Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

SIMULATION OF FLOW THROUGH AN EQUISPACED IN-LINE CYLINDER IN OPEN CHANNELS


DOI: 10.5937/jaes0-40078 
This is an open access article distributed under the CC BY 4.0
Creative Commons License

Volume 21 article 1069 pages: 253-262

Sanaa A. Talab Al-Osmy
Water Resources Engineering Department, College of Engineering, Mustansiriyah University

Shaymaa A.M. Al-Hashimi
Water Resources Engineering Department, College of Engineering, Mustansiriyah University

Saad Mulahasan
Water Resources Engineering Department, College of Engineering, Mustansiriyah University

Sabah H. Fartosy*
Water Resources Engineering Department, College of Engineering, Mustansiriyah University

In this work, a numerical simulation using Computation Fluid Dynamics technique was used to investigate the flow properties and turbulence characteristics through flow of one-line cylinder in an open channel with uniform flow conditions. A two-dimensional turbulence model was applied using ANSYS. Flow properties were investigated against varying cylinder diameters that forms a one-line cylinder physical model and varying flow rates. Three cylinders diameters D were used (5.0 cm, 2.5 cm and 1.25 cm) and located at 12.5 cm apart along the flume centre-line. Spatial distributions of mean-stream-wise velocity, pressure, turbulent kinetic energy, and eddy viscosity were estimated. Results showed symmetrical distribution of flow velocity, turbulence eddy, and turbulent kinetic energy along the one-line cylinder for the largest cylinder diameter. Vortex shedding patterns were well predicted by the numerical simulation behind the cylinders. Different configurations of vortices distribution behind the cylinders were recorded for the diameters of 1.25 cm and 2.5 cm. The flow pattern difference between the largest diameter (5 cm) and the small diameters (2.5 cm and 1.25 cm) was leaded to the strong overlap for the vortices in the wake for the lined cylinders with the large diameter in comparison to the other diameters. Consequently, this study is investigated the different diameter sizes of a one-line cylinder with the same spacing between them on the flow pattern along the channel.

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The authors would like to thanks Mustansiriyah University (https://uomustansiriyah.edu.iq/), Baghdad-Iraq for its support in the present work.

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