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All Journal International Journal of Advances in Applied Sciences Martabe : Jurnal Pengabdian Kepada Masyarakat Kumawula: Jurnal Pengabdian Kepada Masyarakat Jurnal Sintaks Logika (JSilog) Jurnal Teknologi Informasi JURUTERA (Jurnal Umum Teknik Terapan) Journal Innovations Computer Science Jurnal Masyarakat Berdikari dan Berkarya (MARDIKA)
Cut, Banta
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Numerical Analysis of the Wake Interactions Between Two Tandem Cylinders at a Reynolds Number of 1×10^5 Tambunan, Muhammad Fadli; Cut, Banta; A.Abdullah, Nasruddin
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.13419

Abstract

Circular cylinders are a geometric shape widely utilized in engineering applications such as electricity poles, offshore piles, subsea pipelines, and heat exchangers, where the drag force fluctuations experienced by two tandem-arranged cylinders are known to be determined by the longitudinal spacing ratio (L/D); previous studies were conducted at a Reynolds number of 6.5 x 104. This foundation led to the initiative for further numerical simulation research aimed at analyzing the effect of L/D variations (1.5, 2.0, 3.0, and 4.0) on the flow characteristics around two such cylinders at a higher Reynolds number (1X10), utilizing a cylinder diameter (d) of 25 mm within a narrow square channel (H = 300 mm and L = 1500 mm). This study was performed using 2D unsteady RANS via Ansys Fluent Student R2 2021, employing a structured mesh and the k-ω SST turbulence model. The results revealed that the L/D = 1.5 variation shows a significantly lower rear pressure compared to L/D = 2.0, 3.0, and 4.0, where the largest pressure difference between the front (high) and the rear (very low and negative) indicates the highest pressure drag, a characteristic dominated by earlier flow separation and a large wake. Conversely, the L/D = 3.0 variation demonstrated the lowest upstream cylinder CD value (0.734) among all variations, suggesting optimal reduction, while the lowest downstream cylinder CD value (0.209) was recorded at the L/D = 1.5 spacing.
Co-Authors A.Abdullah, Nasruddin Akram, Rizalul Anam, M Khairul Arif, Zainal Atmaja, Teuku Hadi Wibowo firnanda, rizko Habibi, Ananda Husna, Juniana Manuels, Arif Muhammad Amin Muhammad Zaki Munawir Nanda, Novianda Nanda Nazar Nazar, Nazar Novianda Ryan Setiawan Sanusi Sanusi Setia, Bagus Sarul Suheri Tambunan, Muhammad Fadli Teuku Azuar Rizal Urhamdi, Nila wibowo atmaja, teuku Hadi Widodo, Syamsul Bahri Yusup, Intan Zainuddin, Zainuddin