convergence of DPM simulations

fluid

Hello, I'm quite unfamiliar with DPM simulations so I have some doubt about convergence criteria and residuals profile in these cases.... Anyone knows what kind of convergence can be expected "as normal" during a DPM steady simulation with unsteady or stochastic tracking? I mean: is it normal to have a quite scattered profile of residuals and physical quantity involved (mass balance, heat transfer, etc.)? If residuals are averagely low but not so "smooth" can I consider it as not alarming or there's something to check further? Thank you guys! fluid