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ijcoe 2016, 4 - : 19-25 Back to browse issues page
Oscillating Motion of Triangular Cylinder in a Viscous Fluid
Hamid Malah , Yuri Sergeyevich Chumakov , Sara Ramzani Movafagh
Department of Hydroaerodynamics, Institute of Applied Mathematics and Mechanics, Peter the Great St.Petersburg Polytechnic University, St. Petersburg, 194064, Russia
Abstract:   (256 Views)
The system consisting of two rigid bodies in a viscous fluid is considered. The main body with mass M is placed in a viscous incompressible fluid, and the body with mass m moves inside the main body. This system is known as vibrobot which can be used in arbitrary inspection fluid mechanic objects such as oil industries pipes and tanks, as well as marine industries, medicine, etc. In this paper, the interaction between the vibrobot and viscous fluid is studied to achieve the motion laws of the vibrobot with the harmonic oscillation of internal mass. Also the flow structure around vibrobot and its effects on the hydrodynamic force acting on the vibrobot are investigated. Analyses are carried out by direct numerical simulation of the vibrobot motion in a viscous fluid by OpenFOAM package. Calculations are performed for the following combinations of control parameters; The ratio of the viscous fluid mass to the vibrobot mass μ_1=0.35, the ratio of the internal mass to the vibrobot mass μ_2=0.325 and dimensionless oscillation frequency f=1/5, when Reynolds number takes values in the range of 50<Re<250. Calculations have been performed with different initial approximations, determined by different initial velocities of the incident flow.
Keywords: Triangular cylinder Harmonic oscillation Movable internal mass Numerical simulation OpenFOAM Viscous fluid.
Full-Text [PDF 525 kb]   (86 Downloads)    
Type of Study: Research | Subject: Sub-sea Technology
Received: 2018/01/25 | Accepted: 2018/01/25 | Published: 2018/01/25
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Malah H, Chumakov Y S, Ramzani Movafagh S. Oscillating Motion of Triangular Cylinder in a Viscous Fluid . ijcoe. 2016; 4 :19-25
URL: http://ijcoe.org/article-1-82-en.html

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International Journal of Coastal and Offshore Engineering International Journal of Coastal and Offshore Engineering
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