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All Journal Semesta Teknika JURNAL SIMETRIK Gorontalo Journal of Infrastructure and Science Engineering Abdi Wiralodra : Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian kepada Masyarakat Nusantara Journal of Vocational Education and Automotive Technology METAL : Jurnal Sistem Mekanik dan Termal Journal of Novel Engineering Science and Technology Jurnal Teknik Sipil dan Arsitektur
Rauf, Wawan
Fakultas Teknik Universitas Gorontalo
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Kajian Komputasi Pengaruh Penerapan Blowing pada Bagian Belakang Model Kendaraan Rustan Tarakka; Nasaruddin Salam; Andi Amijoyo Mochtar; Muhammad Ihsan; Wawan Rauf
Semesta Teknika Vol 25, No 1 (2022): MEI 2022
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v25i1.13478

Abstract

Drag aerodinamika pada kendaraan disebabkan adanya tekanan rendah dan separasi aliran di bagian belakang, yang berdampak pada menurunnya kecepatan, meningkatnya penggunaan bahan bakar, dan turunnya efisiensi kendaraan. Blowing merupakan salah satu pilihan rekayasa kendali aktif aliran yang dapat diterapkan pada desain kendaraan yang dapat mengendalikan pembentukan separasi aliran dan berefek positif berupa pengurangan hambatan aerodinamis. Penelitian ini bertujuan menganalisis pengaruh penerapan blowing terhadap pola aliran, distribusi tekanan, dan hambatan aerodinamika yang bekerja pada bagian belakang model. Dengan bantuan CFD Fluent 6.3, model uji yang digunakan adalah model kendaraan dengan sudut kemiringan geometri depan (α) 35o dan rasio terhadap model Ahmed bodi original adalah 0.17 (1:6), yang dilengkapi dengan blowing dengan kecepatan 1.0 m/s. Hasil komputasi mengindikasikan bahwa penerapan blowing dapat mengurangi pembentukan wake dan menunda separasi aliran dan dapat meningkatkan koefisien tekanan minimum pada bagian belakang model kendaraan sebesar 24.690%. Pengurangan hambatan aerodinamika diperoleh sebesar 9.583%.
Kajian Aerodinamika Pada Model Kendaraan dengan Penerapan Kontrol Aktif Suction Rustan Tarakka; Nasaruddin Salam; Jalaluddin Jalaluddin; Wawan Rauf; Muhammad Ihsan
METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 1 (2021): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (673.3 KB) | DOI: 10.25077/metal.5.1.38-43.2021

Abstract

As the air flow reaches the rear part of the vehicle the flow will undergo separation generated by friction and fluid viscosity, and creating wake, considerably large turbulent area with low pressure at the rear of the vehicle which results in pressure drag which can reduce vehicle performance. The research was carried out with a computational and experimental approach. The test model used in this study is a model of a family van model which is a modification of the Ahmed body model. The rear part of the vehicle model is equipped with an active control feature in the form of a suction with a slant angle (α) of 35°. The upstream speed and suction speed are 11.1 m/s and 0.5 m/s, respectively. The results obtained indicate that the application of active suction control is able to reduce wake formation and delay flow separation compared to the uncontrolled model, and is able to increase the minimum pressure coefficient on the rear wall of the vehicle model with an increase of 41.49%, and is able to reduce the drag coefficient by 11.0260% for the approach. computation and 11.0080% for the experimental approach.
Analisis Penggunaan Bahan Bakar Etanol-Pertalite Pada Motor Honda Scoopy 110 cc Mohamad Rifal; Wawan Rauf
Gorontalo Journal of Infrastructure and Science Engineering Vol 1, No 1 (2018): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.138 KB) | DOI: 10.32662/gojise.v1i1.141

