# Incorrect velocity profile

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 June 24, 2013, 10:25 Incorrect velocity profile #1 Member   Mahmoud Gabr Join Date: Aug 2012 Location: Egypt Posts: 30 Rep Power: 4 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

 June 24, 2013, 15:10 #2 Senior Member   Join Date: Dec 2009 Posts: 129 Rep Power: 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?

 June 24, 2013, 20:10 #3 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,820 Rep Power: 85 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.

 June 25, 2013, 14:33 #4 Member   Mahmoud Gabr Join Date: Aug 2012 Location: Egypt Posts: 30 Rep Power: 4 Dear mjgraf ; thanks for your reply , i mean the velocity at the wall is 1.5 m/s not zero

 June 25, 2013, 14:44 #5 Member   Mahmoud Gabr Join Date: Aug 2012 Location: Egypt Posts: 30 Rep Power: 4 Dear ghorrocks: Thanks for your answer. 10^8 Thanks for you

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