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Showing 1 to 20 of 114 for “"FSI"”.
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A patient-specific FSI model for vascular access in haemodialysis
This research forms part of an interdisciplinary project that aims to improve the understanding of haemodynamics and vascular mechanics in arteriovenous shunting. To achieve the high flow rates that enable patients with renal disease to receive haemodialysis, a fistula is created between an artery …
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Coupled Adjoint-based Sensitivity Analysis using a FSI Method in Time Spectral Form
… a CFD/CSD/CA coupling procedure that combines FSI analysis with enforced trim condition. Coupled sensitivity analysis results and their validations are presented and compared with aerodynamics only sensitivity analysis results. The fluid-structure coupled adjoint based sensitivity analysis will …
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FSI Methodology for Analyzing VIV on Subsea Pipeline Free Spans with Practical Boundary Conditions
… three-dimensional fluid-structure interaction (FSI) simulations are performed by coupling the computational fluid dynamics (CFD) codes from STAR-CCM+ with the finite element (FE) codes from ABAQUS. These FSI simulations in combination with separate coupled Eulerian-Lagrangian (CEL) simulations …
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Advancing AFM Nanometrology Through Experimental FSI Quantification, Novel Sensor Design, and Fractional ODE-based Material Models
Nanometrology, which is the study of materials at the nanoscale, has been an important topic for the material science community at large. Atomic Force Microscopy (AFM) has become an indispensable tool to perform nanometrology. Especially, contact resonance (CR) AFM has been used to perform accurate …
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Methods and Implementation of Fluid-Structure Interaction Modeling into an Industry-Accepted Design Tool
<p>Fluid-structure interaction (FSI) modeling is a method by which fluid and solid domains are coupled together to produce a single result that cannot be produced if each physical domain was evaluated individually. The work presented in this dissertation is a demonstration of the methods and …
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Efficient and robust partitioned solution schemes for fluid-structure interactions
… partitioned fluid-structure interactions (FSI) solver is outlined. Well established methods are analysed and new methods are proposed to provide robust, accurate and efficient FSI solutions. All the methods introduced and analysed are primarily geared towards the solution of incompressible, …
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Adaptability of Human Gait: Exploring Red Noise Auditory Stimuli and Gait Fluctuation Patterns
… characterized by a Fractal Scaling Index (FSI), compared to auditory stimuli with FSI values between 1.00 to 1.25. Stepping strategy was analyzed through kinematics including cadence, stride time, and stride velocity, and comparing stride times to stimuli onset times. Fourteen participants …
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Silicon (011) and Silicon Germanium (011) Gas-Source Molecular Beam Epitaxy: Surface Reconstructions, Growth Kinetics, and Germanium Segregation
… in the fraction of H-bonded Si surface atoms, fSi,H. From these data, we find that the Ge segregation enthalpy DeltaHs for Si1--xGex(011) varies from --0.18 eV at Ts = 750°C (fSi,H < 0.003) to --0.09 eV at Ts = 475°C (fSi,H = 0.22).
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Free swimming : impact on physical activity behaviour of a borough-wide population
… and non-users of the FreeSwimming Initiative (FSI) (Study 2; «=529); and semi-structured interviews withmanagement associated with the FSI (Study 3; «=17); and scheme users and non-users (Study4; «=34). Results:Study 1 indicated a positive response to a change in pricing strategy (+15.1% change …
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A Partitioned Approach for Computing Fluid-Structure Interaction, With Application to Tumor Modeling and Simulation
… application: Fluid structure interaction (FSI) and virotherapy on tumor. Moreover, we substantiate a few preliminary results of FSI application on tumor.</p> <p>The FSI problem comprises of fluid forces exerted on the solid body and the motion of the structure affecting the fluid flow. FSI …
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Temporal and Spatial Variation of Fine Sediment Infiltration in a Gravel-Bed River
… can cause extensive fine sediment infiltration (FSI), potentially altering river morphodynamics and aquatic ecosystems. FSI occurs when sand and silt are deposited into void spaces between larger grains at the riverbed. Flume and theoretical modeling provide a background for a conceptual model of …
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Temporal and Spatial Variation of Fine Sediment Infiltration in a Gravel-Bed River
… can cause extensive fine sediment infiltration (FSI), potentially altering river morphodynamics and aquatic ecosystems. FSI occurs when sand and silt are deposited into void spaces between larger grains at the riverbed. Flume and theoretical modeling provide a background for a conceptual model of …
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Numerical Simulation of the Fluid-Structure Interaction of a Surface Effect Ship Bow Seal
… simulations of fluid-structure interaction (FSI) problems were performed in an effort to verify and validate a commercially available FSI tool. This tool uses an iterative partitioned coupling scheme between CD-adapco's STAR-CCM+ finite volume fluid solver and Simulia's Abaqus finite element …
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Effect of Textured Insoles on Gait Variability During Continous Overground Walking in Older Adult Fallers and Non-Fallers
… gait variability and the fractal scaling index (FSI) have been suggested to be sensitive markers of previous falls and predictive of future fall risk in older adults. Gait variability and the FSI of gait require hundreds of strides for valid analysis, which requires specific technology such as …
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Advanced fluid-structure interaction techniques for modeling ringsail parachutes
… in developing fluid-structure interaction (FSI) modeling techniques for several classes of challenging problems including geometrically complex parachutes. Current modeling technologies are expanded upon with emphasis placed on more realistic FSI modeling of the Orion spacecraft ringsail …
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X control charts in the presence of correlation
… quality control charts, fixed sampling interval (FSI) schemes are used where the time between samples has fixed intervals. More efficient methods called variable sampling interval (VSI) schemes have been developed where one takes the next observation sooner than usual if there is an indication …
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Analysis and development of a monolithic computational approach for fluid–structure interaction by means of the finite element method
The phenomenon of fluid–structure interaction (FSI) appears in many engineering applications. Its computation allows to quantify the mechanical behaviour of both fluid and structure interacting with each other. For that purpose, appropriate field equations are specified for an incompressible, …
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Association of Proximal Femoral Geometry with Osteoporotic Proximal Femur Fracture in Elderly Koreans
… femoral fracture, and femur strength index (FSI) was significantly lower in the fracture group. The fracture discrimination improved when HAL and FSI variables were combined with BMD measurements CONCLUSION: Femur geometries such as HAL, FSI can be significant predictors of hip fracture.
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Large Eddy Simulation Based Turbulent Flow-induced Vibration of Fully Developed Pipe Flow
… of a numerical Fluid-Structure Interaction (FSI) model that will help define the relationship between pipe wall vibration and the physical characteristics of turbulent flow. Commercial FSI software packages are based on Reynolds Averaged Navier-Stokes (RANS) fluid models, which do not compute …
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SPH Simulation of Fluid-Structure Interaction Problems with Application to Hovercraft
… to solve complex fluid-structure interaction (FSI) problems. The fluid domain is based on Smoothed Particle Hydro-dynamics (SPH) and the structural domain employs large-deformation Finite Element Method (FEM). Validation tests of SPH and FEM are first performed individually. A loosely-coupled …
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