scholarly journals A fully coupled fluid-structure interaction model of the secondary lymphatic valve

2018 ◽  
Vol 21 (16) ◽  
pp. 813-823 ◽  
Author(s):  
John T. Wilson ◽  
Lowell T. Edgar ◽  
Saurabh Prabhakar ◽  
Marc Horner ◽  
Raoul van Loon ◽  
...  
Keyword(s):  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Lymphatic Valve ◽  
Fully Coupled

Numerical study of rogue wave overtopping with a fully-coupled fluid-structure interaction model

2017 ◽  
Vol 137 ◽  
pp. 48-58 ◽  
Author(s):  
Zhe Hu ◽  
Wenyong Tang ◽  
Hongxiang Xue ◽  
Xiaoying Zhang ◽  
Kunpeng Wang
Keyword(s):  
Rogue Wave ◽  
Numerical Study ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Wave Overtopping ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fully Coupled

A Fully Coupled Fluid-Structure-Interaction Model for Foil Gas Bearings

2012 ◽  
Author(s):  
Wei Zhang ◽  
Abbas A. Alahyari ◽  
Louis Chiappetta
Keyword(s):  
Load Capacity ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Working Fluid ◽  
Performance Parameters ◽  
Fluid Structure ◽  
Gas Bearings ◽  
Structure Interaction ◽  
Gas Bearing ◽  
Fully Coupled

Foil gas bearings are self-acting, compliant-surface hydrodynamic bearings that usually use air or other process gas as their working fluid or lubricant. Foil gas bearings are made of one or more bump foils, which are compliant surfaces of corrugated metal, and one or more layers of top foil. Because foil gas bearing performance parameters, such as load capacity, are dominated by foil material and foil geometric designs, numerical models have been developed to predict the bearing’s performance based on these characteristics. However, previous models often simplify bump foil as elastic foundation with constant stiffness and neglect top foil altogether. Further, they typically use the Reynolds equation to simplify the fluid solution. In this study, ANSYS software is used to build a 3D, fully-coupled, fluid-structure-interaction model for a foil gas bearing to predict key performance parameters such as load capacity and journal attitude angle. The model’s results show good agreement with previously published test data. This not only demonstrates the feasibility of 3D fully coupled fluid-structure-interaction model for a conventional foil bearing using commercial codes, but also shows modeling capability for future generations of foil gas bearing.

A Fully Coupled Fluid–Structure Interaction Model for Foil Gas Bearings

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Wei Zhang ◽  
Abbas A. Alahyari ◽  
Louis Chiappetta
Keyword(s):  
Load Capacity ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Working Fluid ◽  
Performance Parameters ◽  
Fluid Structure ◽  
Gas Bearings ◽  
Structure Interaction ◽  
Gas Bearing ◽  
Fully Coupled

Foil gas bearings are self-acting, compliant-surface hydrodynamic bearings that usually use air or other process gas as their working fluid or lubricant. Foil gas bearings are made of one or more bump foils, which are compliant surfaces of corrugated metal, and one or more layers of top foil. Because foil gas bearing performance parameters, such as load capacity, are dominated by foil material and foil geometric designs, numerical models have been developed to predict the bearing's performance based on these characteristics. However, previous models often simplify bump foil as elastic foundation with constant stiffness and neglect top foil altogether. Further, they typically use the Reynolds equation to simplify the fluid solution. In this study, ansys software is used to build a 3D, fully coupled, fluid–structure interaction (FSI) model for a foil gas bearing to predict the key performance parameters such as load capacity and journal attitude angle. The model's results show good agreement with previously published test data. This not only demonstrates the feasibility of 3D fully coupled fluid–structure interaction model for a conventional foil bearing using commercial codes, but also shows modeling capability for future generations of foil gas bearing.

An Investigation of the Aerodynamic and Vibration Behavior of a Helicopter Rotor Blade

2020 ◽  
Author(s):  
Mohammad Khairul Habib Pulok ◽  
Uttam K. Chakravarty
Keyword(s):  
Rotor Blade ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Scale Model ◽  
Helicopter Rotor ◽  
Small Scale ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Aerodynamic Analysis ◽  
Helicopter Rotor Blade

Abstract Rotary-wing aircrafts are the best-suited option in many cases for its vertical take-off and landing capacity, especially in any congested area, where a fixed-wing aircraft cannot perform. Rotor aerodynamic loading is the major reason behind helicopter vibration, therefore, determining the aerodynamic loadings are important. Coupling among aerodynamics and structural dynamics is involved in rotor blade design where the unsteady aerodynamic analysis is also imperative. In this study, a Bo 105 helicopter rotor blade is considered for computational aerodynamic analysis. A fluid-structure interaction model of the rotor blade with surrounding air is considered where the finite element model of the blade is coupled with the computational fluid dynamics model of the surrounding air. Aerodynamic coefficients, velocity profiles, and pressure profiles are analyzed from the fluid-structure interaction model. The resonance frequencies and mode shapes are also obtained by the computational method. A small-scale model of the rotor blade is manufactured, and experimental analysis of similar contemplation is conducted for the validation of the numerical results. Wind tunnel and vibration testing arrangements are used for the experimental validation of the aerodynamic and vibration characteristics by the small-scale rotor blade. The computational results show that the aerodynamic properties of the rotor blade vary with the change of angle of attack and natural frequency changes with mode number.

scholarly journals Validation and Extension of a Fluid–Structure Interaction Model of the Healthy Aortic Valve

2018 ◽  
Vol 9 (4) ◽  
pp. 739-751 ◽  
Author(s):  
Anna Maria Tango ◽  
Jacob Salmonsmith ◽  
Andrea Ducci ◽  
Gaetano Burriesci
Keyword(s):  
Aortic Valve ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Fluid Structure ◽  
Structure Interaction
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