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Out Of Mind » VOICES CARRY ~ QUESTION EVERYTHING » Aug Tellez » Schrödinger’s Smoke (SIGGRAPH 2016)

Schrödinger’s Smoke (SIGGRAPH 2016)

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1 Schrödinger’s Smoke (SIGGRAPH 2016) on Thu May 24, 2018 8:45 pm

PurpleSkyz

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Schrödinger’s Smoke (SIGGRAPH 2016)

 omnipulse   May 24, 2018



What does this tell you about the universe?



https://youtu.be/5C9BLAXCe1I


Albert Chern
Published on Apr 22, 2016


We describe a new approach for the purely Eulerian simulation of incompressible fluids. In it, the fluid state is represented by a ℂ²-valued wave function evolving under the Schrödinger equation subject to incompressibility constraints. The underlying dynamical system is Hamiltonian and governed by the kinetic energy of the fluid together with an energy of Landau-Lifshitz type. The latter ensures that dynamics due to thin vortical structures, all important for visual simulation, are faithfully reproduced. This enables robust simulation of intricate phenomena such as vortical wakes and interacting vortex filaments, even on modestly sized grids. Our implementation uses a simple splitting method for time integration, employing the FFT for Schrödinger evolution as well as constraint projection. Using a standard penalty method we also allow arbitrary obstacles. The resulting algorithm is simple, unconditionally stable, and efficient. In particular it does not require any Lagrangian techniques for advection or to counteract the loss of vorticity. We demonstrate its use in a variety of scenarios, compare it with experiments, and evaluate it against benchmark tests. A full implementation is included in the ancillary materials. This is a work by Albert Chern, Felix Knöppel, Ulrich Pinkall, Peter Schröder, and Steffen Weißmann. Paper (38MB): http://multires.caltech.edu/pubs/Schr... Code (1.5MB): http://multires.caltech.edu/pubs/Schr... Project page: http://www.its.caltech.edu/~achern/pr...


Thanks to: https://augtellez.wordpress.com



  

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