aphros

Project author here. The gallery is part of scientific software Aphros https://github.com/cselab/aphros for flow simulations. Examples in the gallery demonstrate what physical problems can be solved. The same configuration can be used on larger computers (including supercomputers). Intended for potential users of the software and those willing to learn some fluid mechanics. Here's a post by the other author of the project https://news.ycombinator.com/item?id=26492582

Thank you for the feedback. The restart button is added. The documentation is here https://cselab.github.io/aphros/wasm/aphros_doc.html. In two dimensions 'sphere CX CY 0 RX RY' is an ellipsoid with a centre and two radii, the configuration files are the same as in three dimensions, so there are some glitches with naming. We also have a wiki gallery of examples https://github.com/cselab/aphros/wiki/Aphros-Explorer

This simulation is called a "Foaming waterfall". The waterfall captures air bubbles that rise to the surface and create foam. Similar effects are observed in oceans covered with foam generated by breaking waves. Our paper [3] describes the algorithm and contains more applications of this software stack. An online widget [4] shows the algorithm in two dimensions. [1] https://www.youtube.com/watch?v=0Cj8pPYNJGY [2] https://github.com/cselab/aphros [3] https://arxiv.org/abs/2103.01513 [4] https://cselab.github.io/aphros/wasm/hydro.html

We did a simulation of foam on water [1] using the open-source solver Aphros [2] and visualized using ParaView with the Intel OSPRay backend for path tracing. It took 20 hours on 14000 cores of the Piz Daint supercomputer. [1] https://www.youtube.com/watch?v=0Cj8pPYNJGY [2] https://github.com/cselab/aphros

The application itself is easy to parallelize. And the production version does run in parallel (https://github.com/cselab/aphros) but relies on OpenMP and MPI. My first attempt to get C++11 threads running through WASM was not successful. Apparently, this feature is also disabled by default in some browsers because of the Spectre vulnerability.