Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Free surface flow past a circular cylinder under forced rotary oscillations
Date
2014-07-25
Author
Kocabıyık, Serpıl
Bozkaya, Canan
Liverman, E.
Metadata
Show full item record
Item Usage Stats
203
views
0
downloads
Cite This
Numerical results of a viscous incompressible two-fluid model with an oscillating cylinder are analyzed. Specifically, two-dimensional flow past a circular cylinder subject to forced rotational oscillations beneath a free surface is considered. Numerical method is based on the finite volume method for solving the two-dimensional continuity and unsteady NavierStokes equations. The numerical simulations are carried out at a Reynolds number of R = 200 and a Froude number F r = 0.2, and the cylinder submergence depth, h = 0.75. The flow characteristics are examined for combinations of the maximum angular cylinder displacement and the forcing cylinder oscillation frequency-to-natural vortex shedding frequency ratio (θm = 15◦ − 75◦ and f/f0 = 0.5 − 4.0). The main objective of this study is to address the alterations of the near-wake region, in particular, the flow regimes and the locked-on vortex formation modes, due to the presence of the free surface. This investigation has shown that it is possible to generate distinctly different patterns of vortex formation than that of classical vortex shedding modes in the presence of the free surface depending on the values of the maximum angular cylinder displacement and the frequency ratio. The new vortex shedding modes are the combination of the two, three and four of the well known classical modes. The effect of the maximum angular displacement amplitude, θm, and the frequency ratio, f/f0, on fluid forces and the pressure field is also analyzed. Good comparisons with previous studies are obtained
Subject Keywords
Cylinder
,
Two-fluid Model
,
Incompressible
,
Viscous
,
Computation
URI
https://hdl.handle.net/11511/79528
http://congress.cimne.com/iacm-eccomas2014/admin/files/fileabstract/a4125.pdf
Conference Name
IACM and ECCOMAS joint organization of 11th World congress on Computational Mechanics (WCCM XI)-5th. European Conference on Computational Mechanics(ECCM V)-6th European Conference on Computational Fluid Dynamics (ECFD VI), 20 - 25 Temmuz 2014
Collections
Department of Mathematics, Conference / Seminar
Suggestions
OpenMETU
Core
Streamwise oscillations of a cylinder beneath a free surface: Free surface effects on fluid forces
Kocabiyik, Serpil; Bozkaya, Canan (2015-11-01)
A two-dimensional free surface flow past a circular cylinder forced to perform streamwise oscillations in the presence of an oncoming uniform flow is investigated at a Reynolds number of R=200 and fixed displacement amplitude, A=0.13, for the forcing frequency-to-natural shedding frequency ratios, f/f(0) = 1.5, 2.5, 3.5. The present two-fluid model is based on a velocity-pressure formulation of the two-dimensional continuity and unsteady Navier-Stokes equations. The continuity and Navier-Stokes equations ar...
Free surface wave interaction with an oscillating cylinder
Bozkaya, Canan (2014-01-01)
The numerical solution of the special integral form of two-dimensional continuity and unsteady Navier Stokes equations is used to investigate vortex states of a horizontal cylinder undergoing forced oscillations in free surface water wave. This study aims to examine the consequence of degree of submergence of the cylinder beneath free surface at Froude number 0.4. Calculations are carried out for a single set of oscillation parameters at a Reynolds number of R = 200. Two new locked-on states of vortex forma...
Streamwise oscillations of a cylinder beneath a free surface: Free surface effects on vortex formation modes
Bozkaya, Canan; Mironova, L. A.; Gubanov, O. I. (Elsevier BV, 2011-06-15)
A computational study of a viscous incompressible two-fluid model with an oscillating cylinder is investigated at a Reynolds number of 200 and at a dimensionless displacement amplitude of A = 0.13 and for the dimensionless forcing cylinder oscillation frequency-to-natural vortex shedding frequency ratios, f/f(0) = 1.5, 2.5, 3.5. Specifically, two-dimensional flow past a circular cylinder subject to forced in-line oscillations beneath a free surface is considered. The method is based on a finite volume discr...
Incompressible flow simulations using least squares spectral element method on adaptively refined triangular grids
Akdağ, Osman; Sert, Cüneyt; Department of Mechanical Engineering (2012)
The main purpose of this study is to develop a flow solver that employs triangular grids to solve two-dimensional, viscous, laminar, steady, incompressible flows. The flow solver is based on Least Squares Spectral Element Method (LSSEM). It has p-type adaptive mesh refinement/coarsening capability and supports p-type nonconforming element interfaces. To validate the developed flow solver several benchmark problems are studied and successful results are obtained. The performances of two different triangular ...
Least-squares spectral element solution of incompressible Navier-Stokes equations with adaptive refinement
Ozcelikkale, Altug; Sert, Cüneyt (2012-05-01)
Least-squares spectral element solution of steady, two-dimensional, incompressible flows are obtained by approximating velocity, pressure and vorticity variable set on GaussLobatto-Legendre nodes. Constrained Approximation Method is used for h- and p-type nonconforming interfaces of quadrilateral elements. Adaptive solutions are obtained using a posteriori error estimates based on least squares functional and spectral coefficient. Effective use of p-refinement to overcome poor mass conservation drawback of ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Kocabıyık, C. Bozkaya, and E. Liverman, “Free surface flow past a circular cylinder under forced rotary oscillations,” presented at the IACM and ECCOMAS joint organization of 11th World congress on Computational Mechanics (WCCM XI)-5th. European Conference on Computational Mechanics(ECCM V)-6th European Conference on Computational Fluid Dynamics (ECFD VI), 20 - 25 Temmuz 2014, Barcelona, İspanya, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/79528.
