Not immediatly convergent
 

my simulation is about a ducting of two air conditioner in train. there are some room partition in a car, then I'm using edges sizing in mesh, using k epsilon realizable for viscos model, but my iteration show this, it s not being convergent, URF have been change into 0.3 (momentum) inlet using velocity inlet and outlet using pressuure outlet. what happen to this? what can I do to fix this?