Stress free boundary condition

Ari · September 22, 2015, 18:46

Hi everyone, does anyone know what is a "stress free" boundary condition? and how do you set that in fluent? I'm going to simulate the blood flow in a model of thoracic aorta. I've read some papers in which they talk about this stress free outflow BC to impose at the outlet. I've searched around but could't figure out what stress free boundary condition exactly is and how to impose it on fluent.
Any help would be really appreciated! thanks!

LuckyTran · September 22, 2015, 23:35

The outflow boundary condition in Fluent does have zero streamwise gradients. But I haven't yet heard of a "stress free" boundary condition so it would be nice to have a concise definition.

September 22, 2015, 18:46	Stress free boundary condition	#1
Ari New Member Arianna Join Date: Sep 2015 Posts: 9 Rep Power: 12	Hi everyone, does anyone know what is a "stress free" boundary condition? and how do you set that in fluent? I'm going to simulate the blood flow in a model of thoracic aorta. I've read some papers in which they talk about this stress free outflow BC to impose at the outlet. I've searched around but could't figure out what stress free boundary condition exactly is and how to impose it on fluent. Any help would be really appreciated! thanks!

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September 22, 2015, 23:35		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,845 Rep Power: 68	The outflow boundary condition in Fluent does have zero streamwise gradients. But I haven't yet heard of a "stress free" boundary condition so it would be nice to have a concise definition.