Interactions Between Vortex-Induced Vibration of a Spring-Supported Cylinder and Fluid Flow in a Narrow Channel

2002 ◽  
Author(s):  
Masahito Nakano ◽  
Shinichi Maruyama ◽  
Hideyuki Mihira ◽  
Masatsugu Yoshizawa
Keyword(s):  
Reynolds Number ◽  
Fluid Flow ◽  
Narrow Channel ◽  
Simultaneous Equations ◽  
Nonlinear Interactions ◽  
Two Dimensional ◽  
Vortex Induced Vibration ◽  
Incompressible Viscous Flow ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid

This paper studies the nonlinear interactions between vortex-induced vibration of a spring-supported circular cylinder and the unsteady fluid flow in a narrow channel. The analytical model consists of two-dimensional incompressible viscous flow in a narrow channel at low Reynolds number, and the spring-supported cylinder that can move perpendicular to the wall of the channel. The marker-and-cell (MAC) method is used to calculate numerically the simultaneous equations governing the interaction between the motion of the cylinder and the unsteady fluid flow. Furthermore the numerical results are confirmed by experiments presented herein.

Vortex-Induced Vibration of a Cylinder Spring-Supported in a Narrow Channel: Influence of Spring Stiffness on the Interaction of Cylinder Vibration and Unsteady Fluid Flow

2005 ◽  
Author(s):  
Shunsuke Aritomi ◽  
Shinichi Maruyama ◽  
Kenya Ito ◽  
Masatsugu Yoshizawa
Keyword(s):  
Fluid Flow ◽  
Angular Displacement ◽  
Fluid Velocity ◽  
Narrow Channel ◽  
Simultaneous Equations ◽  
Vortex Induced Vibration ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid ◽  
Micro Systems ◽  
Theoretical Results

This paper deals with the nonlinear interaction between vortex-induced vibration of a spring-supported cylinder and unsteady fluid flow in a narrow channel. In particular, we remark the stiffness of the spring with which the cylinder is supported, and investigate the influence of the stiffness on the above nonlinear interactions. Such a problem becomes very important in micro systems where the force acting on a surface area can’t be neglected compared with that acting on a volume, and the flow is laminar at low Reynolds number. In this paper, the motion of the cylinder and the fluid velocity are synchronously measured with an angular displacement meter and a PIV system. Furthermore, the theoretical results are obtained by solving the simultaneous equations governing motion of the cylinder and fluid flow numerically, in order to compare with the experimental results. Finally, we examine the unsteady fluid force acting on the cylinder theoretically.

741 Synchronized Measurement of Unsteady Fluid Flow around a Cylinder and Vibration of the Cylinder in a Narrow Channel

2004 ◽  
Vol 2004 (0) ◽  
pp. _741-1_-_741-6_
Author(s):  
Shunsuke ARITOMI ◽  
Kiyoshi NAGASAWA ◽  
Shinichi MARUYAMA ◽  
Tsukasa YONEYAMA ◽  
Masatsugu YOSHIZAWA
Keyword(s):  
Fluid Flow ◽  
Narrow Channel ◽  
Flow Around A Cylinder ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid

A Two-Dimensional CFD Simulation for Different Spacers of Spiral Wound Moudles

2012 ◽  
Vol 557-559 ◽  
pp. 2249-2252 ◽  
Author(s):  
Song Lin Xu ◽  
Wen Qiang Mi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Cfd Simulation ◽  
Two Dimensional ◽  
Cfd Model ◽  
Visual Method ◽  
Unsteady Fluid Flow ◽  
Computational Fluid Dynamics Cfd ◽  
Unsteady Fluid

A computational fluid dynamics (CFD) model was used to simulate unsteady fluid flow in a two-dimensional channel. The flow was computed for several different geometries and velocity. Calculations show different flow patterns of the cavity spacer, the submerged spacer and the zigzag spacer. Applications of two-dimensional CFD simulation give a visual method to determine the advantages of each spacer type.

scholarly journals Fluid boundaries shaping using the method of kinetic balance

2006 ◽  
Vol 10 (4) ◽  
pp. 153-162
Author(s):  
Miroslav Benisek ◽  
Svetislav Cantrak ◽  
Milos Nedeljkovic ◽  
Djordje Cantrak ◽  
Dejan Ilic ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Fluid Mechanics ◽  
Cross Sections ◽  
Hydraulic Engineering ◽  
Optimum Shape ◽  
Curved Channels ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid ◽  
Flow Boundaries ◽  
Dead Water

Fluid flow in curved channels with various cross-sections, as a common problem in theoretical and applied fluid mechanics, is a very complex and quite undiscovered phenomenon. Defining the optimum shape of the fluid flow boundaries, which would ensure minimum undesirable phenomena, like "dead water" zones, unsteady fluid flow, etc., is one of the crucial hydraulic engineering?s task. Method of kinetic balance is described and used for this purpose, what is illustrated with few examples. .

scholarly journals INTEGRATED MODEL «RESERVOIR - WELL - PUMP» FOR UNSTEADY FLUID FLOW REGIMES CALCULATING

2021 ◽  
Vol 19 (1) ◽  
pp. 33
Author(s):  
A.A. Pashali ◽  
R.S. Khalfin ◽  
D.V. Silnov ◽  
A.S. Topolnikov ◽  
B.M. Latypov ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Flow Regimes ◽  
Integrated Model ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid ◽  
Fluid Flow Regimes

THE IMPACT OF SELECTED PARAMETERS ON PRESSURE DISTRIBUTION IN THE FACE THROTTLE OF A CENTRIFUGAL PUMP AUTOMATIC BALANCING DEVICE

Tribologia ◽  
2021 ◽  
Vol 297 (3) ◽  
pp. 35-44
Author(s):  
Yuliia Tarasevych ◽  
Nataliia SOVENKO
Keyword(s):  
Fluid Flow ◽  
Pressure Distribution ◽  
Hydrodynamic Pressure ◽  
Centrifugal Pumps ◽  
Unsteady Fluid Flow ◽  
The Face ◽  
Unsteady Fluid ◽  
Angular Displacements ◽  
Automatic Balancing ◽  
The Impact

Face throttles are a necessary functional element of non-contact face seals and automatic balancing devices of centrifugal pumps of different constructions. To calculate the hydrodynamic forces and moments acting on the rotor and fluid flow through the automatic balancing device, it is necessary to know the pressure distribution in the cylindrical and face throttle when considering all important factors which predetermine fluid flow. The face throttle surfaces are moving, which leads to unsteady fluid flow. The movement of the walls of the face throttle causes an additional circumferential and radial flow, which subsequently leads to the additional hydrodynamic pressure components. The paper analyses viscous incompressible fluid flow in the face throttle of an automatic balancing device taking into account the axial and angular displacements of throttle’s surfaces and the inertia component of the fluid. The effect of local hydraulic losses as well as random changes in the coefficients of local hydraulic resistance at the inlet and outlet of the throttle is analysed.

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