New Palabos Release (Version 1.3 release 0)

Dear community,

I am glad to announce that the latest release of Palabos is available. It marks, once more, an important milestone with its new comprehensive multi-phase module. You can obtain this release on the usual download page.

Do you remember the free-surface code we launched a year ago (with release 1.1) and with which we simulated for example the dam-break problem? Well, the new multi-phase module is based on the same principles (a volume-of-fluid approach), except that it now fully solves the physics of two phases. To keep the discussion simple, you can imagine that an algorithm similar to the free-surface one is solved separately for each phase, and that a coupling is additionally implemented on the interface to guarantee the continuity of the relevant macroscopic variables. While a first sketch of this model was available already in release 1.2, the current release 1.3 ships with a full framework, examples, and validations.

Let’s look at specific examples to better understand the different features offered by the multi-phase module:

As of this release, we have also decided to discontinue the support for the Python binding of Palabos. While it took huge amounts of work to maintain the binding, its reception has always been biased. Always lagging behind the C++ version with the newest features, the Python binding used to be dropped in favor of C++ even by less experienced programming. By dropping the Python binding, we hope to find additional time to improve the programmer’s interface and documentation of the C++ version.

Another important point of this release is a bug fix in the MPI communication. Palabos used to run into difficulties with certain versions of MPICH (or certain combinations of MPICH and hardware settings). We did our best to fix this issue; any feed-back is appreciated!

To end this message, let me announce (with some delay) that the winner of the Palabos 2012 challenge has been nominated by the jury to be Maciej Matyka. You can find his contribution under the following link. Maciej demonstrates with his work that he has understood the spirit of the challenge, by simply taking Palabos with its current abilities and wrap it up in an interesting application. The visualization and presentation of the results were pointed out to be among the greatest aspects of his contribution. Maciej has won a prize money of 1000 Euros, and we wish him all the best for the future.