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All Journal Jurnal Teknik Mesin IPTEK Journal of Proceedings Series Warta Ardhia : Jurnal Perhubungan Udara Journal of Energy, Mechanical, Material and Manufacturing Engineering Electrices : Jurnal Otomasi Kelistrikan dan Energi Terbarukan JMES The International Journal of Mechanical Engineering and Sciences
Sutardi Sutardi
Department Of Mechanical Engineering, Institut Teknologi Sepuluh Nopember
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Journal : IPTEK Journal of Proceedings Series

 1 
Numerical Study of Characteristics of 3D Flow in Square Duct 90° Elbow with Diamond Bodied Disturbance Fernandes, Yogi Eka; Sutardi, Sutardi; Purnama, Randi
IPTEK Journal of Proceedings Series No 1 (2019): 4th International Seminar on Science and Technology 2018 (ISST 2018)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2019i1.5112

Abstract

The use of elbow in the fluid mechanics system produces a larger pressure drop. The purpose of this research is to know the flow characteristic through square channel with elbow 90. The diamond-shaped body disturbance is placed at 10° inside the elbow inlet. This research was conducted in 3D simulation with standard k-3 turbulence model. The cross-sectional area uses a square with a side size of 125 mm, then the hydraulic diameter (Dh) is 125 mm as well. The elbow curvature ratio (R / D) is set to 3. A body disorder with diagonal (l / D) ratio at 0.064, 0.08 and 0.1 is placed at 10° in the elbow inlet. The results in this study indicate that body disorders with diamond shape can delay the separation of flow and increase the intensity of turbulence flow. Finally, the results also show that the pressure drop is reduced
The Rate of Turbulent Kinetic Energy Dissipation in a Turbulent Boundary layer on a Flat Plate Sutardi Sutardi
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.322

Abstract

The rate of turbulent kinetic energy dissipation (e) is an important parameter in the turbulent flows, such as pipe flows, channel flows, atmospheric turbulence, ocean turbulence, and turbulent boundary layer flows. This study is concerning in the evaluation of the rate of turbulent kinetic energy dissipation in turbulent boundary layers developing on a flat plate. In this study, e is obtained simply from the calculation using Taylor’s frozen hypothesis. The study is performed experimentally using a low speed wind tunnel with a squared test section of 91 x 91 x 540 cm. The maximum attainable freestream velocity is approximately of 15 m/s with freestream turbulence intensity is less than 0.5%. Instantaneous fluid velocity is measured using a hot-wire anemometry system connected to a data acqusition and a personal computer. The experiments are performed at freestream velocities of 2.0 m/sec and 5.5 m/sec corresponding with momentum thickness Reynolds numbers (Rq) of approximately 1000 and 3000, respectively. The results show that maximum value of e is at approximately 1 < y+ < 10 at both Reynolds numbers. The results of e in the smooth-wall flat plate boundary layer are compared to that in the boundary layer on the flat plate modified with a square groove. There is a slight difference between e in the smooth-wall flat plate boundary layer and that in the boundary layer on the flat plate with a square groove.
Co-Authors ., Sadili Ahmad Anis Bambang Juni Pitoyo Bambang Juni Pitoyo Djatmiko Ichsani Ekadewi Anggraini Handoyo Fauzi Perdana Fernandes, Yogi Eka Kania Amelia Safitri Nadhiroh, Nuha Prabowo . Purnama, Randi Salfin Wijaya, Andres Setyo Hariyadi Wawan Aries Widodo