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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)

 
 

 

Analysis of a 3D nonlinear, moving boundary problem describing fluid-mesh-shell interaction


Authors: Sunčica Čanić, Marija Galić and Boris Muha
Journal: Trans. Amer. Math. Soc. 373 (2020), 6621-6681
MSC (2010): Primary 74F10, 35D30; Secondary 74K25
DOI: https://doi.org/10.1090/tran/8125
Published electronically: July 8, 2020
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Abstract: We consider a nonlinear, moving boundary, fluid-structure interaction problem between a time-dependent incompressible, viscous fluid flow, and an elastic structure composed of a cylindrical shell supported by a mesh of elastic rods. The fluid flow is modeled by the time-dependent Navier-Stokes equations in a three-dimensional cylindrical domain, while the lateral wall of the cylinder is modeled by the two-dimensional linearly elastic Koiter shell equations coupled to a one-dimensional system of conservation laws defined on a graph domain, describing a mesh of curved rods. The mesh-supported shell allows displacements in all three spatial directions. Two-way coupling based on kinematic and dynamic coupling conditions is assumed between the fluid and composite structure, and between the mesh of curved rods and Koiter shell. Problems of this type arise in many applications, including blood flow through arteries treated with vascular prostheses called stents. We prove the existence of a weak solution to this nonlinear, moving boundary problem by using the time discretization via a Lie operator splitting method combined with an Arbitrary Lagrangian-Eulerian approach, and a nontrivial extension of the Aubin-Lions-Simon compactness result to problems on moving domains.


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Additional Information

Sunčica Čanić
Affiliation: Department of Mathematics, University of California, Berkeley, California 94720
Email: canics@berkeley.edu

Marija Galić
Affiliation: Department of Mathematics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
Email: marijag5@math.hr

Boris Muha
Affiliation: Department of Mathematics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
MR Author ID: 936441
Email: borism@math.hr

DOI: https://doi.org/10.1090/tran/8125
Received by editor(s): August 11, 2019
Received by editor(s) in revised form: February 7, 2020
Published electronically: July 8, 2020
Additional Notes: The first author was supported in part by the U.S. National Science Foundation under grants DMS-1853340 and DMS-1613757. The second and third author were supported in part by the Croatian Science Foundation (Hrvatska zaklada za znanost) grant number IP-2018-01-3706 and by the Croatia-USA bilateral grant “Fluid-elastic structure interaction with the Navier slip boundary condition”.
Article copyright: © Copyright 2020 American Mathematical Society