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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin JTERA (Jurnal Teknologi Rekayasa) Angkasa: Jurnal Ilmiah Bidang Teknologi Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Journal of Applied Sciences and Advanced Technology Jurnal Bakti Masyarakat Indonesia Dinamis Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Polimesin
Riki Hendra Purba
Universitas Pembangunan Nasional Veteran Jakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Investigation of the Influence of Plate Thickness on Orifice Flow Using the Computational Fluid Dynamics Method Mokhammad Bahtiar Rivai; James Julian; Fitri Wahyuni; Riki Hendra Purba
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4286

Abstract

Piping systems provide effective fluid distribution and are crucial to industrial operations. Despite their effectiveness, flow control devices like orifice plates can result in significant pressure drop that can lower system efficiency and wear out the system’s mechanical components. This study aims to optimize orifice plate design by examining the effect of plate thickness on flow characteristics using Computational Fluid Dynamics (CFD). Simulations were conducted on orifice plates with thicknesses ranging from 1.5T to 3.0T under Reynolds numbers from 10⁴ to 10⁶. Results show that increasing the thickness reduces pressure loss, with the 3T configuration achieving a 1.35% reduction compared to the baseline. Improvements are linked to a higher discharge coefficient (Cd), shorter flow reattachment distance (Xr), smaller recirculation zones, and reduced velocity through the orifice throat. These findings suggest that geometric modifications can enhance flow performance and reduce the risk of mechanical damage in piping systems.
THE EFFECT OF OFFSET RATIO ON OFFSET JET FLOW STRUCTURE Rifqi Ramadhani; James Julian; Fitri Wahyuni; Riki Hendra Purba; Fathin Muhammad Madhudhu; Elvi Armadani
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4538

Abstract

Jet flow is a crucial fluid dynamic phenomenon that has been extensively studied. It is essential for various industrial applications, including surface cleaning, flow control, and cooling electronic components.  Offset jet is an innovation in jet flow configuration that offers advantages in flow pattern control by expanding the impingement area and regulating surface pressure distribution. This study employed a Computational Fluid Dynamics (CFD) approach to investigate the influence of variations in the offset jet ratio on the aerodynamic characteristics of the flow, specifically the impingement zone area, pressure coefficient distribution, and skin friction coefficient. The standard k-ε turbulence model, utilizing a structured mesh and a Reynolds number of 10,000, was employed in this research. The number of mesh elements used was a fine mesh of 200,000 with an error percentage of 0.09436%. The results of the study show that an offset ratio of 3 produces the highest cf value of 0.0047 and a stable Cp distribution of 0.218, while also providing the best impingement zone area. These findings indicate that OR 3 is the most optimal configuration in terms of aerodynamics for precision system applications, with a focus on flow pattern control and wide impingement zone coverage.
Investigation of Bluff Body Shape Variation on Enhancing Heat Transfer Performance of Backward-Facing Step Flow Fitri Wahyuni; Rizki Aldi Anggara; James Julian; Riki Hendra Purba; Fathin Muhammad Mahdhudhu; Elvi Armadani; Nely Toding Bunga
Jurnal ASIIMETRIK Jurnal Ilmiah Rekayasa & Inovasi Volume 8 Number 2 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i2.10260

Abstract

The control of flow separation phenomenon is a challenge that has attracted much attention from researchers in the context of heat and mass transfer. This phenomenon negatively affects heat transfer performance in thermal management applications. Flow control devices play a crucial role in minimizing the effects of flow separation. One of the fundamental geometries that supports understanding in flow separation control is the backward-facing step. Therefore, this study aims to investigate the utilization of bluff body shape variations, including cube, cylinder, and diamond shapes, as passive flow control devices on heat transfer performance in backward-facing step flow. The present study used a Computational Fluid Dynamics solver, followed by a variation of the Reynolds number, 50 ≤ Re ≤ 400. Computational results show that the bluff body significantly reduces the primary recirculation zone and compresses the thermal boundary layer, strengthening the temperature gradient and improving the heat transfer rate. The cube variation demonstrates the optimal thermal performance, exhibiting an augmentation in the average Nusselt number of up to 28.15% at Re = 400, resulting the highest overall Performance Evaluation Criterion.
Co-Authors Adi Winarta, Adi Akmal, Reza Najmi Aldi Anggara, Rizki Aldi Raditya Adriansyah Anggara, Rizki Aldi Anggie Wijaya Topan Anton Dwi Prabowo Armadani, Elvi Wijaya Bima Rakha Adhitama Bunga, Nely Toding Christian Jovie Yudhananta Deva Ihsan Khoirunas Deva Ihsan Khoirunas Dewantara, Annastya Bagas Elvi Armadani Elvi Wijaya Armadani Fathin Muhammad Madhudhu Fathin Muhammad Mardhudhu Fitri Wahyuni Fitri Wahyuni Fitri Wahyuni Fitri Wahyuni Fourlando, Rainer Samuel James Julian James Julian James Julian Junaedi, Thomas Lumbantoruan, Regina Natalindah Madhudhu, Fathin Muhammad Mahdhudhu, Fathin Muhammad Mokhammad Bahtiar Rivai Naufal, Ridwan Daris Nisa, Rasya Aulia Nathania Prabowo, Anton Dwi Raffi Indrajati Rainer Samuel Fourlando Ramadhani, Rifqi Rasya Aulia Nathania Nisa Rasya Aulia Nathania Nisa Reza Najmi Akmal Ridwan Daris Naufal Rifqi Ramadhani Rivai, Mokhammad Bahtiar Rizki Aldi Anggara Saphira Anggraita Siswanto Sedeq, Khalees Siswanto, Saphira Anggraita Situmorang, Riky Stepanus Toding Bunga, Nely Topan, Anggie Wijaya Ulhaq, Faiz Daffa