Problem with k-epsilon model
 

Hello,
I am trying to create a model of gas injection inside chamber. I created first model with Laminar model. Velocity of air acted as suspected. After changing model into k-epsilon (near-wall treatment - enhanced wall treatment + thermal effects) velocity of air radically changed. Velocity is going down to zero very fast. After that i changed back near wall treatment to standard but it helped only a little bit.

Medium is air, inlet velocity 10m/s. Output is pressure outlet. Both 0 Pa.


Does anyone know how i can fixe my model to get similar velocity distribution in turbulent model?

Sorry if my english is bad. Thank You for help

Here is laminar model:
http://imgbox.com/uayVR7oi

k-epsilon with enhanced wall treatment
http://imgbox.com/xtEWB6G1

k-epsilon
http://imgbox.com/zdGEdpq6

Here is link to my project (in Ansys 14.5)
https://dl.dropboxusercontent.com/u/6374861/13.wbpz

OK i solved the problem. It was density model of air. After coming back to constant everything is normal again.

Does anyone know good density model of air i can use?
Still my heat exchange between air and solid is lame. Flow of air with temperature of 9k°C after 600s is rising temperature of aluminium body for only 100°C (from 300°C).

Does anyone handled similar problem?

How anyone can get some help here? >_<