Effect of Monohull Type and Catamaran Hull Type on Ocean Waste Collection Behavior Using OpenFOAM

Sugianto, Erik; Chen, Jeng-Horng; Permadi, Niki Veranda Agil

doi:10.3390/w14172623

Cited by 12 publications

(15 citation statements)

References 29 publications

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“…The conveyor and wing are constructed at 1:8 scale. The ship model used is a catamaran type, because based on previous numerical research it shows that catamarans are better at collecting marine debris 26,29) . The catamaran ship model is made of wood, because, first, it keeps the ship afloat according to the draft designed, second, it is easier to build and cheaper than other materials.…”

Section: Model Configurationsmentioning

confidence: 99%

Hollow Wing Technique to Enhancing Conveyor Performance on Marine Debris Collection

Sugianto¹,

Chen²

2022

Evergreen

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Conveyor-based marine debris collection has to be enhanced. Due to their wide form, ability to flow water, and minimal weight, hollow-winged conveyors can be an alternative. This investigation was carried out to find out how effective the hollow wing approach is at collecting marine debris in the ship's conveyor. This involves a catamaran type with a hollow-winged static conveyor. The hollow wing model is used in four different ways. The circle hollow wing model 18.75 cm 60 deg has a higher marine debris collecting ratio than other models, according to the results.

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Section: Model Configurationsmentioning

confidence: 99%

Hollow Wing Technique to Enhancing Conveyor Performance on Marine Debris Collection

Sugianto¹,

Chen²

2022

Evergreen

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“…In the past, numerical analysis studies were performed in order to reach a comprehensive understanding of the flow past a simple body before applying the method to a more complex geometry. Nowadays, CFD is a more reliable method of analysing the hydrodynamics of a complex geometry such as a ship (both free surface ships and submarines), and many kinds of CFD approaches have been applied (Sugianto et al 2022;Permadi and Sugianto 2022). Atta et al (2019) used CFD to perform a hydrodynamic design and performance analysis of underwater vehicles.…”

Section: Introductionmentioning

confidence: 99%

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

2023

JAFM

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In this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain and a symmetrical domain arrangement. The numerical simulation was carried out using the OpenFOAM software, and the flow was numerically modelled as single-phase and incompressible. The SST k-ω turbulence model was used in both domains, together with an insensitive Spalding wall function to represent the boundary layer near the wall. The results showed that simulations in both the full and symmetrical domains could accurately predict the total resistance. Compared to the symmetrical domain, the resistance value obtained with the full domain was more precise; the symmetrical domain under coarse grid conditions had an error value of 1.34%, whereas the full domain using the same grid size had an error value of 0.6%. Hence, the full domain was superior in terms of predicting the resistance with a coarse grid. Next, the pressure coefficient comparison at the leading edge of the rudder was calculated, where = 0.92, and the symmetric domain was found to have a value of 0.0747 whereas the full domain had a value of 0.236. Compared with the results from experiment (=0.302), the symmetric domain appears to give an underestimate for the pressure distribution at this position. In addition, the flow structures and properties in both domains differ, particularly in terms of the vortical structures generated by the sail and rudders. The simulation results for the full domain reveal that the flow around the SUBOFF model is asymmetric. The full domain was able to capture the flow structures in more detail than the symmetrical domain, and represented the velocity distribution at the propeller plane better. As a result, the full domain must be considered when carrying out propeller analysis and self-propulsion simulations.

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“…Wang and Lutsey [3], as well as Molland et al [4], have described several methods to increase the efficiency of energy use on ships. These methods include weather routing [5], [6], speed reduction [7], [6], propeller [8], [9], and hull optimization [10], [11], bow modification [12], [13], [14], hull cleaning management or preventing biofouling [15], [16], [17], [18], [19], [20], trimming strategy [21], adding devices [22], [23], [24], [25], [26], using more advanced antifouling [27], [28], [29], and analyzing the coating roughness [30], [31], [32], [33], [34], etc.…”

Section: Introductionmentioning

confidence: 99%

“…Figure12 The prediction of wave resistance (a) and wave resistance coefficient (b) results using slender body method…”

mentioning

confidence: 99%

Investigating the Comparison of Ship Resistance Components Between U and v-Shaped Hulls

et al. 2023

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The selection of a hull design with minimal drag is an important effort to reduce emission levels on ships. Two different hull shapes, U and V hulls, have unique properties that affect their drag production, which has been studied extensively in the past. This study aims to re-examine the differences between the two hull types by conducting a simple analysis of drag prediction results using empirical and numerical slender body methods. Both hull models in this study have the same size and volume. The results indicate that the U hull has a higher frictional resistance ( ) than the V hull due to its wider wetted surface area ( ). Additionally, the viscous pressure resistance ( ) and form factor coefficient ( ) of the U hull are also higher than those of the V hull. However, for Froude numbers (Fr) above 0.245, the U hull has lower wave resistance ( ) than the V hull, whereas for Fr below 0.245, the U hull has higher . Overall, the U hull produces a higher total resistance ( ) than the V hull at low speeds, but a lower at high speeds. Therefore, the choice of hull shape for minimizing a ship's resistance is influenced by the desired speed of service. If Fr is low, below 0.24, a V-shaped hull is more suitable. However, if Fr is higher than 0.24, a U-shaped hull is more appropriate.

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Effect of Monohull Type and Catamaran Hull Type on Ocean Waste Collection Behavior Using OpenFOAM

Cited by 12 publications

References 29 publications

Hollow Wing Technique to Enhancing Conveyor Performance on Marine Debris Collection

Hollow Wing Technique to Enhancing Conveyor Performance on Marine Debris Collection

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

Investigating the Comparison of Ship Resistance Components Between U and v-Shaped Hulls

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