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All Journal Jurnal Simetris Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi International Journal of Marine Engineering Innovation and Research
Ridwan Daris Naufal
Universitas Pembangunan Nasional Veteran Jakarta
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Utilization of Single and Double Orifice Plates in Pipe Inner Flow Structure by Computational Method Ridwan Daris Naufal; James Julian; Fitri Wahyuni; Riki Hendra Purba; Nely Toding Bunga
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 1 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i1.7913

Abstract

The orifice plate is a device that disrupts the flow in the pipe. The disturbed flow results in the formation of flow structures. The flow structure formed can be utilized for several applications such as multi-fluid mixing and microbubble generator. Using orifice plates to utilize the flow structure results in more significant pressure loss. This study aims to identify the characteristics of the flow structure generated by single and double orifice plates with 1D and 2D spacing at various Reynolds numbers, namely Re = 1×104, 5×104, 1×105, and 5×105, as a basis for application in these various applications. The results show that single and double orifice plates can produce flow structure phenomena such as recirculation and vortex regions. The recirculation area is formed smaller in the double orifice plate due to the flow that is separated faster to converge back to the pipe wall but broader so that the flow of the orifice plate is narrower. Increasing the applied Reynold's number causes the separated flow to reconnect to the pipe wall faster, resulting in a smaller recirculation area. Double orifice plates are more suitable for applications that require a certain degree of mixing or pressure distribution, but with a consequent more significant pressure loss. Meanwhile, single plates can be used for simple needs with little pressure loss.
Numerical Study of Fillet Effects on Cavitation Development in Double Contraction Pipes Ridwan Daris Naufal; Damora Rhakasywi; Fahrudin Fahrudin
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 3 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i3

Abstract

Study of Aerodynamics Characteristics of Popular Sports Utility Vehicle in Indonesia James James Julian; Fitri Wahyuni; Rizki Aldi Anggara; Ridwan Daris Naufal
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol. 16 No. 2 (2025): JURNAL SIMETRIS VOLUME 16 NO 2 TAHUN 2025
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/simet.v16i2.10890

Abstract

The concept of aerodynamics is an essential aspect of designing a vehicle. In this study, the aerodynamic characteristics of the Sports Utility Vehicle (SUV) model are investigated using a numerical approach. This study uses three popular SUV models in Indonesia, including the Toyota Fortuner, Mitsubishi Pajero, and Hyundai Santa Fe. The three SUV models were tested at three different speed variations, including 20 km/h, 50 km/h, and 100 km/h. Based on the computational results, it was found that each SUV model produced a CD value that varied between 0.32 and 0.38. The highest CD value was obtained by the Toyota Fortuner, followed by two other vehicle models, including the Mitsubishi Pajero and Hyundai Santa Fe. The CD value obtained by each vehicle is dominated by drag pressure. This condition is indicated by the flow separation phenomenon, which causes a recirculation zone. In addition, the large frontal area causes an increase in stagnation pressure so that the pressure difference between the front and rear sides of the vehicle body causes significant drag. Based on the drag reduction percentage, the Hyundai Santa Fe Vehicle is the most aerodynamic vehicle model, with its ability to reduce drag by up to 6,604%. In addition, the Mitsubishi Pajero can reduce drag by up to 2,187%. On the other hand, the Toyota Fortuner cannot reduce drag because it has a CD value that is higher than the average CD value for SUV models.
Co-Authors Bunga, Nely Toding Damora Rhakasywi Fahrudin Fahrudin Fitri Wahyuni James James Julian James Julian Riki Hendra Purba Rizki Aldi Anggara