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-   -   Incorrect velocity profile (http://www.cfd-online.com/Forums/cfx/119753-incorrect-velocity-profile.html)

MGabr June 24, 2013 10:25

Incorrect velocity profile
 
Dear friends
I am modelling fluid flow through an orifice in Ansys CFX 14 and my inlet pressure is 6000 KPa with mass flow rate 30.907 L/s , i had defined inlet ,outlet, wall boundaries and adjusted my messing with inflation near wall . Although that the velocity profile starts form 1.5 m/s not from zero.
Does anyone has idea about solving this problem
If you need any data to help you in identifying this problem , just let me know

Thanks in advance
best regards

mjgraf June 24, 2013 15:10

the solver is calculating the Q/A at the inflow boundary.

thinking about it another way, elaborate on profile starts at 1.5 m/s and not from zero. do you mean near the wall or the average velocity at the inflow boundary?

ghorrocks June 24, 2013 20:10

If your question is why isn't the velocity at the wall zero - then plot hybrid variables and it will be zero. You are showing the conservative values and these are located slightly off the wall and are therefore not zero.

MGabr June 25, 2013 14:33

Dear mjgraf ; thanks for your reply , i mean the velocity at the wall is 1.5 m/s not zero

MGabr June 25, 2013 14:44

Dear ghorrocks: Thanks for your answer. 10^8 Thanks for you ;) :)


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