Why Unreasonable velocity vector near the wall? Please check the picture included

Shogan · June 15, 2014, 21:51

Guys,

How is your World Cup watching?

Argentina and Bosnia and Herzegovina just play a awesome one!!!!

I run a simulation of helium leakage in a room. However, I found there is unreasonable velocity vector near the wall. Especially the ground and the ceiling.
The velocity vector is normal inward into the wall. This is not right. And I don't know why?
Below is the cross view of the domain. and zoom of the ground area.

Please let me know of you idea. I am stuck here and my boss is pushing me...... Oppessssssss

blackmask · June 15, 2014, 22:01

You should show us the boundary condition settings for ground and ceiling.

Shogan · June 15, 2014, 22:31

Quote:

Originally Posted by blackmask

You should show us the boundary condition settings for ground and ceiling.

Thanks for reminding.
The ground and ceiling are all set as wall. Temperature are all uniform in my simulation 294.14k.

June 15, 2014, 21:51	Why Unreasonable velocity vector near the wall? Please check the picture included	#1
Shogan New Member Shogan Join Date: Jan 2014 Posts: 9 Rep Power: 12	Guys, How is your World Cup watching? Argentina and Bosnia and Herzegovina just play a awesome one!!!! I run a simulation of helium leakage in a room. However, I found there is unreasonable velocity vector near the wall. Especially the ground and the ceiling. The velocity vector is normal inward into the wall. This is not right. And I don't know why? Below is the cross view of the domain. and zoom of the ground area. Please let me know of you idea. I am stuck here and my boss is pushing me...... Oppessssssss

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June 15, 2014, 22:01		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 21	You should show us the boundary condition settings for ground and ceiling.