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DTSTAMP:20240214T070242Z
LOCATION:Meeting Room C4.11\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231212T153000
DTEND;TZID=Australia/Melbourne:20231212T154500
UID:siggraphasia_SIGGRAPH Asia 2023_sess121_papers_171@linklings.com
SUMMARY:A Parametric Kinetic Solver for Simulating Boundary-Dominated Turb
 ulent Flow Phenomena
DESCRIPTION:Technical Papers\n\nMengyun Liu and Xiaopei Liu (ShanghaiTech 
 University)\n\nBoundary layer flow plays a very important role in shaping 
 the entire flow feature near and behind obstacles inside fluids. Thus, bou
 ndary treatment methods are crucial for a physically consistent fluid simu
 lation, especially when turbulence occurs at a high Reynolds number, in wh
 ich accurately handling thin boundary layer becomes quite challenging. Tra
 ditional Navier-Stokes solvers usually construct multi-resolution body-fit
 ted meshes to achieve high accuracy, often together with near-wall and sub
 -grid turbulence modeling. However, this could be time-consuming and compu
 tationally intensive even with GPU accelerations. An alternative and much 
 faster approach is to switch to a kinetic solver, such as the lattice Bolt
 zmann model, but boundary treatment has to be done in a cut-cell manner, s
 acrificing accuracy unless grid resolution is much increased. In this pape
 r, we focus on simulating the boundary-dominated turbulent flow phenomena 
 with an efficient kinetic solver. In order to significantly improve the cu
 t-cell-based boundary treatment for higher accuracy without excessively in
 creasing the simulation resolution, we propose a novel parametric boundary
  treatment model, including a semi-Lagrangian scheme at the wall for non-e
 quilibrium distribution functions, together with a purely link-based near-
 wall analytical mesoscopic model by analogy with the macroscopic wall mode
 ling approach, which is yet simple to compute. Such a new method is furthe
 r extended to handle moving boundaries, showing increased accuracy. Compre
 hensive analyses are conducted, with a variety of simulation results that 
 are both qualitatively and quantitatively validated with experiments and r
 eal life scenarios, and compared to existing methods, to indicate superior
 ity of our method. We highlight that our method not only provides a more a
 ccurate way for boundary treatment, but also a valuable tool to control bo
 undary layer behaviors. This has not been achieved and demonstrated before
  in computer graphics, which we believe will be very useful in practical e
 ngineering.\n\nRegistration Category: Full Access\n\nSession Chair: Christ
 opher Batty (University of Waterloo)
URL:https://asia.siggraph.org/2023/full-program?id=papers_171&sess=sess121
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