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DTSTAMP:20260421T090512Z
LOCATION:Bldg. 6 - Room 103
DTSTART;TZID=Europe/Stockholm:20260629T133000
DTEND;TZID=Europe/Stockholm:20260629T141000
UID:submissions.pasc-conference.org_PASC26_sess108_msaSC108@linklings.com
SUMMARY:Fluid-Structure-Contact Interaction Framework for Simulating Liqui
 d Diaphragm Pumps
DESCRIPTION:Patrick Zulian (UniDistance Suisse, Università della Svizzera 
 italiana); Fabian Wermelinger (HSLU T&A); Gabriele Marchi and Simone Riva 
 (Università della Svizzera italiana); Daniel Ganellari and Christos Kotsal
 os (ETH Zurich / CSCS); and Luca Mangani and Ernesto Casartelli (HSLU T&A)
 \n\nFluid–Structure–Contact Interaction (FSCI) is required to predict flow
 s with large structural deformations, contact events, and rapidly varying 
 pressure fields. Such conditions can produce high-speed jets, free-surface
  breakup, and cavitation, which may cause erosion and reduce device lifeti
 me. Representative applications include high-frequency membrane pumps (e.g
 ., reprography), heart valves and ventricular assist devices, and laborato
 ry analysis components.\n\nWe present a codesigned FSI/FSCI workflow for l
 iquid diaphragm (membrane) pumps based on the Immersed Domain Method, impl
 emented in a fully coupled control-volume finite element method (CVFEM) in
 compressible flow solver with non-matching fluid and structural discretiza
 tions. At each time step, we construct variational coupling operators toge
 ther with valve contact discretizations. The resulting coupled systems are
  solved using either monolithic formulations or staggered strategies combi
 ning shifted-penalty contact treatment with Schur-complement-based solvers
 , and we discuss limitations of segregated approaches commonly used in com
 mercial CFD for strongly coupled transients.\n\nWe report incompressible s
 imulations of a small-scale high-frequency membrane pump in a regime where
  rapid valve closure can trigger cavitation. Predicted cavitation-prone re
 gions are consistent with experimental observations. We also summarize per
 formance results on Grace CPUs and Hopper GPUs (including NVIDIA GH200) an
 d scalability on the CSCS Alps system.\n\nDomain: Engineering, Life Scienc
 es, Computational Methods and Applied Mathematics\n\nSession Chair: Domini
 k Obrist (University of Bern)\n\n
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