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Narrow Band FLIP for Liquid Simulations

Florian Ferstl, Ryoichi Ando, Chris Wojtan, Rüdiger Westermann, Nils Thuerey
2016 Computer graphics forum (Print)  
We present a method that only uses FLIP particles within a narrow band of the liquid surface, while efficiently representing the remaining inner volume on a regular grid.  ...  Abstract The Fluid Implicit Particle method (FLIP) for liquid simulations uses particles to reduce numerical dissipation and provide important visual cues for events like complex splashes and small-scale  ...  Hence, we refer to our method as narrow band FLIP (NB-FLIP). Our narrow band method consists of three main components: 1. The coupling of grid simulation and FLIP simulation. 2.  ... 
doi:10.1111/cgf.12825 fatcat:qs3e2oax7nasdkm6atlbcn37ee

Ships, Splashes, and Waves on a Vast Ocean [article]

Libo Huang, Ziyin Qu, Xun Tan, Xinxin Zhang, Dominik L. Michels, Chenfanfu Jiang
2021 arXiv   pre-print
Such simulations can be carried out using the Fluid-Implicit-Particle (FLIP) method.  ...  Simulating water splashes near moving objects, which height field methods for water waves cannot capture, necessitates high resolutions.  ...  We thank Da Fang and Christopher Batty for releasing their source code and Miguelangelo Rosario for providing the ship model.  ... 
arXiv:2108.05481v3 fatcat:yapojlceabcb5ihxpm7fmoqk7e

Orbital-selective Mott transitions in the 2-bandJz-model: a high-precision quantum Monte Carlo study

P. G. J. van Dongen, C. Knecht, N. Blümer
2006 Physica status solidi. B, Basic research  
orbital-selective Mott transitions (OSMTs) even in the absence of spin-flip terms and pair-hopping processes.  ...  This paper extends our previous work to lower temperatures. We discuss the nature - in particular the order - of both Mott transitions and list various possible extensions.  ...  Ueda for stimulating discussions and acknowledge support by the NIC Jülich and by the DFG (Forschergruppe 559, Bl775/1).  ... 
doi:10.1002/pssb.200562449 fatcat:bcvwtb324bc3fclkn5x2g3keyi

Liquid Splash Modeling with Neural Networks [article]

Kiwon Um, Xiangyu Hu, Nils Thuerey
2018 arXiv   pre-print
This paper proposes a new data-driven approach to model detailed splashes for liquid simulations with neural networks.  ...  For the velocity modification, we employ a heteroscedastic model. We evaluate our method for different spatial scales, simulation setups, and solvers.  ...  While FLIP has become a practical solution for liquid simulations, the core method has been extended to various ways in order to improve its simulation quality and efficiency.  ... 
arXiv:1704.04456v2 fatcat:qzsah4z57jadvavhwsz62bn5mq

A stream function solver for liquid simulations

Ryoichi Ando, Nils Thuerey, Chris Wojtan
2015 ACM Transactions on Graphics  
We implemented this method using a variant of FLIP simulation which only samples particles within a narrow band of the liquid surface, and we illustrate the effectiveness of our method for detailed two-phase  ...  Previous methods have used stream function techniques for the simulation of detailed single-phase flows, but a formulation for liquid simulation has proved elusive in part due to the free surface boundary  ...  Additionally, we want to thank Reiji Tsuruno for providing us with computational resources, Keenan Crane for discussions about the Hodge decomposition, Florian Ferstl for discussions about FLIP, and the  ... 
doi:10.1145/2766935 fatcat:xy36rdwobfc27hewghx73rhdsa

Neural UpFlow: A Scene Flow Learning Approach to Increase the Apparent Resolution of Particle-Based Liquids [article]

Bruno Roy, Pierre Poulin, Eric Paquette
2021 arXiv   pre-print
We also propose a particle-based approach to interpolate between liquids generated from varying simulation discretizations using a state-of-the-art bidirectional optical flow solver method for fluids in  ...  We present a novel up-resing technique for generating high-resolution liquids based on scene flow estimation using deep neural networks.  ...  Finally, We would like to thank Autodesk, Inc. for providing resources to carry out this project in the end.  ... 
arXiv:2106.05143v1 fatcat:yzb76xpbrrbstnyi6c7nwqnvby

The Human Skin Barrier Is Organized as Stacked Bilayers of Fully Extended Ceramides with Cholesterol Molecules Associated with the Ceramide Sphingoid Moiety

Ichiro Iwai, HongMei Han, Lianne den Hollander, Stina Svensson, Lars-Göran Öfverstedt, Jamshed Anwar, Jonathan Brewer, Maria Bloksgaard, Aurelie Laloeuf, Daniel Nosek, Sergej Masich, Luis A. Bagatolli (+2 others)
2012 Journal of Investigative Dermatology  
The lipids are organized in an arrangement not previously described in a biological system-stacked bilayers of fully extended ceramides (CERs) with cholesterol molecules associated with the CER sphingoid  ...  matrix in situ, in its near-native state, using a methodological approach combining very high magnification cryoelectron microscopy (EM) of vitreous skin section defocus series, molecular modeling, and EM simulation  ...  ACKNOWLEDGMENTS We thank Bertil Daneholt for unwavering support and encouragement for more than a decade.  ... 
doi:10.1038/jid.2012.43 pmid:22534876 fatcat:fuyflhzjuzesvo4ys6owxuy4ju

Infrared probe of the electronic structure and carrier scattering in NiMnSb thin films

