E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh · HackerPapers discussions

E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh — mentioned by vanderZwan

Mon, 22 Oct 2018 11:19:38 GMT

Well, conceptually maybe, but I have some doubts regarding: > 2) Compute Delaunay in 3D How much slower is 3D triangulation compared to 2D? How does it scale with more points? And just as importantly: how complex does the algorithm get when we want to improve performance? I'm not saying you're wrong - if anything I hope I'm wrong, but I suspect the answers to my questions are "significant", "badly", and "very", which would mean this is not easier/more robust in practice (or it comes at the price of being unacceptably slow). The reason I think so is Julia's Voronoi/Delaunay package[0]. It…

Paper and discussion history. A mention is not an endorsement.

E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh — mentioned by privong

Fri, 09 Sep 2016 11:58:34 GMT

> Can somebody who knows about this tell me how much of the novelty in this is CS and how much physics? It's a little bit of both. Over the past 5–8 years, some new numerical techniques ("moving mesh") have been developed (or at least first applied in astronomy) for hydrodynamic simulations[0,1]. These new techniques do a much better job of handling fluid instabilities, which can be important for properly simulating the gas in galaxies (which can have a huge range in densities and temperatures). Also, people have developed what they call "cosmological zoom" simulations. In these simulations…

Paper and discussion history. A mention is not an endorsement.