Numerical simulation of cross-flow around four circular cylinders in-line square configuration near a plane wall

A. Grummy Wailanduw*, Triyogi Yuwono, Wawan Aries Widodo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Flow cross around circular cylinders arrangement could be found in many engineering application, such as reaction tower, cooling tower, shell and tube heat exchangers, and tube banks. When flow crosses the bodies, it would form particular flow pattern according to the body's arrangements. Author [19], investigated a four circular cylinders arrangement near wall with spacing ratio (L/D) = 1.5 and gap ratio (G/D) of 0.2. They found that interaction between cylinders and wall caused a difference stagnation point in upstream cylinders and shear layer of upstream cylinders reattach in downstream cylinders. In this research, it would be investigated numerically flow characteristics on four circular cylinders in in-line square configuration near a plane wall. A gap ratio between the surface of lower cylinders and the wall (G/D) would be varied. It is set at G/D= 0.1, 0.3, and 1.0, while spacing ratio between centre of cylinders (L/D) was fixed at 4.0. To analyze flow characteristics around cylinders is used FLUENT 6.3.26 software. Two-dimensional Unsteady Reynolds Averaged Navier Stokes equations and SST k-ω turbulence equations are solved with finite volume method. This simulation was performed at Reynolds number 53000 based on a single circular cylinder diameter. The numerical results show that an increasing of gap ratio cause of stagnation point of the upstream cylinder of lower row move to front of cylinder, while the upstream cylinder of upper row tends to not change. At the gap ratio G/D= 0.1 and G/D= 0.3, shear layer of the upstream cylinder of lower row cover the downstream cylinder of lower row, while a different phenomenon occur in the downstream cylinder of upper row. Shear layer of the upstream cylinder of upper row reattach on surface of the downstream cylinder of upper row.

Original languageEnglish
Pages (from-to)812-817
Number of pages6
JournalARPN Journal of Engineering and Applied Sciences
Volume11
Issue number2
Publication statusPublished - 2016

Keywords

  • Four circular cylinders
  • In-line square
  • Numerical simulation
  • Plane wall

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