3-D Dynamic Simulation on Fluid-Structure Interaction of Air Flowing Around Prism

2014 ◽  
Author(s):  
Junlei Wang ◽  
JingYu Ran ◽  
Lin Ding ◽  
Li Zhang
Keyword(s):  
Lead Zirconate Titanate ◽  
Bluff Body ◽  
Fluid Structure Interaction ◽  
Wind Tunnel Test ◽  
Lead Zirconate ◽  
Bluff Bodies ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fluid Field ◽  
Wind Induced Vibration

In this paper, a new method of generating power by “wind-induced vibration” (WIV). A lead zirconate titanate (PZT) beam which has a very high power density is installed on the bluff body which will have WIV with the bluff body has been explored. Both numerical computation and experimental work have been taken to measure the capacity of the power generating system. Two different shapes of bluff bodies have been tested. In numerical section, the lift and drag coefficient and the vortex shedding frequency have been computed to verify how the dimensionless parameter Vr affects the fluid field. An one-degree-freedom system has been added to describe the wind-induced vibration, and the vibrational frequency and amplitude of the vibration have been monitored. The fluid-structure interaction has been solved by a hybrid method of finite volume method (FVM) and finite element method (FEM). From numerical simulation, the conclusions can be given that as the non-dimensionalised mass m* is about 780, the vortex induced vibration (VIV) response of a single cylinder is quite different comparing with Govardhan&Williamson. Then a wind tunnel test has been taken to measure the voltage output of the PZT, and we have gotten a result quite close to the data of numerical method.

Extended Hamilton’s Principle for Fluid-Structure Interaction

2003 ◽  
Author(s):  
Haym Benaroya ◽  
Timothy Wei
Keyword(s):  
Vortex Shedding ◽  
Bluff Body ◽  
Fluid Structure Interaction ◽  
Flow Characteristics ◽  
Extensive Literature ◽  
Bluff Bodies ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Extended Hamilton’S Principle ◽  
The Subject

The problem of vortex-shedding from bluff bodies has been examined for over a century, as reflected by the extensive literature on the subject. The focus of these foregoing researches can be split into two broad categories: investigations into the flow characteristics around a body in a flow, and studies of the response of a bluff body to the forces from the flow.

On a Partitioned Strong Coupling Algorithm for Modeling Fluid–Structure Interaction

2015 ◽  
Vol 07 (02) ◽  
pp. 1550021 ◽  
Author(s):  
Tao He
Keyword(s):  
Finite Element ◽  
Strong Coupling ◽  
Bluff Body ◽  
Stokes Equations ◽  
Fluid Structure Interaction ◽  
Structural Equations ◽  
Mass Source ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Coupling Algorithm

This paper presents a partitioned strong coupling algorithm for fluid–structure interaction in the arbitrary Lagrangian–Eulerian finite element framework. The incompressible Navier–Stokes equations are solved by the semi-implicit characteristic-based split (CBS) scheme while the structural equations are temporally advanced by the Bathe method. The celled-based smoothed finite element method is adopted for the solution of a geometrically nonlinear solid. To update the dynamic mesh, the moving submesh approach is performed in conjunction with the ortho-semi-torsional spring analogy method. A mass source term is implanted into the pressure Poisson equation to respect the geometric conservation law for the fractional-step-type CBS fluid solver. The iterative solution is achieved by fixed-point method with Aitken's Δ2 accelerator. The proposed methodology is validated against flow-induced oscillations of a bluff body and a flexible body. The overall numerical results agree well with the available data. Some important flow phenomena have been disclosed successfully.

3-D Modeling of Fluid-Structure Interaction With External Flow Using Coupled LBM and FEM

2007 ◽  
Author(s):  
Y. W. Kwon ◽  
J. C. Jo
Keyword(s):  
Lattice Boltzmann ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
External Flow ◽  
Computationally Efficient ◽  
Fluid Structure ◽  
Shell Elements ◽  
Structure Interaction ◽  
Beam Elements ◽  
Fluid Field

Three dimensional fluid-structure interaction was modeled using the coupled lattice Boltzmann and finite element methods. The latter technique was applied to model the structural behavior while the former was used to model the fluid field. For computationally efficient modeling of external flow over embedded pipes with their interaction, the pipes were modeled using 3-D beam elements rather than shell elements. This paper presents an algorithm for how to couple 3-D beam finite elements with the lattice Boltzmann grids so that the fluid-structure interaction can be properly modeled at the outer surfaces of pipes. Some numerical examples were analyzed using the developed technique, and the fluid-structure interaction characteristics were examined through the examples.

Simulation of the fluid–structure-interaction of steam generator tubes and bluff bodies

2008 ◽  
Vol 238 (8) ◽  
pp. 2048-2054 ◽  
Author(s):  
Karl Kuehlert ◽  
Stephen Webb ◽  
David Schowalter ◽  
William Holmes ◽  
Amarvir Chilka ◽  
...  
Keyword(s):  
Steam Generator ◽  
Fluid Structure Interaction ◽  
Bluff Bodies ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Steam Generator Tubes

A Strongly Coupled Fluid Structure Interaction Solution for Transient Soft Elastohydrodynamic Lubrication Problems in Reciprocating Rod Seals Based on a Combined Moving Mesh Method

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Haiping Gao ◽  
Baoren Li ◽  
Xiaoyun Fu ◽  
Gang Yang
Keyword(s):  
Fluid Structure Interaction ◽  
Elastohydrodynamic Lubrication ◽  
Moving Mesh ◽  
Moving Mesh Method ◽  
Fluid Structure ◽  
Strongly Coupled ◽  
Structure Interaction ◽  
Fluid Field ◽  
Mesh Method ◽  
Rod Seals

Soft elastohydrodynamic lubrication (EHL) problems widely exist in hydraulic reciprocating rod seals and pose great challenges because of high nonlinearity and strong coupling effects, especially when the EHL problems are of high dimensions. In this paper, a strongly coupled fluid structure interaction (FSI) model is proposed to solve the transient soft EHL problems in U-cup hydraulic reciprocating rod seals. The Navier–Stokes equations, rather than the Reynolds equation, are employed to govern the whole fluid field in the soft EHL problems, with the nonlinearity of the solid taken into consideration. The governing equations of the fluid and solid fields are combined into one equation system and solved monolithically. To determine the displacements of nodes of the fluid field, a new moving mesh method based on the combination of the Laplace equation and the leader–follower methods is put forward. At last, the proposed FSI model runs successfully with the moving mesh method, and the boundaries of the hydrodynamic lubrication zones and the hydrostatic zones are formed automatically and change dynamically during the coupling process. The results are as follows: The soft EHL problems show typical characteristics, like the constriction effects of the lubricating films, and the law of dynamic development of the lubricating films and the fluid pressures is revealed. The minimum stroke lengths needed to generate complete lubricating films vary with the rod speeds and movement directions, so the design of the rod seals should be paid close attention to, in particular the rod seals of short stroke lengths. Furthermore, along with the dynamic development processes of the fluid pressures during the instroke of U-cup seals, the lubricating film humps expand and locate between the fluid pressure abrupt points and the outlet zones. After the U-cup seals reach the steady-states, the fluid abrupt points disappear and no changes of the film humps are observed. Theoretically, the proposed method can be popularized to solve similar soft EHL problems.

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