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All Journal Dinamis Jurnal Polimesin
Irdam, Fortinov Akbar
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Automotive Engineering Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Numerical Study of Orifice Plate in Entrance and Fully-Developed Flow Region for Fluid Flow Measurement Irdam, Fortinov Akbar; Tanjung, Munir; Akhyan, Amnur
DINAMIS Vol. 13 No. 1 (2025): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v13i1.21558

Abstract

Having reliable data is important for analyzing the fluid behaviour inside the pipe. Hence, the selection of the fluid flow measurement instrument becomes critical to fulfill its objectives. Orifice plate, one of the pressure-based device is commonly used for its simplicity and ease of use. One of the phenomena that occurs during the flow measurement process using an orifice plate is the pressure drop between its upstream and downstream regions. Many researchers have brought this topic to find the best solution to reduce the pressure drop impacts to fluid flow for both experimental and numerical analysis. Understanding the pressure drop situation of the orifice plate in the entrance region and fully-developed flow region remains a relatively unanimous topic. A numerical study is conducted on this research to find the influence of the orifice plate’s thickness and the location of the installation of the orifice plate on the fluid flow to the pressure difference in the upstream and downstream sides of the orifice plate. The results show that the pressure drop at its highest will happen when a thicker orifice plate is chosen and it is located in the entrance region. This result will hopefully give better insight for orifice plate research in order to reduce pressure drop in fluid flow, which could ultimately increase the efficiency of the process of fluid flow inside the pipe. Future work can be expanded to study the orifice plate’s mechanical behaviour due to pressure from fluid flow.
Investigation of geometric effects on fluid viscosity using the falling ball method Akhyan, Amnur; Ma’a, Mustaza; Irdam, Fortinov Akbar; Alvarez, Alvin; Nugraha, Nurcahya; Nurkhamdi, Nurkhamdi
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7347

Abstract

The falling ball method, based on Stokes law, is a simple yet accurate technique for determining fluid viscosity, though its precision is influenced by factors such as wall, Reynolds, end, memory, and off-center effects. This study aims to determine the effect of spherical geometry on the fluid viscosity value represented by the sphericity factor . An experimental study was conducted to examine its accuracy of viscosity values to produce the correction factor. The sphericity factors studied were 0.993, 0.976, and 0.949. To reduce the uncertainty caused by the wall effect, the ratio db/Dt was 0.071, using a 5.8mm diameter plastic ball and SAE 40 oil fluid at 32.4°C. Terminal velocity (??) was obtained by analyzing the video of the ball falling in the fluid, which was displayed on the tracker software. The video was taken using a 1080p, 60 fps camera. Wall and Reynolds effect correction factors were used to amend experimental viscosity values. The result indicates the viscosity will be accurately determined by selecting a larger sphericity value of the ball during the experimental process. It will reduce the necessity of correction factors to obtain the value of fluid viscosity.
Co-Authors Akhyan, Amnur Alvarez, Alvin Ma’a, Mustaza Nugraha, Nurcahya Nurkhamdi, Nurkhamdi Tanjung, Munir