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Journal : Jurnal Polimesin

Study of hydrodynamic characteristics in oscillating wave surge converter julian, james; Anggara, Rizki Aldi; Naufal, Ridwan Daris; Ramadhani, Rifqi; Prasetyo, Eko Andi; Wahyuni, Fitri; Gunasti, Nabilah Dwi
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4715

Abstract

In the realm of renewable energy, researchers worldwide have been paying close attention to developing the Oscillating Wave Surge Converter (OWSC) device. This device has the potential to harness the power of ocean waves and convert it into a reliable source of clean energy. Hydrodynamic characteristics are essential parameters in developing OWSC devices. Therefore, this research conducted a hydrodynamic study on the OWSC device with variations in ocean wave periods, including T= 1.5, 1.7, 1.9, 2.1, and 2.3. The Boundary Element Method (BEM) describes the interaction between sea waves and floating body structures. This method assumes incompressible, inviscid, and irrotational flow. A numerical approach is used as a calculation method followed by verification and validation to support the level of actualization. The research results showed that the incident wave caused the OWSC device to experience a deviation from its equilibrium position in the form of an oscillating flap inclination angle as a form of hydrodynamic characteristics. The sea wave period correlatedwith the rate of change in flap position over time, including the maximum deviation in the flap angle. As a power plant, the performance of the OWSC device can work at reasonably short-wave period intervals based on the device's ability to produce mechanical power. The highest average mechanical power was achieved in the T= 1.5 period of 34.49 Watts with an efficiency of up to 52.43%. The OWSC device requires a high intensity of wave energy in a short duration to generate optimal mechanical power. It is important to note that optimal mechanical power generation is crucial for the OWSC device to function effectively. Therefore, the device should be placed in a location where the wave energy intensity is consistently high.
Numerical Study On Characteristics Of The Backward-Facing Step Flow With Variations Of The Slope Angle Of The Step julian, james; Anggara, Rizki Aldi; Wahyuni, Fitri
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4052

