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All Journal IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Fajrin Gimnastiar
Universitas Pendidikan Indonesia
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Pengaruh Bentuk dan Diameter Comb terhadap Karakteristik Aliran Miniatur Wind Tunnel Menggunakan Computational Fluid Dynamics Fajrin Gimnastiar; Yusep Sukrawan; Tatang Permana; Muhamad Maris Al Gifari; Ridwan Adam Muhamad Noor
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.482

Abstract

This study aimed to determine the comb configuration that provides the most uniform flow distribution with low turbulence and pressure loss. Four comb configurations, namely circular, square, 3 mm-diameter hexagonal, and 6 mm-diameter hexagonal configurations, were analyzed using Autodesk Computational Fluid Dynamics under steady-state conditions with an inlet velocity of 30 m/s. We evaluated flow characteristics based on mean velocity, velocity standard deviation, coefficient of variation, uniformity index, turbulence intensity, and pressure drop. With a test-section hydraulic diameter of 89 mm, the Reynolds number of the main flow was calculated as 1.81 × 10⁵. The results showed that the 6 mm-diameter hexagonal comb performed best, with a mean velocity of 29.982 m/s, a velocity standard deviation of 0.517 m/s, a coefficient of variation of 1.725%, a uniformity index of 99.281%, a turbulence intensity of 0.608%, and a pressure drop of 0.592 kPa. This configuration produced the most uniform velocity distribution, low velocity fluctuation and turbulence intensity, and low pressure loss. Therefore, the 6 mm-diameter hexagonal comb was selected as the best configuration.
Co-Authors Muhamad Maris Al Gifari Muhammad Noor, Ridwan Adam Tatang Permana, Tatang