Abstract

The production of the crude oil in Indonesia is slowly deceasing by the year, while the consumption of the fuel is still increasing. The matter being comparable within its consumtion is that it makes Indonesia keep impoerting the fuel in order to fulfill its need in every year. It is because there is no new invention of the new oil-mill. Thus, a new penetration to provide an alternative fuel to press the consumption level is needed. Ethanol however, is one of the newest alternative fuels which can be used as the additional substance of the use of the fossil fuel. Ethanol contains of up to 35% oxygen so that it will produce the perfect combustion even if it is in small unit of substance. The aim of this research was to find out the effect of the use of the mixture of the ethanol-pertalite toward the fuel combustion. The research was using the Honda Scoopy 110 cc motorcycle with 1 cylinder injection system. The liquid tank is designed by using plastic container so that it will be possible to be detached and paired to make the consumtion measuring easier. The test vehicle was operated above chasis dynamometer. Engine scanner, especially for Honda was used to sett the rpm, finding out the throotle position, ignition timing, oxygen sensor and the ratio of water fuel. The result of the research was showing that the use of the mixture fuel E-40 is the best mixture, in which E-40 usage is 14,3% more frugal rather that the combustion of the pure pertalite.
Pelatihan Building Information Modeling (BIM) Bagi Pelaku Usaha Jasa Konstruksi Di Gorontalo Rifaldo Pido; Yohanes P. Erick A; Fendy Faizal Gobel; Wawan Rauf; Mohamad Rifal; Rahmad Hidayat Boli; Sahional Ishak; Novriyanti Talango; Rahman Abdul Djau; Sartan Nento; Eko Adityawan Tumenggung Zees; Nurhayati Doda
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 4 No. 1 (2023): Jurnal Pengabdian kepada Masyarakat Nusantara (JPkMN)
Publisher : Cv. Utility Project Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1010.374 KB)

Abstract

Perkembangan teknologi saat ini telah berkembang pesat, dimana perkembangannya sangat bermanfaat yang tidak terhingga bagi kehidupan manusia. Perkembangan teknologi tersebut telah mencakup di segala bidang aspek kehidupan siswa. Ilmu Pengetahuan dan Teknologi (IPTEK) merupakan salah satu perkembangan yang sangat pesat, di mana era ini membawa iklim yang semakin terbuka untuk saling bekerja sama dan saling melengkapi. Di sisi lain, era ini juga membawa persaingan yang sangat kompetitif. Proses Perancangan bangunan pada sebuah infrastruktur di Indonesia menggunakan beberapa metode, seperti metode berbasis konvensional dan metode berbasis Building Information Modelling (BIM). Kegiatan ini dilakukan selama 5 hari, yaitu pada tanggal 26 – 30 September 2022. Lokasi kegiatan di Auditorium Universitas Gorontalo. Peserta kegiatan sosialisasi Building Information Modelling (BIM) berasal dari perwakilan konsultan, alumni dan mahasiswa. Kegiatan Pengabdian kepada Masyarakat telah dilakukan oleh tim pengabdian dari Fakultas Teknik dalam bentuk sosialisasi dan pelatihan Building Information Modelling dengan Tekla Structures di Auditorium Universitas Gorontalo, yang dihadiri oleh 50 peserta. kegiatan ini telah memberikan pengenalan tentang Building Information Modelling (BIM) dan memberikan keterampilan dasar dalam penggunaan aplikasi teknologi BIM khususnya menggunakan aplikasi Tekla Structures
Sosialisasi Penggunaan Anggaran Dana Desa Untuk Meningkatkan Pembangunan Infrastruktur Desa Molowahu Andi Sahrul Hidayat; Rahman A Djau; Fendi Faisal Gobel; Novriyanti Talango; Wawan Rauf; Mifidyah Putri Palilati; Mohamad Mirza Saleh
Abdi Wiralodra : Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2023): Abdi Wiralodra
Publisher : universitas wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/abdi.v5i2.123

Abstract

Pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman dan kesadaran warga terkait penggunaan anggaran dana desa dalam pembangunan infrastruktur desa. Penelitian ini mengidentifikasi sejumlah masalah yang dihadapi oleh masyarakat terkait pengelolaan dana desa, antara lain kurangnya pengetahuan warga terkait mekanisme penggunaan dana desa, arogansi Kepala Desa, ketidaksesuaian Rencana Anggaran Belanja (RAB) dengan pelaksanaan, ketidaksesuaian pekerjaan dengan spesifikasi yang telah ditetapkan, tidak adanya nota pembelian bahan, manipulasi nota, item pekerjaan yang tidak dikerjakan, pekerjaan yang tidak selesai, pekerjaan yang tidak dapat digunakan, aliran keuangan yang tidak jelas, penggunaan alat berat yang berlebihan, dan perubahan pekerjaan yang tidak jelas. Berdasarkan permasalahan tersebut di peroleh solusi antara lain pekerjaan yang akan dikerjakan harus berdasarkan permusyawaran dan permufakatan, penjelasan teknis pekerjaan, keterlibatan ruang lebih fasilitator teknis, keterlibatan tenaga teknis yang memahami RAB dalam pelaksanaan pekerjaan, laporan teknis, serta pengawasan dan Monitoring
Analisis Sebaran Sedimen Tersuspensi Di Danau Limboto Menggunakan Pengindraan Jauh Wawan Rauf; Nasir Bumulo; Ilyas Ichsan; Mohamad Alfandi Hippy
SIPILART (Jurnal Teknik Sipil dan Arsitektur) Vol. 1 No. 2 (2025): September 2025
Publisher : CV. Indie Press Edutaste

