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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Inovisi Jurnal Akuntansi AKUNESA IPTEK The Journal for Technology and Science Jurnal Ilmiah Mahasiswa FEB Civil Engineering Journal Jurnal Pengabdian Masyarakat AbdiMas Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Warta Penelitian Perhubungan JRA: Jurnal Riset Akuntansi Jurnal Optimalisasi Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Jurnal Konversi Energi dan Manufaktur Jurnal Pengabdian Masyarakat Indonesia Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Transportasi Multimoda Makara Journal of Technology Jurnal Manajemen dan Pemasaran Jasa Riset Sains dan Teknologi Kelautan AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin Metris: Jurnal Sains dan Teknologi
Taufiqur Rachman
Fakultas Teknik, Universitas Esa Unggul
Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Journal : IPTEK The Journal for Technology and Science

 1 
A New Method for Modeling Bottom Shear Stress under Irregular Waves Taufiqur Rachman; Suntoyo Suntoyo
IPTEK The Journal for Technology and Science Vol 22, No 2 (2011)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v22i2.60

Abstract

The bottom shear stress estimation is the most important step to device an input to all the practical sediment transport models. In this paper, the modeling of bottom shear stress in a rough turbulent bottom boundary layer under irregular waves of experimental result is examined by a new calculation method of bottom shear stress based on incorporating velocity and acceleration terms simultaneously. A new acceleration coefficient is proposed to formulate the bottom shear stress under irregular waves. The new formula is further examined with a basic harmonic wave cycle modified with the phase difference and square of the instantaneous friction velocity incorporating the acceleration effect as proposed by the previous researchers. The new method gave the smallest the RMSE value indicating that the new method has the best agreement with the bottom shear stress of experimental results. Therefore, it can effectively be utilized in a beach evolution model by combining it with the irregular wave transformation model.
Numerical Modeling of Turbulent Bottom Boundary Layer over Rough Bed under Irregular Waves Taufiqur Rachman; Suntoyo Suntoyo; Kriyo Sambodho; Haryo Dwito Armono; Eko Yusroni
IPTEK The Journal for Technology and Science Vol 22, No 4 (2011)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v22i4.75

Abstract

A numerical model of turbulent bottom boundary layer over rough bed under irregular waves is reviewed. The turbulence model is based upon Shear Stress Transport (SST) k- model. The non-linear governing equations of the boundary layer for each turbulence models were solved by using a Crank-Nicolson type implicit finite-difference scheme. Typical the main velocity distribution, turbulence kinetic energy and time series of the bottom shear stress are presented. These results are shown to be in generally good agreement with experimental result. The roughness effects in the properties of turbulent bottom boundary layer for irregular waves are also presented with several values of the roughness parameter (am/ks) from am/ks=5 to am/ks=3122. The roughness effect tends to decrease the main velocity distribution and to increase the turbulent kinetic energy in the inner boundary layer, whereas in the outer boundary layer, the roughness alters the mean velocity distribution and the kinetic energy turbulent is relatively unaffected. The effect of bed roughness on the bottom shear stress under irregular waves is found that the higher roughness elements increase the magnitude of bottom shear stress along wave cycle. And further, the bottom shear stress under irregular waves is examined with the existing calculation method and the newly proposed method.
Co-Authors ., Ardi ., Ashury Achmad Yasir Baeda Adiputra, Ristiyanto Adnan, Septian Rahmat Alie, Muh. Zubair Andriadi, Andi M. Rezky Arafat, Andi Muhammad Alfian Arief Suwandi Arifki, Muhammad Alif Alim Arsyad Thaha, Muhammad Ashury - Ashury, Ashury Assidiq, Fuad Mahfud Awal, Muhammad Andika Samudera Ayu Novia Lestari, Putri Ayyub Ansyari B, Muhammad Bambang Soegijono Budhy Kurniawan Chairul Paotonan Cristofer Ewaldo Daeng Paroka Damayant, Riska Darmiolla Natasia Watunglawar dj, ashury Dundu, Denis Restuardi Eko Yusroni Emanuela Tasya Andini Faizin, Agus Fauzan, Dzaky Feby Z Octafani Firman Husain Firman Husain Fitriana Rezki Ganding Sitepu Habibi Palippui Haryo Dwito Armono Hasdinar Umar Idsan, Muhammad Akhsal Indah Puspita Sari, Indah Puspita Iphov Kumala Sriwana Irfaniyanti, Irfaniyanti Irma Handayani, Irma Istianto B Rahardja Jalil, Jalil Jesica Jepni D. A Jumadi Jumadi Juswan - Juswan . Juswan Sade Juswan, Juswan Kasba, Putri Sriwahyuni Kriyo Sambodho Kurniawan, Abdi M. Derajat Amperajaya M. Derajat Amperajaya Makmur, Irfan Maming, Muhammad Idhil Masri, Andi Muhammad Maulid Muhajirin Muhajirin Muhammad Fadly Muhammad Zubair M Alie Muhammad Zubair Muis Alie Muhammad Zubair Muis Alie, Muhammad Zubair Muhiddin, Amir H. Murdopo, Ragil Musfirah Cahya Fajrah Nabila Noor Izmi Nasir, Andi Mega Mustika Nisa, Mu’minatung Nofi Erni Nofi Erni Nofi Erni Nofi Erni Nur, Fitrahwati Pairunan, Teguh Pata’dungan, Geby Phady, Adriani Prasetyo, Adil Farhan Purnama, Bulan Rachmi, Nur Rahim, Fitri Ramadani Rahmat, Nabila Ainun Nur Ramasari, Dian Reskiyanti, Reskiyanti Restuardi Dundu, Denis RILLA GANTINO Rina Anindita Rizky, Zakinah Roesfiansjah Rasjidin Sabaruddin Rahman Safitri Safitri Savhanta Tonapa, Royh Septian Rahmat Adnan Septian Rahmat Adnan Septian Rahmat Adnan Shirly Wunas Sitti Hijraini Nur Soeratno, Soeratno Sriwana, Nur Mutia Suci, Indah Melati Suleman, Siti Arifaini Suleman, Yuliani Suriamiharja, Dadang A. Suyono Suyono Syaifullah, Muh Syamsuri, A. M. Timang, Novrian Yosua Ujang Juwardi Utama, Muhammad Furqan Lizak Widianingrum, Windi WPT, Ari Anggrani Yudha Pratama, Andi Zubair Muis Alie, Muhammad Zulfikar Zulfikar Zulfikar, Ananda Muhammad