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SUMMARY:MEchanics GAthering -MEGA- Seminar: Simulating fluid-structure int
 eractions with many highly deformable solids
DTSTART:20220428T161500
DTEND:20220428T173000
DTSTAMP:20260407T111356Z
UID:cd1f8aa31d18c20f0511522d0b9fad9eae78e1ea736614339b9b8205
CATEGORIES:Conferences - Seminars
DESCRIPTION:Yuexia Luna Lin (fleXLab\, EPFL)\nAbstract Fluid-structure in
 teractions (FSI) are abundantly observed at all scales\, ranging from micr
 obial locomotion to geological formations. The governing equations are onl
 y analytically trackable in the simplest cases\, making simulations key to
  understanding this important class of problems. Conventional computation
 al methods often create a dilemma for FSI problems. Typically\, solids are
  simulated using Lagrangian meshes that move with the material\, whereas t
 he fluid is simulated using an Eulerian mesh\, i.e. a fixed spatial grid. 
 Thus\, FSI methods often require some type of interfacial coupling betwee
 n the fluid and the solid phases. Generating solid meshes and maintaining 
 their quality often prove challenging\, especially in mid to high Reynolds
  number flows\, or when objects have complex geometries. Detecting contact
  between objects can also become a bottleneck when simulating many-body pr
 oblems. We develop a fully Eulerian FSI method called the reference map t
 echnique (RMT) that addresses these challenges. The method makes use of th
 e reference map fields on a fixed fluid mesh that allow easy switching be
 tween the physical space and the reference space in the solids. We use exa
 mples such as an elastic sphere in a 3D lid-driven flow and settling of ma
 ny particles to demonstrate that the RMT is particularly well suited for s
 imulating FSI with soft\, highly deformable solids\, as well as many-body 
 contact problems.\n\nBio Luna started as a Post-Doc at the flexlab in Nov
 ember 2021. She received her B. A. in physics from Barnard College of Colu
 mbia University\, in 2015. In 2021\, she received her Ph. D. in applied ma
 thematics\, supervised by Prof. Chris Rycroft\, from the Paulson School of
  Engineering and Applied Sciences at Harvard University. During her Ph. D.
  studies\, she modeled and developed numerical methods for a wide range of
  systems\, including fluid-structure interactions between highly deformabl
 e solid structures and incompressible fluid\, and bacterial competitions f
 acilitated by subcellular nanostructures that directly inject toxin to kil
 l neighboring cells. Now at fleXLab\, she is interested in using experime
 ntal approaches to investigate the functions of porous\, elastic\, slender
  structures in locomotion such as flying and swimming. Outside of the lab
 \, Luna enjoys being outdoors\, petting animals\, reading and playing ukul
 ele.
LOCATION:MED 2 2423 https://plan.epfl.ch/?room==MED%202%202423 https://epf
 l.zoom.us/j/64863509346?pwd=RGlkWjRGOVVSaXZxdFdrb3duYy9mZz09
STATUS:CONFIRMED
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