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kondisi danau limboto kini sangat memprihatinkan karena mengalami proses penyusutan dan pendangkalan akibat sedimentasi yang mengancam keberadaannya di masa yang akan datang. Semakin berkurangnya luasan perairan danau menyebabkan semakin menurunnya fungsi danau sebagai kawasan penampungan air sehingga berpotensi mengakibatkan banjir dan kekeringan di sekitar wilayah kawasan bahkan di luar daerah kawasan danau limboto. tingginya kadar sedimen dapat mempercepat hilangnya habitat alami bagi berbagai spesies ikan dan organisme lainnya, serta mengurangi keanekaragaman hayati di danau. Penginderaan jauh menawarkan pendekatan yang efektif untuk memantau dinamika sedimentasi di Danau Limboto. Dengan menggunakan citra satelit, peneliti dapat memperoleh data spasial yang luas mengenai sebaran sedimen tersuspensi secara akurat. Penelitian ini bertujuan untuk menganalisis sebaran sedimen tersuspensi di danau limboto menggunakan pengindraan jauh. Pengolahan data citra satelit Sentinel-2 pada software SNAP ESA menggunakan persamaan Laili 2016, untuk mendapatkan kondisi persebaran TSS dan nilai TSS di Danau Limboto. Metode analisa yang digunakan adalah analisa deskriptif untuk menggambarkan nilai TSS yang didapatakan dari pengolahan data-data yang ada. Hasil penelitian menunjukan konsentrasi sedimen tersuspensi (TSS) di danau limboto variasi yang signifikan baik secara spasial maupun temporal sepanjang tahun 2024, dengan nilai tertinggi terjadi pada bulan Desember (17,53–30,12 mg/L) dan terendah pada bulan Agustus (5,61–15,48 mg/L).
Studi Perencanaan Peningkatan Jalan Pada Ruas Jl. Jenderal Soedirman-Jl. R.S. Pontoh Di Kabupaten Bolaang Mongondow Utara Febrianto Harundja; Nurhayati Doda; Ilyas Ichsan; Wawan Rauf
SIPILART (Jurnal Teknik Sipil dan Arsitektur) Vol. 2 No. 1 (2026): Maret 2026
Publisher : CV. Indie Press Edutaste

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.66865/9m8aj465

Abstract

Peningkatan kualitas infrastruktur jalan menjadi salah satu upaya strategis dalam menunjang mobilitas masyarakat dan distribusi barang serta jasa, khususnya di wilayah yang memiliki pertumbuhan lalu lintas signifikan. Skripsi ini bertujuan untuk menganalisis kelayakan perencanaan peningkatan jalan pada ruas Jl. Jenderal Soedirman–Jl. R.S. Pontoh di Kabupaten Bolaang Mongondow Utara, dengan proyeksi pelayanan hingga 20 tahun mendatang. Metodologi penelitian mencakup survei lalu lintas selama 24 jam, pengukuran geometrik jalan menggunakan total station, serta pengujian kekuatan tanah dengan metode DCP (Dynamic Cone Penetrometer) untuk mendapatkan nilai CBR. Analisis dilakukan berdasarkan Manual Kapasitas Jalan Indonesia (MKJI 1997), Pedoman Desain Geometrik Jalan (2021), dan Manual Desain Perkerasan Jalan (MDPJ 2017 Revisi 2). Hasil studi menunjukkan bahwa kapasitas eksisting ruas jalan tidak memadai untuk mengakomodasi volume lalu lintas masa depan, dengan nilai derajat kejenuhan melebihi ambang batas 0,75. Oleh karena itu, diperlukan peningkatan kapasitas dan perkerasan jalan, termasuk pelebaran lajur dan perbaikan geometrik tikungan, agar pelayanan lalu lintas dapat tetap optimal dan aman bagi pengguna jalan. Penelitian ini memberikan rekomendasi teknis untuk pengambilan kebijakan pembangunan infrastruktur yang berkelanjutan di wilayah tersebut.  
PENGARUH JENIS ELEKTRODA PENGELASAN SMAW TERHADAP KEKUATAN LAS BAJA KARBON RENDAH Nurmala Shanti Dera; Idris Sahidu; Sahionl Ishak; Novriyanti Talango; Wawan Rauf
Journal of Vocational Education and Automotive Technology Vol 7 No 2 (2025): Journal of Vocational Education and Automotive Technology
Publisher : Ivet University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joveat.v7i2.4321

