Numerical Modeling of Interaction of Turbulent Flow with a Buried Circular Cylinder on a Plane Surface

Year 2019, Volume: 30 Issue: 6, 9621 - 9645, 01.11.2019

M. Sami Akoz Oğuz Şimşek , N. Göksu Soydan

https://doi.org/10.18400/tekderg.432310

Cited By: 6

Abstract

Turbulent flow
characteristics around a partially buried horizontal circular cylinder are
investigated numerically for the burial ratio of B/D=0.50. The governing equations are numerically solved using ANSYS-Fluent
for the flows having the same conditions with the experiments related to measurements
of velocity field by Particle Image Velocimetry for Reynolds numbers based on
the cylinder diameter, in the ranges of 1000 ≤ Re_D ≤ 7000. Standard k-ε, Renormalization-group
k-ε,
Realizable k-ε, Modified k-ω, Shear Stress Transport k-w and Reynolds Stress
turbulence models are employed. Experimental validations of the numerical
results show that Shear Stress Transport k-w model provides better predictions for the kinematic
properties of the turbulent flow than the other turbulence models used herein.
Force coefficients also predicted numerically at Reynolds numbers in the ranges
of 1000 £Re_D £7000 for the burial
ratio, B/D=0, 0.25 and 0.5. 

Keywords

PIV, Buried cylinder, Force coefficients, Turbulence models, Vortical flow

Numerical Modeling of Interaction of Turbulent Flow with a Buried Circular Cylinder on a Plane Surface

Abstract

Turbulent flow
characteristics around a partially buried horizontal circular cylinder are
investigated numerically for the burial ratio of B/D=0.50. The governing equations are numerically solved using ANSYS-Fluent
for the flows having the same conditions with the experiments related to measurements
of velocity field by Particle Image Velocimetry for Reynolds numbers based on
the cylinder diameter, in the ranges of 1000 ≤ Re_D ≤ 7000. Standard k-ε, Renormalization-group k-ε,
Realizable k-ε, Modified k-ω, Shear Stress Transport k-w and Reynolds Stress
turbulence models are employed. Experimental validations of the numerical
results show that Shear Stress Transport k-w model provides
better predictions for the kinematic properties of the turbulent flow than the
other turbulence models used herein. Force coefficients also predicted
numerically at Reynolds numbers in the ranges of 1000 £Re_D £7000 for the burial
ratio, B/D=0, 0.25 and 0.5. 

Keywords

Buried cylinder, Force coefficients, PIV, Turbulence models

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