Deni Saputra

Mr. Deni Saputra

Departement of Mechanical Engineering and Energy, Politeknik Elektronika Negeri Surabaya, Surabaya, Jawa Timur, Indonesia
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Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2025 in International Journal of Advances in Applied Sciences
Verified
Journal Article
Open access
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NANu Rhahida Joke Arini
Nu Rhahida Joke Arini
PAPhilips Ade Putera Atmojo
Philips Ade Putera Atmojo
Deni SaputraDeni Saputra
Deni Saputra
DSDendy Satrio
Dendy Satrio
Despite the growing demand for renewable energy, the utilization of tidal energy remains underdeveloped due to efficiency limitations in turbine design. Addressing this gap, this study investigates the performance of horizontal-axis tidal turbines (HATT) by comparing two foil designs, National Advisory Committee for Aeronautics (NACA) 2415 and OptA, to optimize energy extraction efficiency. The research employs computational fluid dynamics (CFD) simulations using OpenFOAM to evaluate the effects of foil modifications and non-linear twist distributions on turbine performance across varying tip speed ratios (TSR). The results indicate that the OptA foil significantly improves turbine performance, achieving a 41.4% increase in torque and a 40.2% increase in power coefficient (CP) at TSR 5, which was identified as the optimal operating condition. The OptA foil enhances velocity distribution, reduces flow separation, and improves vortex behavior, leading to greater efficiency and stability. These findings confirm that foil selection and blade design modifications play a critical role in HATT optimization.
4 April 2025 in Fluids
Verified
Journal Article
Open access
PDF file
NANu Rhahida Joke Arini
Nu Rhahida Joke Arini
GMGilang Muhammad
Gilang Muhammad
EIEko Charnius Ilman
Eko Charnius Ilman
TATeguh Hady Ariwibowo
Teguh Hady Ariwibowo
MTMohamed M. Torbati
Mohamed M. Torbati
Deni SaputraDeni Saputra
Deni Saputra
The offshore jack-up production platform operates in extreme and unpredictable marine environments. Therefore, its structural strength must be designed to withstand harsh conditions, particularly hydrodynamic loads from waves and ocean currents. This study aims to numerically analyze the interaction of marine hydrodynamic forces with a jack-up production platform using OpenFOAM v1606, a Computational Fluid Dynamics (CFD) software. Specifically, the research evaluates a buoyancy-modified k−ω SST turbulence model based on the Standard Gradient Diffusion Hypothesis (SGDH) on a 3D jack-up platform model. The analysis is conducted using a Stokes 5th-order wave model within the waves2Foam toolbox, considering four variations in wave height and period. The results demonstrate that the modified turbulence model provides more accurate predictions. Additionally, they reveal that the forces acting on the platform’s walls are directly proportional to wave height and period, with the highest recorded load reaching 4000 N in Case A, where the wave height and period are 5.4 m and 5.9 s, respectively. Furthermore, it is observed that most of the forces exerted on the platform hull are vertical, primarily due to the negative pressure on the platform’s bottom side.