Convergence Trick: Gradual Relaxation

Working on a tricky multiphase flow that kept diverging after 500 iterations. Instead of tweaking the mesh again, tried gradually reducing under-relaxation factors:

• Start: Pressure 0.8, Velocity 0.7
• Mid: Pressure 0.5, Velocity 0.5
• Final: Pressure 0.3, Velocity 0.3

Simulation converged beautifully! Sometimes patience beats brute force. The physics doesn't care about our deadlines. 🕐

Pro tip: Monitor residuals AND physical quantities. Residuals can lie, but mass flow rates don't.