0.222158 max: 0.852134

*Courant Number mean/max* is mean/maximal CFL number for convergence condition: | (8.2) |

DILUPBiCG: Solving for Ux, Initial residual = 2.09588e-07, Final residual = 2.09588e-07, No Iterations 0

*DILUPBiCG* is linear system solver for U (Diagonal Incomplete LU Decomposition Preconditioned Bi-Conjugate Gradient)- Linear system solver set-up is in file
*fvSolution* - Solver decomposes velocity vector into components and solves them separately
*Initial residual* is the measure of stability of solution with respect to previous iteration.*Final residual* is the residual when linear system solver has finished.*No Iterations* is number of iterations of linear system solverDICPCG: Solving for p, Initial residual = 1.0746e-06, Final residual = 3.53797e-07, No Iterations 1

*DICPCG* is linear system solver used for pressure (Diagonal Incomplete Cholesky Preconditioned Conjugate Gradient)- In PISO algorithm the pressure computation is repeated according to number of correctors
*nCorrectors*time step continuity errors : sum local = 9.1113e-09, global = -6.21295e-19, cumulative = 1.23378e-18

*time step continuity errors* represent certain measures of continuity equation violationExecutionTime = 0.27 s ClockTime = 0 s

*ExecutionTime* is the time elapsed since the start of the computation*ClockTime* is the time spent on processor(s)