F. B. Mancoff, B. M. Clemens, E. J. Singley, D. N. Basov
1999 Physical Review B (Condensed Matter)  
The contribution of the interband transitions to the optical conductivity, as well as the spectral weight of conducting carriers, agree with the band structure calculations predicting a half-metallic state  ...  The simulated 1/͑͒, though, shows a slight positive slope for low , since the pseudogap used for N ↓ () gives Pϭ50%, which allows limited spin-flip scattering even below ⌬.  ...  Except for the lowest frequencies, the absolute value of the scattering rate is smaller than , which is in accord with the Fermi-liquid theory.  ... 
doi:10.1103/physrevb.60.r12565 fatcat:a35j3yilkrgwnglbg6322vc7re

MultiFLIP for energetic two-phase fluid simulation

Landon Boyd, Robert Bridson
2012 ACM Transactions on Graphics  
The Fluid Implicit Particle (FLIP) method, already shown to effectively simulate incompressible fluids with low numerical dissipation, is extended to two-phase flow by associating a phase bit with each  ...  Fig. 1 : The "glugging" effect of water pouring through a spout cannot be reproduced with single-phase liquid simulation.  ...  We are grateful to Christopher Batty, Tyson Brochu and Essex Edwards for helpful discussions and suggestions.  ... 
doi:10.1145/2159516.2159522 fatcat:gzyu5bsoingutb7k2ho2b6vczm

Hyperpolarized Nanodiamond Surfaces [article]

Ewa Rej, Torsten Gaebel, David E.J. Waddington, David J. Reilly
2016 arXiv   pre-print
Here, we extend this functionality to the domain of magnetic resonance, by demonstrating that the intrinsic electron spins on the nanodiamond surface can be used to hyperpolarize adsorbed liquid compounds  ...  The widespread use of nanodiamond as a biomedical platform for drug-delivery, imaging, and sub-cellular tracking applications stems from their non-toxicity and unique quantum mechanical properties.  ...  Boele for useful discussions. For SEM measurements the authors acknowl- EQuS CE110001013) and ARC DP1094439.  ... 
arXiv:1606.06822v1 fatcat:hc4chcjixvfxlpnsgklku3uve4

A spin-liquid with pinch-line singularities on the pyrochlore lattice

Owen Benton, L.D.C. Jaubert, Han Yan, Nic Shannon
2016 Nature Communications  
Here we report the discovery of a spin liquid where the low-temperature physics is naturally described by the fluctuations of a tensor field with a continuous gauge freedom.  ...  At the same time, the data presented in Ref. 11, shows bright, narrow features extending along the 111 directions.  ...  However, in this case the experimental scattering shows pronounced butterfly-like features in the non spin-flip (NSF) channel and the scattering in the spin-flip (SF) channel shows narrow armlike features  ... 
doi:10.1038/ncomms11572 pmid:27225400 pmcid:PMC4894955 fatcat:h3igoknrpvfdllhrwa4xcw3e6e

Perceptual evaluation of liquid simulation methods

Kiwon Um, Xiangyu Hu, Nils Thuerey
2017 ACM Transactions on Graphics  
We introduce this approach for computing scores of simulation methods as visual accuracy metric. As an application of the proposed framework, a variety of popular simulation methods are evaluated.  ...  The key idea for a robust and reliable evaluation is to use a reference video from a carefully selected real-world setup in the user study.  ...  ACKNOWLEDGMENTS We would like to thank all members of the graphics labs of TUM and IST Austria for the thorough discussions and the SPHERIC community for providing the experimental videos.  ... 
doi:10.1145/3072959.3073633 fatcat:qq6tvp7zvnaonh5lryzy3woqga

Water clusters: Untangling the mysteries of the liquid, one molecule at a time

F. N. Keutsch, R. J. Saykally
2001 Proceedings of the National Academy of Sciences of the United States of America  
Extensive terahertz laser vibration-rotation-tunneling spectra and mid-IR laser spectra have been compiled for several isotopomers of small (dimer through hexamer) water clusters.  ...  This new information permits us to systematically untangle the intricacies associated with cooperative hydrogen bonding and promises to lead to a more complete molecular description of the liquid and solid  ...  T he quest to achieve an accurate description of liquid water has produced major advances in the last two decades (1), yet despite the construction of hundreds of model force fields for use in simulations  ... 
doi:10.1073/pnas.191266498 pmid:11535820 pmcid:PMC58500 fatcat:nyxy3g3u25gdffh6xff4mmgxu4

Programmable Supercontinuum Laser Spectrum Generator Based on a Liquid-Crystal on Silicon Spatial Light Modulator

Pascuala García-Martínez, Ignacio Moreno, María del Mar Sánchez-López, Jordi Gomis, Pedro Martínez, Aarón Cofré
2021 Frontiers in Physics  
This new ability for controlling at will the wide spectra of the SC laser sources can be extremely useful for biological imaging applications.  ...  In this work we present an optical system to spectrally filter a SC laser source using liquid-crystal on silicon (LCoS) spatial light modulators (SLM).  ...  Some efforts have been done in solar simulators using a supercontinuum laser to implement tuning spectra using static opaque masks as mobile elements for spectral shaping [7] or use a programmable liquid  ... 
doi:10.3389/fphy.2021.651147 fatcat:sqxiq46gszdgvkv72tmq6lax6y

Visual Simulation of Multiple Fluids in Computer Graphics: A State-of-the-Art Report

Bo Ren, Xu-Yun Yang, Ming C. Lin, Nils Thuerey, Matthias Teschner, Chenfeng Li
2018 Journal of Computer Science and Technology  
Narrow-band surfaces near the actual interface is first constructed, then the exact interface is marked from the Voronoi interface of these surfaces.  ...  It is extended in [YJL * 16] to provide unified simulation containing both liquid and solid phases.  ... 
doi:10.1007/s11390-018-1829-0 fatcat:4r525tzzwvgqhguiy76mabha2a
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