Nonreflective boundary condition

[sfraniatte]

Hello,

I try to make some aeroacoustic simulations and I need to have nonreflective boundary condition at the inlet and outlet but I do not find it in the document. Does it exist ? If not is it difficult to add it ? I have seen some papers to make but I have not looked into the subject in depth.

Thank you !

[stephan]

Dear sfraniatte,

we are currently working on this.
Similar features should be included in an upcoming release.
It is straight-forward to add a layer of boundary cells, where the relaxation time is increased.
Although this is the least effective approach, it should work well as a first attempt.

If you like to have more information or guided support for your specific implementation, please consider taking part in our next Spring School in May: https://www.openlb.net/spring-school-2025/

BR
Stephan

[sfraniatte]

Hello,

Thank you for your reply (which I’ve only just seen now because I forgot to check the notification option). In the meantime, I started working on implementing such a condition. That said, I feel like the approach you’re talking about complements the one I’ve coded. I’ll start testing my development tomorrow. In any case, I do plan to come to Marseille. Thanks again!

Best regards,

Sylvain

[Author]

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