If you see Level 2, proceed with confidence but verify critical results. If you see Level 3 or 4, stop and remodel. And if you ever see Level 0 for a highly complex assembly—celebrate. You have achieved the holy grail of preconditioning.
The message "The PCG solver has automatically set the level of difficulty for this model to 2" means the software has realized the problem is harder than it looks. It is dynamically adjusting its internal parameters—likely switching to a more robust (but computationally expensive) preconditioner, such as an Incomplete LU (ILU) factorization, to ensure stability. If you see Level 2, proceed with confidence
. This is a mathematical shortcut that helps the computer find the "answer" to your simulation faster without sacrificing the quality of the output. 4. What You Should Do If it runs smoothly: You have achieved the holy grail of preconditioning
Ultimately, the shift to Level 2 reflects the maturity of procedural tools. It demonstrates a system that doesn't just execute commands, but understands the of the challenge it has been asked to solve. to ensure stability.
While PCG traditionally handles symmetric positive-definite matrices, many modern solvers extend it to nearly-symmetric cases. Level 2 often flags small asymmetries from friction or pressure-load following effects.
Higher memory usage; used for models with high aspect ratio elements or material discontinuities. Highly complex