4 ms·
SPH has been fairly common in galaxy simulations over the past 20 years or so. But there's some glaring issues with "classic" SPH formulations, to do with fluid
by privong 10y ago
SPH has been fairly common in galaxy simulations over the past 20 years or so. But there's some glaring issues with "classic" SPH formulations, to do with fluid instabilities. As a result, lots of people are transitioning to moving mesh codes. I put a few links in my other comment (https://news.ycombinator.com/item?id=12461336 https://news.ycombinator.com/item?id=12461336). I'm pretty sure the simulation in the press release is also using a moving mesh for the hydrodynamics.
- lutorm 10y agoNo, this sim is done using GIZMO (a derivative of the GADGET-2 code) which uses a hybrid of SPH and AMR methods: http://www.tapir.caltech.edu/~phopkins/Site/GIZMO.html http://www.tapir.caltech.edu/~phopkins/Site/GIZMO.html
- privong 10y agoGIZMO is the name of the code suite, not the numerical technique. I believe GIZMO contains multiple hydro solvers, including various formulations of SPH, moving mesh, and meshless techniques. But you're right. that the simulation in question wasn't a moving mesh, it was a meshless technique.
- privong 10y ago>> No, this sim is done using GIZMO > GIZMO is the name of the code suite, not the numerical technique. Oops, misread that. You already know it's the code suite, not the technique. :)