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All Journal Transmisi Abdi Dosen : Jurnal Pengabdian Pada Masyarakat G-Tech : Jurnal Teknologi Terapan Advance Sustainable Science, Engineering and Technology (ASSET)
Enos Tambing
Universitas Cenderawasih
Religion Humanities Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Public Health Social Sciences

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Uncertainty-Quantified Grid-Convergence Analysis of RANS Turbulence Models for 2-D Incompressible Backward-Facing Step Flow in OpenFOAM Kaiway, Mickael Ruben; Joni; Giai, Agustinus; Siregar, Samuel Parlindungan; Tambing, Enos; Pius, Obia
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2390

Abstract

A concise evaluation of Reynolds-Averaged Navier–Stokes (RANS) turbulence modeling for two-dimensional, incompressible, steady backward-facing step (BFS) flow at Re = 1000–3000 was conducted using OpenFOAM’s SimpleFoam solver with the standard k–ε model. A tri-level mesh enhancement (coarse, medium and fine) was implemented, and ambiguity was measured utilizing the Convergence Ratio (CR) and Grid Convergence Index (GCI). The fine grid (CR = 0.54; GCI = 0.0059%) was the only configuration exhibiting monotonic convergence, ensuring valid GCI estimation. Results showed reattachment length increasing from 0.11 m to 0.12 m, with stronger vortical structures and steeper shear gradients at higher Re. This study uniquely integrates RANS model validation with grid-uncertainty quantification, providing guidance for mesh optimization and reliable turbulence modeling in BFS simulations.
SOCIALIZATION OF THE APPLICATION OF WASP NEST BRIQUETTE TECHNOLOGY FROM LOCAL SAGO WASTE IN YAKONDE VILLAGE, WAIBU DISTRICT, JAYAPURA REGENCY Agustinus Agustinus; Pither Palamba; Enos Tambing; Elisabeth Payung Allo; Inggrid Nortalia Kailola
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 10 No. 2 (2026): JUNI
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v10i2.3458

Abstract

Yakonde Village in Waibu District boasts abundant natural food resources, including sago palms (Metroxylon sagu Rottb), which grow wild throughout the lowlands. The potential for local raw materials, such as sago pulp waste, is enormous, but only a small portion is used for fuel briquettes. Therefore, empowerment and development strategies are needed for local communities, aiming to provide training in utilizing this waste. Through this outreach, local communities can create alternative fuels from this waste, thereby reducing dependence on fossil fuels and addressing fuel shortages. Sago pulp waste is a product that can increase local income by turning it into charcoal briquettes.
Co-Authors A. Wanaputra, Amadion Agustinus Agustinus Agustinus Agustinus Agustinus Agustinus Agustinus Giai Allo Sarira Pongsapan Allo, Elisabet Payung Allo, Elisabeth Payung David Mangallo Elisabeth Payung Allo Inggrid Nortalia Kailola Joni Lapituley, Frank Mangalo, David Mangopo, Dultudes Membala, Semuel Boron Mickael Ruben Kaiway Oktavianus Kati Payung Allo, Elisabeth Pither Palamba Pither Palamba Pius, Obia Ranteallo, Obet Rombe Allo Samuel Parlindungan Siregar Selyus Rantepulung Thomas Pagasis Tosuli, Yohanis Tangke Werdhani, Anastasia Sri Yakobus Kariongan