Today we are glad to announce that Enhancing active wave absorption in RANS models has just been published at Applied Ocean Research.

You can access the paper for free during the first 50 days using the following link:

https://authors.elsevier.com/a/1a7UkW5Z38f%7EE

Enhancing active wave absorption in RANS models

In this work we review the most common methods for absorbing waves in Reynolds-Averaged Navier-Stokes (RANS) models. The limitations of active wave absorption, originating from its initial assumption of linear wave theory in shallow waters are overcome and the range of applicability is extended to any relative water depth conditions by re-deriving the formulation. The new Extended Range Active Wave Absorption (ER-AWA) overperforms the traditional implementation in all the tests performed, which comprise solitary waves, regular waves and irregular sea states from shallow to deep waters. Moreover, the combined use of a relaxation zone and ER-AWA is tested to further reduce wave reflections. This is most often achieved for a given set of parameters, although some case by case tuning of the relaxation zone parameters would be needed to obtain the best overall performance.

Using the new ER-AWA absorption model

The new implementation for ER-AWA will is already available at olaFlow’s GitHub site.

You can access all the information on how to download the code and use the new boundary condition at this post.