CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   turbulent flows in pipe (http://www.cfd-online.com/Forums/cfx/21550-turbulent-flows-pipe.html)

steven August 24, 2005 16:38

turbulent flows in pipe
 
Thanks in advance for any reply.

I am trying to do turbulence simulation test in a long pipe (say D=0.1m, L=1m). Then I put say 12m/s airflow velocity in inlet. Then I choose k-W model and select 5% turbulence intensity. Other parameters are in default. I have very good quality mesh with highly dense near wall grids. However, the turbulence kinetic energy just disspates very quickly from inlet (like from 1.0 at inlet to 1E-5 at outlet). But I thought I should have increased k along the pipe. Where did I do wrong or any explanations?

Thanks a lot!


All times are GMT -4. The time now is 23:49.