[lostinicem]

Hello community,
as described in the title I've got some problems with porous media diffuser. I try to describe as good as possible and hope for your help
My problem is to create a fluid flow in a porous diffuser; which fluid is now not really important, so I took nitrogen like in tutorial.
So firstly I created a mesh with ICEM: http://img268.imageshack.us/img268/1076/fluent12.jpg
since I'm new to this whole stuff; I think I invested the right amount of time so it should be ok ..
so after that I imported it to fluent:
1) general: I scale it and click on axis-symmetric
2) models: I choose the viscous laminar
3) materials: nitrogen, so I took all datas from tutorial
4) cell zone conditions: I choose nitrogen and click on porous zone; i take also the same inertial and viscous resistance; so I dont use power law model nor do I change the porosity ( its 1)
5) boundary conditions): inlet: I enter here the fluid velocity, since I can calculate it; outlet: I dont touch anything here
6) solution methods: all I change here is the momentum: its on second order upwind
7) monitors: at residuals I change absolute criteria to 1e-6 ( its bigger than in tutorial, I tried to work with the bigger one, but still no convergence); surface monitors: I choose outlet as surface, I also keep the settings from tutorial
8) so at the last step I initialize and compute from inlet, since the tutorial also says so.

So I tried to change and play with the settings but still no convergence, so my velocity profile looks quiet disappionting; and also since I'm new to this stuff maybe I made a stupid mistake?
Hope someone could help me and sorry for my english