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Journal : Journal of Applied Sciences and Advanced Technology

Study of Fluid Flow Characteristics In A 90° Pipe Bend With Varying Guide Vane Length Julian, James; Purba, Riki Hendra; Sedeq, Khalees; Wahyuni, Fitri; Junaedi, Thomas
Journal of Applied Sciences and Advanced Technology Vol. 6 No. 3 (2024): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.3.99-108

Abstract

The influence of guide vane length and Reynolds number was investigated using computational fluid dynamics methods. By using a structured mesh, it is known that the three mesh variations used have been verified using the Richardson Extrapolation method. The validation process also showed quite good results. From this research, it can be seen from the velocity profile trend, which is close to the experimental results from previous studies. Changing the Reynolds number does not significantly change the velocity profile at the outlet bend. However, it can be seen that changes in the Reynolds number impact the fluid flow pattern produced around the pipe bend. It can be seen clearly, especially when the velocity is negative. Changing the length of the guide vane changes the flow pattern quite significantly. It is known that the shorter the guide vane used, the velocity profile will tend towards the outer core. Furthermore, using a guide vane increases the velocity profile at the position -0.3≤r/R≤ -0.06. Using a guide vane has proven to eliminate negative velocity areas on the inner core side of each variation.
Microbubble Measurements using Image Processing with the YOLOv8 Comparison Model Julian, James; Ulhaq, Faiz Daffa; Dewantara, Annastya Bagas; Purba, Riki Hendra; Wahyuni, Fitri; Junaedi, Thomas
Journal of Applied Sciences and Advanced Technology Vol. 6 No. 3 (2024): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.3.109-116

Abstract

Gas-liquid two-phase is a situation where the gas phase of a liquid coexists together. The presence of gas that forms a region in the liquid environment causes the formation of bubble flow. The parameters of the bubble flow carry important information about the behavior and characteristics of the bubble. This research was carried out by detecting the size and area of the bubble using YOLOv8-based image processing by comparing the model's performance to produce improvements in inference time, increase accuracy, and reduce computational load. Bubble images were collected by adding 0.4 mm copper wire as a comparison to convert mm to pixels; then, the images were labeled and trained with various YOLOv8 models. Confusion matrix, precision and recall are used as comparative evaluation materials for the YOLOv8 model to obtain good model performance. In this study, the AUC of the Precision and Recall curve closest to the value 1 is the YOLOv8m model of 0.990. The comparison results of the matrix evaluation with the best model are the YOLOv8m model with mAP of 99.00% and F1-score of 96.86%. Microbubble measurements are calculated from the output of the YOLOv8 model by converting pixel units to mm. The model used in bubble measurements is the model with the best evaluation results and the model that gets the smallest radius value by considering measurement uncertainty, namely YOLOv8m with a minimum radius of 0.66 ± 0.04 mm..
Co-Authors AA Sudharmawan, AA Acehan, T. Raden Achmad Zuchriadi Adhitama, Bima Rakha Adi Atmoko Adi Winarta, Adi Afriyanti, Nessy Agus Wartiningsih Agustina, Nurhaliza AGUSTINA, WAHYUNI Ahdim, Hendy Surya Ahsan Ahsan Akil, Rahmah Akkas, Rusmaini Akmal, Reza Najmi Alamsyah, Muh. Nur Aldi Anggara, Rizki Alfikriah, Syahira amalia, apriliani Amrul Amrul 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 Wijaya 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 Bela Negara, Adinda 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 Dinda Putri Abadi Diningsih, Suci Marta Diniyah, Usrotun Dwiyana, Artiyan Dzikrulloh, Mohammad Hilfi Azra Eddy Noviana Edi Saputra, Ahmad Efik Yusdiansyah Eliyasni, Rifda Elsa Marsellinda Elvi Armadani Elvi Roza Syofyan Elvionita, Cindy 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 Fourlando, Rainer Samuel Fuaddah, Dannur Garendi, Aisyah Vitariani Gudnanto Gunasti, Nabilah Dwi Hamzah, Muhammad Fakhri Hanafi, Husni Hapidzha, Putty Happy Yulia 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 Hikmah, Muh. Syawal 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 Julian, James James 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 Madhudhu, Fathin Muhammad 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 Miko Wahyono, Tri Yunis 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 Munirah Munirah 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 Nurlina Nurlina NURMA, TIA Nursalam Nursalam Nurul Fadhilah Oktaviani, Eva Oktavitasari, Dini Orsinil, Warneri Paputungan, Cendra Perdina, Siska Pharmaheri, Anugrah Putra Prabawa, Abi Fa’izzarahman Prabawa, Abi Izzatur 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 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 Rivai, Mokhammad Bahtiar Rizki Anggara, Rizki Rizky Mustikasari, Bella Rohmah, Ratna Afiah Awwalu 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 Siswanto, Saphira Anggraita Siti Aminah Siti Rahmah 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 Tamrin Fathoni Taneo, Mario Martin Taufik, Andi Darma Toding Bunga, Nely Tompo, Muh. Nur Alamsyah Topan, Anggie Wijaya 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 Yulianti Rasyid Yuliarti, Ista Yuni Astuti Yuniar Lestari Yunita, Mila Yurisman Yusuf, Kurnia Zaman, Akhmad Nidhomuz Zudana, Kirana Zulkifli Ahmad