Reply To: Doubt on Scaled Residuals and Time Scale Factor in Fluent

[Rob]

The time scale is a under relaxation function (in simple terms). So a high value will be less stable but will reach the equilibrium result quickly; a low value will be stable but take many iterations to reach the equilibrium result. A sudden drop in any UR value can cause residuals to drop, but that's because the solution change slows, not because it's physically converged. Hence we typically use monitors, fluxes and review images to judge convergence.