Greetings,nIn the physical reactor flow is steady and I do not expect the flow field to change with time once system is in equilibrium.nSir what do you mean by why does a low UR help in this case, what flow feature are you trying to avoid, and how is this linked to using a turbulence model?.nBefore posting my problem here I tried to read a lot of articles online but I did not get any answer to my problem.nCould you please share an article or a link that can elaborate this. nLooking forward to your great assistance and invaluable support n guidance.Regardsnn