Welcome! Log In Create A New Profile

Advanced

Non-Reflecting Boundary Conditions (NRBC)

Posted by Eric_XuEric_Xu  
Non-Reflecting Boundary Conditions (NRBC)
February 08, 2018 01:42PM
Hi there,

I am running the showcases of cylinder in 2D flow with the velocity BC around inlet, up and down; and outflow (zero-gradient of all velocity components) BC at the outlet.

As all these boxes are bounce-back, namely, they will reflect the pressure wave all the time, which would bring unsteadiness and collapse the program at high Re.

So I am asking whether there is any method or function to apply non-reflecting boundary condition on the outlet?

Really hope to hear from you. Any information is appreciated.

Cheers,
Eric
Re: Non-Reflecting Boundary Conditions (NRBC)
February 08, 2018 06:52PM
I have a colleague who developed a code for non-reflective boundaries in Palabos for his master thesis. He used the ABC (Absorbing Boundary COndition) by Kam, if I'm not mistaken. You can check his work on his github

[github.com]
Re: Non-Reflecting Boundary Conditions (NRBC)
February 09, 2018 12:04PM
Dear fsantox,

That's really helpful! Thank you very much!

Cheers,
Eric
Sorry, you do not have permission to post/reply in this forum.