It is well-known that classical Dirichlet-Neumann loosely coupled partitioned schemes for fluid-structure interaction (FSI) problems are unconditionally unstable for certain combinations of physical and geometric parameters that are relevant in hemodynamics. It was shown in [18] on a simple test problem, that these instabilities are associated with the so called “added-mass effect”. By consider...

Frequency Scanning Interferometry (FSI) has been developed for high precision, simultaneous, absolute distance measurements along multiple lines of sight. In the ATLAS semiconductor tracker, FSI will be used to measure lines of sight between nodes of a geodetic grid, attached to the support structure. Movements of the detector modules on the order of ten microns will be monitored by measuring c...

INTRODUCTION The compliance of upper airway tissues during respiration could lead to snoring in human subjects and collapse of the airway in patients of obstructive sleep apnea (OSA). The patterns of dynamic wall movement of human upper airway and the causes of OSA are still not fully understood. This study attempts to simulate the movement of human soft palate during respiration using fluid-st...

Calculating high stress concentration within carotid atherosclerotic plaques has been shown to be complementary to anatomical features in assessing vulnerability. Reliability of stress calculation may depend on the constitutive laws/strain energy density functions (SEDFs) used to characterize tissue material properties. Different SEDFs, including neo-Hookean, one-/two-term Ogden, Yeoh, 5-parame...

Recent numerical studies of abdominal aortic aneurysm (AAA) suggest that intraluminal thrombus (ILT) may reduce the stress loading on the aneurysmal wall. Detailed fluid structure interaction (FSI) in the presence and absence of ILT may help predict AAA rupture risk better. Two patients, with varied AAA geometries and ILT structures, were studied and compared in detail. The patient specific 3D ...

This paper presents a fully coupled fluid-structure interaction (FSI) simulation model of soft pneumatic actuator (SPA). Previous research on modelling and SPAs mostly involves finite element (FEM), in which the fluid pressure is considered as load uniformly acting internal walls actuator. However, FEM does not capture physics flow inside an SPA. An accurate physical behaviour SPA requires two-...

Nowadays, advanced composite materials such as carbon fiber reinforced plastics (CFRP) are being applied to many aircraft structures in order to improve performance and reduce weight. Most composites have strong, stiff fibres in a matrix which is weaker and less stiff. However, aircraft wings can break due to Fluid-Structure Interaction (FSI) oscillations or material fatigue. Material inspectio...

Cantilever vibration in fluid environment is probably one of the most common Fluid Structure Interaction (FSI) problems in the field of Micro/Nano Electro Mechanical Systems (MEMS/NEMS). Usually the effect of fluid on cantilever oscillation is characterized in terms of mode resonance frequencies and quality factors (Qs), being those two physical quantities what is actually measured in the dynam...

Full-scale, 3D, time-dependent aerodynamics and fluid–structure interaction (FSI) simulations of a Darrieus-type vertical-axis wind turbine (VAWT) are presented. A structural model of the Windspire VAWT (Windspire energy, http://www.windspireenergy.com/) is developed, which makes use of the recently proposed rotation-free Kirchhoff–Love shell and beam/cable formulations. A moving-domain finite-...

A detailed study of the effect of the η-nucleus final state interaction (FSI) in the p d → He η reaction close to threshold is presented. The FSI is incorporated through a T-matrix for η He elastic scattering, constructed using few body equations. This T-matrix accounts for off-shell and binding effects in η-nucleus scattering. The energy dependence of the data on the p d → He η reaction near t...