Hi everyone

I'm trying to simulate a laminar two-phase flow problem with solidification! To this end, I tried COMSOL Multiphysics V5.6 and used "Laminar flow" and "Level Set" physics to simulate flow and fluid interfaces respectively, then I added "Heat transfer in fluids" physics with phase change(to solidify one fluid). But I didn't get a good result showing phase change. I uploaded the file here. As you can see in the results(2D plot group6), it seems the software didn't recognized the fluid flow. Did I do mistakes? Or is it even possible to simulate such problem with COMSOL???

Thanks