scholarly journals Fluid Structure Interaction of Flow Induced Vibration: A study of Laminar and Turbulent flow fields

2008 ◽  
Vol 2 (2) ◽  
pp. 703-711
Author(s):  
Nadeem Ahmed SHEIKH ◽  
Qamar IQBAL ◽  
Shahab KHUSHNOOD ◽  
Ali El GHALIBAN
Keyword(s):  
Turbulent Flow ◽  
Fluid Structure Interaction ◽  
Flow Fields ◽  
Flow Induced Vibration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Laminar And Turbulent Flow

scholarly journals Two-way fluid-structure interaction study of twisted tape insert in a circular tube having integral fins with nanofluid

2021 ◽  
Vol 3 (8(111)) ◽  
pp. 25-34
Author(s):  
Mustafa Abdulsalam Mustafa ◽  
Atheer Raheem Abdullah ◽  
Wajeeh Kamal Hasan ◽  
Laith J. Habeeb ◽  
Maadh Fawzi Nassar
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Heat Transfer Enhancement ◽  
Circular Tube ◽  
Fluid Structure Interaction ◽  
Twisted Tape ◽  
Transfer Enhancement ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Laminar And Turbulent Flow

This work deals with fluid-structure interaction (FSI), one of the emerging areas of numerical simulation and calculation. This research shows a numerical study investigating heat transfer enhancement and fluid-structure interaction in a circular finned tube by using alumina nanofluid as a working fluid with a typical twisted tape that has a twisting ratio of 1.85. The studied nanofluid volumes of fraction are φ=0, 3, 5 % under conditions of laminar and turbulent flow. The solution for such problems is based on the relations of continuum mechanics and is mostly done with numerical methods. FSI occurs when the flow of fluid influences the properties of a structure or vice versa. It is a computational challenge to deal with such problems due to complexity in defining the geometries, nature of the interaction between a fluid and solid, intricate physics of fluids and requirements of computational resources. CFD investigations were made based on the numerical finite volume techniques to solve the governing three-dimensional partial differential equations to get the influence of inserted twisted tape and concentration of nanofluid on heat transfer enhancement, friction loss, average Nusselt number, velocity profile, thermal performance factor characteristics, and two-way interaction in a circular tube at laminar and turbulent flow. The governing continuity, momentum and energy transfer equations are solved using Ansys Fluent and Transient Structural. The simulation results show that the deformations of two-way coupling fluctuate from side to side, with 0.004 mm, as maximum amplitude, located at the typical twisted tape center. Heat transfer dissipation improved by adding fins and as Reynolds numbers increase the heat transfer behavior increases.

An Overview of IAEA Technical Guidelines on Fluid-Structure Interaction

2014 ◽  
Author(s):  
M. Kim ◽  
P. Hughes ◽  
R. A. Ainsworth
Keyword(s):  
Fluid Structure Interaction ◽  
Cross Flow ◽  
External Loading ◽  
Flow Induced Vibration ◽  
Energy Agency ◽  
Fluid Structure ◽  
Safety Standards ◽  
Structure Interaction ◽  
Fluid Sloshing ◽  
Reactor Types

This paper provides an overview of International Atomic Energy Agency (IAEA) draft technical guidelines on Fluid-Structure Interaction (FSI), which is supporting document for IAEA Safety Standards aimed at providing method and practices. The technical guidelines are based on sections in codes and standards, more general documents on FSI and documents describing particular plant issues or problems. The technical guidelines recognise that FSI has led to a range of problems in a range of reactor types including: flow-induced vibration in light water reactor (LWR) steam generators under external loading including seismic loading; fretting of LWR heat exchangers with the fretting loading dependent on cross-flow velocity; seismic effects and fluid sloshing in liquid metal cooled faster breeder reactor (LMFBR); and water hammer. In addition to providing an overview description of the technical guidelines, the paper also describes the process followed to produce and obtain peer review of the document.

Fluid-Structure Interaction Modeling of a Subsea Jumper Pipe

2014 ◽  
Author(s):  
Mohammad A. Elyyan ◽  
Yeong-Yan Perng ◽  
Mai Doan
Keyword(s):  
Multiphase Flow ◽  
Numerical Simulations ◽  
Numerical Study ◽  
Fluid Structure Interaction ◽  
Flow Experience ◽  
Flow Induced Vibration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Start Up ◽  
Interaction Modeling

Flow-induced vibration (FIV) is one of the main reasons for subsea piping failure, where subsea pipes, which typically carry multiphase flow, experience large fluctuating forces. These fluctuating forces can induce severe vibrations leading to premature piping failure. This paper presents a transient numerical study of a typical subsea M-shape jumper pipe that is carrying a gas-liquid multiphase flow subject to a slug frequency of 4.4 Hz, starting from rest to include the start-up effect as part of the study. 3-D numerical simulations were used to capture the fluid-structure interaction (FSI) and estimate pipe deformations due to fluctuating hydrodynamic forces. In this paper, two FSI approaches were used to compute the pipe deformations, two-way coupled and one-way decoupled. Analysis of the results showed that decoupled (one-way) FSI approach overestimated the peak pipe deformation by about 100%, and showed faster decay of fluctuations than coupled (two-way) FSI analysis. The assessment of resonant risk due to FIV is also discussed.

Optimal Design of Impeller for Centrifugal Compressor Under the Influence of Fluid-Structure Interaction

2015 ◽  
Author(s):  
Hyun-Su Kang ◽  
Yoo-June Song ◽  
Youn-Jea Kim
Keyword(s):  
Optimal Design ◽  
Centrifugal Compressor ◽  
Fluid Structure Interaction ◽  
Aerodynamic Performance ◽  
Response Surfaces ◽  
Design Parameters ◽  
Flow Induced Vibration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Whole Process

In this study, a method for optimal design of impeller for centrifugal compressor under the influence of flow-induced vibration (FIV) using fluid-structure interaction (FSI) and response surface method (RSM) was studied. Numerical simulation was conducted using ANSYS with various configurations of impeller geometry. Each of the design parameters was divided into 3 levels. Total 15 design points were planned by central composite design (CCD) method, which is one of the design of experiment (DOE) techniques. Response surfaces generated based on the DOE results were used to find the optimal shape of impeller for high aerodynamic performance. The whole process of optimization was conducted using ANSYS Design Xplorer (DX). Through the optimization, structural stability and aerodynamic performance of centrifugal compressor were improved.

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