Experimental Study of Channel Driven Cavity Flow for Fluid–Structure Interaction

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Y. W. Kwon ◽  
S. M. Arceneaux
Keyword(s):  
Fluid Velocity ◽  
Fluid Structure Interaction ◽  
Fluid Motion ◽  
Cavity Flow ◽  
Dynamic Responses ◽  
Fluid Structure ◽  
Driven Cavity ◽  
Structure Interaction ◽  
Displacement Sensors ◽  
Driven Cavity Flow

An experimental setup was designed and fabricated for the channel driven cavity flow in order to provide benchmark data for validation of any numerical analysis program for solving fluid–structure interaction (FSI) problems. The channel driven cavity flow is a modification from the lid-driven cavity flow. To provide the fluid–structure interaction, the bottom face of the cavity is a deformable flat plate. All other boundaries are rigid. The fluid motion inside the cavity is driven by the flow through a narrow channel topside of the cavity. To establish suitable boundary conditions for numerical analyses of the experiment, the inlet of the channel has a given fluid velocity, while its outlet has a known pressure. Water is used as the fluid in this study. Multiple strain gages and laser displacement sensors were used to measure dynamic responses of the plate attached at the bottom of the cavity.

scholarly journals Fluid–Structure Interaction and Flow Redistribution in Membrane-Bounded Channels

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4259 ◽  
Author(s):  
Giuseppe Battaglia ◽  
Luigi Gurreri ◽  
Andrea Cipollina ◽  
Antonina Pirrotta ◽  
Svetlozar Velizarov ◽  
...  
Keyword(s):  
Fluid Velocity ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Flow Distribution ◽  
Transmembrane Pressure ◽  
Hydraulic Permeability ◽  
Fluid Structure ◽  
Membrane Deformation ◽  
Structure Interaction ◽  
Adjacent Channels

The hydrodynamics of electrodialysis and reverse electrodialysis is commonly studied by neglecting membrane deformation caused by transmembrane pressure (TMP). However, large frictional pressure drops and differences in fluid velocity or physical properties in adjacent channels may lead to significant TMP values. In previous works, we conducted one-way coupled structural-CFD simulations at the scale of one periodic unit of a profiled membrane/channel assembly and computed its deformation and frictional characteristics as functions of TMP. In this work, a novel fluid–structure interaction model is presented, which predicts, at the channel pair scale, the changes in flow distribution associated with membrane deformations. The continuity and Darcy equations are solved in two adjacent channels by treating them as porous media and using the previous CFD results to express their hydraulic permeability as a function of the local TMP. Results are presented for square stacks of 0.6-m sides in cross and counter flow at superficial velocities of 1 to 10 cm/s. At low velocities, the corresponding low TMP does not significantly affect the flow distribution. As the velocity increases, the larger membrane deformation causes significant fluid redistribution. In the cross flow, the departure of the local superficial velocity from a mean value of 10 cm/s ranges between −27% and +39%.

Hydroelastic Modeling of a Compliant Offshore Tower: Formulation

2003 ◽  
Author(s):  
Jinzhu Xia ◽  
Quanming Miao ◽  
Nicholas Haritos ◽  
Beverley Ronalds
Keyword(s):  
Oil And Gas ◽  
Equations Of Motion ◽  
Fluid Structure Interaction ◽  
Coupled System ◽  
Dynamic Responses ◽  
Variation Principle ◽  
Diffraction Radiation ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Radiation Theory

Offshore oil and gas can be produced using a variety of platform types. One option, the compliant offshore tower, has proven to be an economic solution in moderately deep water (300–600m). In this paper, the wave-induced global dynamic responses of a compliant tower in wind, current and waves are studied in the context of fluid-structure interaction. A beam undergoing transverse and axial motion models the vertical member of the tower. The beam is supported by a linear-elastic torsional spring at the bottom end and a point mass and a buoyant chamber is located at the top free end. The fluid forces on the beam are modeled using the Morison equation while the hydrodynamic forces on the chamber are obtained based on the three-dimensional diffraction-radiation theory. By applying Hamilton’s variation principle, the equations of motion are derived for the coupled fluid-structure interaction system. The non-linear coupled system equations that emanate from this new approach can then be solved numerically in the time domain.

ON A FLUID-STRUCTURE INTERACTION PROBLEM IN VELOCITY-DISPLACEMENT FORMULATION

1998 ◽  
Vol 08 (04) ◽  
pp. 543-572 ◽  
Author(s):  
F. FLORI ◽  
P. ORENGA
Keyword(s):  
Weak Solutions ◽  
Velocity Structure ◽  
Fluid Velocity ◽  
Fluid Structure Interaction ◽  
Neumann Condition ◽  
Coupling Condition ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Regularity Results ◽  
Interaction Problem

We present in this paper an existence result of weak solutions as well as some regularity results for a fluid-structure interaction problem when a fluid velocity-structure displacement formulation is used. This formulation induces a difficulty connected with the coupling condition. Indeed, unlike the pressure-displacement formulation, we do not have a Neumann condition and consequently it is more difficult to obtain weak solutions.

