I am trying to run a flow simulation -
As shown below, Ive modeled a very narrow channel with a constriction in the middle (90 degree), but my mesh also meshed the region that is not within the channel, you can see how the center region still is being meshed..
I dont know how to correct this..Ive tried mesh refinement in the region that I need (within the constriction) but it still doesnt seem to work. And -are we supposed to run the 'compute mesh' before running the simulation or not?
Thanks you very much in advance