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NUMERICAL WARNING:: IterSolve: Too many iterations was needed.
at
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FlowSolve: NAVIER-STOKES ITERATION 33
Looking at the solver settings I am not sure what is limiting the NS Iterations to 33. I am running this simulation in Parallel using 4 processes.
Question 1: What setting needs to change to get more Navier-Stokes Iterations (i am not interested in changing the convergence tolerance, preconditions, etc.)?
Question 2: Looking at the solver log it appears that there are 4 different iterations happening (we will look at the last instance). I believe the steady state iteration is 1 because we are not solving a coupled system but I don't necessarily understand what is going on in items 2, 3, and 4.
- 1. A Steady State Iteration = 1
2. An overall Navier-Stokes Iteration = 33
3. A compute change: NS (ITER 65)
4. A compute change: NS (ITER 66)
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FlowSolve:
FlowSolve:
FlowSolve: -------------------------------------
FlowSolve: NAVIER-STOKES ITERATION 33
FlowSolve: -------------------------------------
FlowSolve:
FlowSolve: Starting Assembly...
FlowSolve: Assembly:
: ..........Assembly done
DefUtils::DefaultDirichletBCs: Setting Dirichlet boundary conditions
DefUtils::DefaultDirichletBCs: Dirichlet boundary conditions set
FlowSolve: Dirichlet conditions done
CRS_IncompleteLU: ILU(3) (Real), Starting Factorization:
CRS_IncompleteLU: ILU(3) (Real), NOF nonzeros: 67795903
CRS_IncompleteLU: ILU(3) (Real), filling (%) : 281
CRS_IncompleteLU: ILU(3) (Real), Factorization ready at (s): 1.69
IterSolver: Calling real valued iterative solver
1 0.5071E-07
2 0.2545E-07
.
.
.
500 0.4331E-09
501 0.4331E-09
NUMERICAL WARNING:: IterSolve: Too many iterations was needed.
ComputeChange: NS (ITER=65) (NRM,RELC): ( 0.13897368 0.17096309E-06 ) :: navier-stokes
FlowSolve: iter: 33 Assembly: (s) 10.73 340.00
FlowSolve: iter: 33 Solve: (s) 241.31 8074.57
ComputeChange: NS (ITER=66) (NRM,RELC): ( 0.13897367 0.85481509E-07 ) :: navier-stokes
FlowSolve: Result Norm : 0.13897367194452842
FlowSolve: Relative Change : 8.5481508828119667E-008
ComputeChange: SS (ITER=1) (NRM,RELC): ( 0.13897367 2.0000000 ) :: navier-stokes
Thanks,
MT