The Dynamic Response of Gravity Type Quay Wall During Earthquake Including Soil-Sea-Structure Interaction

2006 ◽  
Author(s):  
A. R. M. Gharabaghi ◽  
A. Arablouei ◽  
A. Ghalandarzadeh ◽  
K. Abedi
Keyword(s):  
Dynamic Response ◽  
Direct Method ◽  
Fluid Velocity ◽  
Fluid Structure Interaction ◽  
Interaction Effects ◽  
Material Behavior ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Media Formulation ◽  
Quay Wall

The dynamic response of gravity type quay wall during earthquake including soil-sea-structure interaction is calculated using ADINA finite element techniques. The main objective of this study is to investigate the effects of fluid-structure interaction on the residual displacement of wall after a real earthquake. A direct symmetric coupled formulation based on the fluid velocity potential is used to calculate the nonlinear hydrodynamic pressure of sea water acting on the wall. The doubly asymptotic approximation (DAA) is used to account for the effects of outer fluid on the inner region. The non-associated Mohr-Coulomb material behavior is applied to model the failure of soil. The full nonlinear effective stress analysis is performed in this study and the soil-pore fluid interaction effects are modeled using porous media formulation. Viscous boundary condition is implemented to model the artificial boundary in direct method analysis of soil-structure interaction system and sliding contact condition was modeled in the interface of wall and surrounding soil. A typical configuration of gravity quay wall is used for analysis and three real earthquakes excitation are applied as base acceleration. The results show that influence of fluid-structure interaction effects on the permanent displacement of a gravity quay wall constructed on relatively non-liquefiable site is not considerable.

Analysis of Fluid-Structure Interaction by Means of Dynamic Unstructured Meshes

1998 ◽  
Vol 120 (4) ◽  
pp. 792-798 ◽  
Author(s):  
F. J. Blom ◽  
P. Leyland
Keyword(s):  
Euler Equations ◽  
Fluid Structure Interaction ◽  
Fluid Motion ◽  
Inviscid Flow ◽  
Euler Method ◽  
Time Step ◽  
Fluid Structure ◽  
Large Rotation ◽  
Structure Interaction ◽  
Naca0012 Airfoil

This paper presents a computational analysis on forced vibration and fluid-structure interaction in compressible flow regimes. A so-called staggered approach is pursued where the fluid and structure are integrated in time by distinct solvers. Their interaction is then taken into account by a coupling algorithm. The unsteady fluid motion is simulated by means of an explicit time-accurate solver. For the fluid-structure interaction problems which are considered here the effects due to the viscosity can be neglected. The fluid is hence modeled by the Euler equations for compressible inviscid flow. Unstructured grids are used to discretise the fluid domain. These grids are particularly suited to simulate unsteady flows over complex geometries by their capacity of being dynamically refined and unrefined. Dynamic mesh adaptation is used to enhance the computational precision with minimal CPU and memory constraints. Fluid-structure interaction involves moving boundaries. Therefore the Arbitrary Lagrange Euler method (ALE-method) is adopted to solve the Euler equations on a moving domain. The deformation of the mesh is controlled by means of a spring analogy in conjunction with a boundary correction to circumvent the principle of Saint Venant. To take advantage of the differences between fluid and structure time scales, the fluid calculation is subcycled within the structural time step. Numerical results are presented for large rotation, pitching oscillation and aeroelastic motion of the NACA0012 airfoil. The boundary deformation is validated by comparing the numerical solution for a flat plate under supersonic flow with the analytical solution.

Study of Fluid Effects on Dynamics of Composite Structures

2009 ◽  
Author(s):  
Y. W. Kwon
Keyword(s):  
Composite Structures ◽  
Fluid Structure Interaction ◽  
Structural Models ◽  
Dynamic Responses ◽  
Water Medium ◽  
Reasonable Accuracy ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Parametric Studies ◽  
Structural Behaviors

This study investigates the effect of fluid-structure interaction on dynamic responses of submerged composite structures subjected to a mechanical loading. The research focuses on finding various parameters that affect the transient dynamic responses of these structures. Coupled fluid-structure interaction analyses of composite structures surrounded by a water medium are conducted numerically for various parametric studies, and their results are compared to those of dry structures. Furthermore, modified dry structural models are developed to represent the dynamic responses of the same structures under water with a reasonable accuracy. Those models promise to be beneficial to predict structural behaviors under water without an expensive computational or experimental cost.

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