Fluid Structure Interaction

Coupling between BEM and SHELL models

 The interaction between thin structures and incompressible Newtonian fluids is ubiquitous both in nature and in industrial applications.

Generalized Immersed Finite Element Methods

The most general model for fluid structure interaction problems based on IFEM is the one developed in Heltai and Costanzo, 2012 (see below for the reference) which allows for materials with general density, general viscosity and which can be either compressible or incompressible.

Adding Thickness to FE-IBM

In the original Immersed Boundary Method, the solid is usually considered thin, or of codimension one. Thickness could be achieved by stacking together several one-dimensional fibers (like in the first movie below). A more general solution, based on Hyper-Elastic theory and standard variational principles was proposed in the reference below.

Finite Element Immersed Boundary Method

A major difficulty associated with the numerical approximation of fluid structure interaction problems is given by the fact that the natural frameworks for dealing with fluids and solids are different: it is customary and convenient to describe fluids in an Eulerian framework, where the unknowns are expressed at fixed points in space, while for solids the natural frame

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