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TZID:Asia/Hong_Kong
X-LIC-LOCATION:Asia/Hong_Kong
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TZOFFSETFROM:+0800
TZOFFSETTO:+0800
TZNAME:HKT
DTSTART:19911015T033000
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BEGIN:VEVENT
DTSTAMP:20251218T030655Z
LOCATION:Meeting Room S221\, Level 2
DTSTART;TZID=Asia/Hong_Kong:20251218T092100
DTEND;TZID=Asia/Hong_Kong:20251218T093200
UID:siggraphasia_SIGGRAPH Asia 2025_sess149_papers_1701@linklings.com
SUMMARY:Implicit Incompressible Porous Flow using SPH
DESCRIPTION:Timna Böttcher, Lukas Westhofen, Stefan Rhys Jeske, and Jan Be
 nder (RWTH Aachen University)\n\nWe present a novel implicit porous flow s
 olver using SPH, which maintains fluid incompressibility and is able to mo
 del a wide range of scenarios, driven by strongly coupled solid-fluid inte
 raction forces. Many previous SPH porous flow methods reduce particle volu
 mes as they transition across the solid-fluid interface, resulting in sign
 ificant stability issues. We instead allow fluid and solid to overlap by d
 eriving a new density estimation. This further allows us to extend SPH pre
 ssure solvers to take local porosity into account and results in strict en
 forcement of incompressibility. As a result, we can simulate porous flow u
 sing physically consistent pressure forces between fluid and solid. In con
 trast to previous SPH porous flow methods, which use explicit forces for i
 nternal fluid flow, we employ implicit non-pressure forces. These we solve
  as a linear system and strongly couple with fluid viscosity and solid ela
 sticity. We capture the most common effects observed in porous flow, namel
 y drag, buoyancy and capillary action due to adhesion. To achieve elastic 
 behavior change based on local fluid saturation, such as bloating or softe
 ning, we propose an extension to the elasticity model. We demonstrate the 
 efficacy of our model with various simulations that showcase the different
  aspects of porous flow behavior. To summarize, our system of strongly cou
 pled non-pressure forces and enforced incompressibility across overlapping
  phases allows us to naturally model and stably simulate complex porous in
 teractions.\n\nRegistration Category: Full Access, Full Access Supporter\n
 \nSession Chair: Bo Ren (TMCC, College of Computer Science, Nankai Univers
 ity)\n\n
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