error message on setup cfx

ABUMOAYAD · November 3, 2017, 09:38

I’m simulating annular tank filled 60% of water with horizontal excitation but always when I finished from setup get tow error below:
1- In Analysis 'Flow Analysis 1' - Domain 'Default Domain': Mesh motion is specified on the boundary 'opening'. This is valid for motion that is tangential to the boundary but solution errors will occur if motion is normal to the boundary.
2- In Analysis 'Flow Analysis 1': Export results are unavailable as no suitable boundaries exist for use as export surfaces. Mesh motion on a boundary invalidates its use as an export surface.
Any help will be greatly appreciated!
Thanks
hamid

ghorrocks · November 3, 2017, 23:05

It is a warning, not an error. It is not stopping you proceeding.

And if you read the warning you will see that it says tangential motion of the opening is OK. It looks like your opening is horizontal and you said you are doing horizontal excitation - so this is tangential motion so you will be fine to proceed.

ABUMOAYAD · November 9, 2017, 08:28

Thank you very much for your reply

evcelica · November 9, 2017, 12:43

For my own curiosity, What is the purpose of the opening anyways? Why not just a wall? does this make the pressure more numerically stable?

November 3, 2017, 23:05		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	It is a warning, not an error. It is not stopping you proceeding. And if you read the warning you will see that it says tangential motion of the opening is OK. It looks like your opening is horizontal and you said you are doing horizontal excitation - so this is tangential motion so you will be fine to proceed. ABUMOAYAD likes this.

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November 9, 2017, 08:28		#3
ABUMOAYAD New Member Hamid Arakey Join Date: Nov 2017 Posts: 2 Rep Power: 0	Thank you very much for your reply

November 9, 2017, 12:43		#4
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	For my own curiosity, What is the purpose of the opening anyways? Why not just a wall? does this make the pressure more numerically stable?