Abstract

Low carbon steel such as ST 37 is widely used in manufacturing and construction industries due to its ease of fabrication and cost-effectiveness. However, one of its main drawbacks is its relatively low hardness and wear resistance, especially after welding processes. The Shielded Metal Arc Welding (SMAW) method is highly influenced by the type of electrode used, which significantly affects the mechanical properties of the weld joint. This study aims to investigate the effect of electrode variation (E6010, E6013, and E7018) on the mechanical properties of ST 37 low carbon steel after undergoing thermochemical treatment using the pack carburizing method. An experimental quantitative approach was used in this research. ST 37 steel samples were welded using three different types of electrodes, followed by pack carburizing at 950°C for two hours using coconut shell charcoal as the carbon source, and then quenched in oil. Mechanical properties were evaluated through tensile and hardness tests, including calculations of strain and elastic modulus. The results showed that the E6010 electrode provided the best performance, with the highest average tensile strength of 25.835 MPa and the highest strain value of 0.2667, indicating strong and ductile weld joints. In contrast, the E7018 electrode yielded the highest elastic modulus at 104.363 MPa, reflecting a stiffer but less ductile material. These findings confirm that electrode selection plays a critical role in determining the mechanical behavior of welds, particularly when combined with surface hardening treatments like pack carburizing. This study contributes to scientific understanding and offers practical recommendations for improving weld quality in both industrial and academic contexts.
Optimizing Pelton Turbine Efficiency through Variable Flow Rates: An Experimental Study Rahmad Hidayat Boli; Rifaldo Pido; Wawan Rauf
Journal of Novel Engineering Science and Technology Vol. 5 No. 02 (2026): In Press - Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i02.1791

Abstract

This study experimentally investigates the efficiency characteristics of a laboratory-scale Pelton turbine under variable water flow rates and mechanical loading conditions. Five flow rates (0.04 m³/s, 0.035 m³/s, 0.029 m³/s, 0.024 m³/s, and 0.021 m³/s) were tested by measuring rotational speed, torque, shaft power, and turbine efficiency. The results reveal a nonlinear relationship between load and efficiency for all tested flow rates, with maximum efficiency occurring at intermediate loading conditions. The highest efficiency of 52.727% was obtained at a flow rate of 0.04 m³/s and a load of 12 kg. Were associated with reduced efficiency, which is commonly linked to decreased jet momentum. These findings provide experimental insight into Pelton turbine performance under non-design operating conditions at laboratory scale.
ANALISIS JARI JARI DAN KEMIRINGAN JALAN TERHADAP KECEPATAN KENDARAAN Nasir Bumulo; Wawan Rauf
JURNAL SIMETRIK Vol 16 No 1 (2026): Jurnal Simetrik (Sipil, Mesin, Listrik)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v16i1.3870

Abstract

Road geometric conditions are one of the key factors influencing the safety and comfort of road users. Inappropriate geometric elements, particularly on horizontal curves, can increase the risk of traffic accidents. This study aims to evaluate the suitability of curve radius and cross slope (superelevation) in relation to vehicle speed on the Trans Sulawesi Road section located in Bakti Village, Pulubala District, Gorontalo Regency. The research employed field surveys and geometric calculation analysis based on the 2021 Guidelines for Intercity Road Geometric Design. The collected data included curve radius, curve angle, superelevation, and the average vehicle speed at six curve segments selected as the research objects. The analysis results indicate that among the six evaluated curves, only one curve with a radius of 109 m satisfies the recommended safety criteria. The remaining five curves have relatively small radii, which may potentially increase the risk of traffic accidents. In addition, one curve was found to have a superelevation value of 8.71%, exceeding the recommended maximum limit of 8%. These findings indicate that several geometric elements of the road segment do not fully comply with the established geometric design standards. Therefore, improvements in road safety are required through geometric design adjustments and the installation of warning signs to enhance the safety and comfort of road users. Keyword: Curve Radius, Road Geometry, Superelevation, Vehicle Speed
Co-Authors Doda, Nurhayati Eko Adityawan Tumenggung Zees Febrianto Harundja Fendi Faisal Gobel Fendy Faizal Gobel Hidayat, Andi Sahrul Ichsan, Ilyas Idris Sahidu Jalaluddin Jalaluddin Mifidyah Putri Palilati Mochtar, Andi Amijoyo Mohamad Alfandi Hippy Mohamad Mirza Saleh Mohamad Rifal Muhammad Ihsan Nasaruddin Salam nasir bumulo Novriyanti Talango Novriyanti Talango Nurmala Shanti Dera Rahmad Hidayat Boli Rahman A Djau Rahman A. Djau Rifaldo Pido Rustan Tarakka Sahional Ishak Sahionl Ishak Sartan Nento Yohanes P. Erick. A