Abstract

The phenomenon of flow separation plays a vital role in the industrial world. The backward-facing step (BFS) is a general form representing flow separation. This study investigates the influence of the slope angle of the step on BFS flow characteristics at various low Reynolds numbers. According to the CFD results, the flow separation phenomenon forms a circulation zone for each increase in Reynolds numbers. This phenomenon is a result of the sudden expansion of the channel geometry. The BFS with the slope angle of the step demonstrates that the increase in the recirculation zone can be minimized, thus appropriately delaying flow separation. The recirculation zone causes fluid flow to reverse direction, affecting fluid flow efficiency due to resulting pressure differences. Therefore, a BFS with the slope angle of the step exhibits a more efficient flow phenomenon by minimizing the recirculation zone.
Co-Authors AA Sudharmawan, AA Abadi, Dinda Putri Acehan, T. Raden Achmad Zuchriadi Adi Winarta, Adi Afriyanti, Nessy Agus Wartiningsih Agustina, Nurhaliza Ahdim, Hendy Surya Ahsan Ahsan Akil, Rahmah Akkas, Rusmaini Akmal, Reza Najmi Alamsyah, Muh. Nur Aldi Anggara, Rizki amalia, apriliani Anas, Andi Iqram Andi Rahmaniar Andi Sagita, Andi Anggara, Rizki Aldi Anjarie Dharmastuti Anton Prabowo Apriliyanti , Fressi Arbin Janu Setiyowati, Arbin Ardia Putra Arel, Afdhil Arianti, Alivia Eka Arilla Ainda Ubak Arista Kiswantoro, Arista Armadani, Elvi Arnelia, Dela Arpris Pangestu, Arya Arrayya, Rodrigo Aryana, Risma As’ari, Muhammad Agung Asfahani, Asfahani Asneliwarni, Asneliwarni Atikasari, Tiara Cahya Awani, Andi Tenri Ayu, Riana Kesuma Azizah, Suci Midsayhri Azmi, M. Rizqi Bagas Dewantara, Annastya Bambang Budi Wiyono Billad, Rayhan Fariansyah Budhi Martana Budiyantoro, Cahyo Bustami, Alex Wissalam Choiruna, Hasby Pri D. M. Taher, D. M. Darmiwati Darmiwati, Darmiwati Daud Department, administratio Desnita, Eka Dewantara, Annastya Bagas Dian Miranda Dina Amaluis Diningsih, Suci Marta Diniyah, Usrotun Dwiyana, Artiyan Dzikrulloh, Mohammad Hilfi Azra Eddy Noviana Edi Saputra, Ahmad Efik Yusdiansyah Eliyasni, Rifda Elsa Marsellinda Elvi Roza Syofyan Fachrurahman, Indra Fahrudin Fahrudin Fahrudin, Fahrudin Fahrudin Faizin, Rudi Faizza, Amalia Nur Farha, Auditya Farida, Miftahul Fatih, Amri Fauzi, Ade Fikri Ferdyanto, Ferdyanto Fita Kurniasari Fitri, Sri Fuaddah, Dannur Garendi, Aisyah Vitariani Gudnanto Gunasti, Nabilah Dwi Hamzah, Muhammad Fakhri Hanafi, Husni Hapidzha, Putty Harahap, Yudani Alamsyah Hardiman, Mochamad Yana Hariati, Niken Widyastuti Harits, Iasha Brillianti Hartati, Herni Haryani, Ninik Hatijah Hatijah HENDRA GUNAWAN B11211055 Hendra, Joni Hermawan, Salsabila Yuli Adys Hermiza Mardesci Hetti Rahmawati Hidayatullah, Hengki Tri Hutasuhut, Ida Juliana Ibrahim, Rusli Imanuel Hitipeuw Intang, Siti Nur Intang, St Nur Irawan, Aris Irawan, Nurul Afifah Ishaq Ishaq Iskandar, Waridho Isril " James Julian Jamri, Jamri Jati, Revina Sedyaning Junaedi, Thomas Junaidi Junaidi Kartika, Rachmah Nanda Kesuma Ayu, Riana Komariah, Nur Krisnawati, Nova Kurniawan, Jhoni Kurniawan, Nanda Alfan Laloan, Nelviana Nelce Lazim N, Lazim N Lestari, Eva Dewi Lismaini, Lismaini Lumbantoruan, Regina Lumbantoruan, Regina Natalindah Lutfi Fauzan M. Ramli M. Ramli Mahdawanci, Yesi Mahdhudhu, Fathin Muhammad Maidelwita, Yani Malta Nelisa Mardhiah, Siti Martina Martina Martono Martono Masarohmat, Masarohmat Masithah, St Masithah, St. Masithah, St. Masithah Masniladevi, Masniladevi Meiliyana Meiliyana Melliza, Nur mentari, chintia indah Merwanta, Selvi Moch. Syihabudin Nuha Moh Masduki, Moh Moh. Hazim Ahrori Moh. Sholeh, Moh. Mufidah, Elia Firda Muflihatusyawal, Edfitri Muhammad Nur Muhammad Ramli Muhsin Muhsin Mulyana Saputri, Rahayu Muneng, Nadya Lutfiya Nadia Nadia Najib, Ariz Namira, Zahra Berlian Nandy Putra Nasrah Yusuf, Yusriah Naufal, Ridwan Daris Nawawi, Erfan Nisa, Rasya Aulia Nathania Nisa, Raysa Noor Diani Nora Yuniar Setyaputri Novyar Satriawan Fikri, KMS Nuha, Moch. Syihabudin Nur Hidayah Nurcahyani, Icha Dian Nurhasanah Nurhasanah NURMA, TIA Nursalam Nursalam Nurul Fadhilah Oktaviani, Eva Oktavitasari, Dini Orsinil, Warneri Paputungan, Cendra Perdina, Siska Prabowo, Anton Dwi Prasetyo, Eko Andi Pravesti, Cindy Asli Pravesti, Cindy Asli Purba, Riki Hendra Puspasari, Dwi Putra, Fathur Andyka Putri Rahmadani, Putri Putri, Sheila Putri, Suci Nora Julina Putriana, Nanda Rachmat Hargono Rafli, Muhammad Rahayu, Ririn Ami Rahmaniar MB, Andi Rahmaniar, Andi Rahmaniar Rahmatika, Ika Rahmawati Rahmawati Rahmayani, Mentari Tri Indah Ramadhani, Rifqi Ramli Rasyid, Yulianti Rate, Suherman Reda Rizal Reidana, Linka Latifany Falasifa Rellam, Silpa Reni, Ises Restu Dwi Ariyanto, Restu Dwi Rindiani, Wahyu A Rini Irianti Sundary Rini Rahmayanti Rizki Anggara, Rizki Rizky Mustikasari, Bella Rosmawati Rosmawati Rum Rosyid Sabila, Aliza Nur SAKINAH, PUTRI Salsabila Rahmah, Khalda Samsudin Samsudin Santi Widiasari, Santi Santika Sari Saputra, Noverdo Sari, Rena Sarumaha, Rahmat Syarief Satria, Muhammad Fari Sedeq, Khalees Selvia Selvia Sembiring, Rinawati Setiawan, Deri Setiawan, Dimas Adi Sigit Wibowo Silvia Rahayu, Ajeng Siswanto, Alen Siti Aminah Siti Uswatun Hasanah Soraya Soraya St. Masithah, St. Masithah St.Masithah, St.Masithah Suganda, Andrian Suherman, Suherman Sukamta Sukamta Suminarni, Nanik Suriyah, Suriyah Suryani, Nilma Syafruddin Syafruddin Syafruddin, H Syahrizal, MHD Syaiful Amri Syamsul, Musdalifah Syariffuddin Syariffuddin Syariffuddin, Syariffuddin Tamrin Fathoni Taneo, Mario Martin Taufik, Andi Darma Toding Bunga, Nely Tompo, Muh. Nur Alamsyah Tri Umari, Tri Tua, Lomo Mula Ulhaq, Faiz Daffa Vera Devani Vivina Eprillison Wandi, Wandi Wida Ningsih Widyasmoro, Widyasmoro Yahdian Rasyadi Yoyok Bekti Prasetyo Yoza, Prima Yuliana, Sekar Yuliarti, Ista Yuni Astuti Yuniar Lestari Yunita, Mila Yurisman Yusuf, Kurnia Zaman, Akhmad Nidhomuz Zudana, Kirana Zulkifli Ahmad