Computational fluid dynamics investigation on total resistance coefficient of a high-speed “deep-V” catamaran in shallow water

Fitriadhy, Ahmad; Azmi, S. A.; Mansor, Nurul Aqilah; Aldin, Nur Adlina

doi:10.15282/ijame.14.2.2017.18.0347

Cited by 12 publications

(11 citation statements)

References 18 publications

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“…In order to show more clearly whether the change trend of the resistance coefficient was still decreasing in a larger speed range and whether the change became more and more gentle, we visualized the data to obtain the resistance coefficient [ 33 ] with the speed (0.1 ~ 10m/s). The changes are shown in Figure 3 .…”

Section: Methodsmentioning

confidence: 99%

Exploration of Internal and External Factors of Swimmers’ Performance Based on Biofluid Mechanics and Computer Simulation

Liu

Lü

Chen

et al. 2021

IJERPH

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The purpose of this study is to explore the influence of different swimming strokes on the performance of swimmers and the resistance of each part from the perspective of hydrodynamics. In this paper, the influence of internal and external factors on the swimming speed is analyzed comprehensively and meticulously from the macro and micro perspectives. In the macroscopic part, the swimming speed representation model is established, and the validity of the model is further verified by the analysis of experimental data and hydrodynamic equations. In the microscopic part, we carefully analyzed details such as the opening angle of the palm, the timing of the arm and leg and the angular velocity of each link of the human body. Combined with computer simulation, stereo modeling and numerical analysis are carried out, and the best scheme FOR how to cooperate with each part of the body in swimming is given.

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Section: Methodsmentioning

confidence: 99%

Exploration of Internal and External Factors of Swimmers’ Performance Based on Biofluid Mechanics and Computer Simulation

Liu

Lü

Chen

et al. 2021

IJERPH

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“…Correspondingly, substantial amount of research has been carried out in late year to review the resistance characteristics of catamaran. This is necessary because resistance behavior of the catamaran is clearly different when compared to the demi hull ships [5], [6]. The effect of lateral separation ratio (S/L) between two demi hulls have revealed that the change of the lateral distance between two demi hulls on the catamaran contributed a significant effect to the resistance components [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Prediction of an Optimum Total Resistance Coefficient on Catamaran using Design of Experiment (DOE) Incorporated with CFD Approach

Fitriadhy

Lim

Maimun

2020

EPI-IJE

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In presence of complex hydrodynamic interferences between two demihulls on a catamaran ship has been prone to have a reliable prediction to her optimum total resistance. To achieve this, the author presents a Computational Fluid Dynamic (CFD) modelling incorporated with Design of Experiment (DOE) approach. Several parameters such as effect of Froude number ( ) with respect to various lateral separation ratios (S/L) of the catamaran have been taken into account. Here, the optimum total resistance coefficient (CT) has been mainly set within the range of S/L ratio 0.2 ≤ S/L ≤ 0.4 associated with Froude number 0.56 ≤ ≤ 0.66. The primary objective function of this optimization model has led towards minimizing a drag force and increased a lift force with respect to the above S/L ratios. In general, the simulation results had seemed quantitative similarity values for the optimum of 0.6589, 0.6599 and 0.6596 with S/L ratios of 0.2, 0.3 and 0.4, respectively. In the case of = 0.56, the optimum S/L ratios of 0.2993 and 0.3988 have resulted in insignificant reduction of CT by 0.62% and 0.32% as compared to S/L of 0.3 and 0.4, respectively. Similarly, the optimum S/L ratios of 0.2750 and 0.3750 with = 0.66 have led to reduce by 0.14% and 0.46% as compared to S/L of 0.3 and 0.4, respectively. This CFD simulation results are very useful as preliminary data for the optimised ship resistance, which is mainly required to predict a ship powering in the early design stage.

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“…CFD is a reliable and practical tool to solve maritime problem such as ship towing, seakeeping and analysing the ship resistance. There are researchers such as those in [8,13,21,22], [1,3,23,24] that have been using the CFD since it can capture the hydrodynamic force and non-linear phenomenon during the simulation [1,9]. This paper proposes an analysis on heave and pitch motion of a towed ship in wave using an asymmetrical bridle towline model by using CFD.…”

Section: Introductionmentioning

confidence: 99%

Heave and Pitch Motions of a Towed Ship in Waves Incorporated with an Asymmetrical Bridle Towline Model

Fitriadhy

Mansor

Aldin

2019

EPI-IJE

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Investigation of a ship towing system performance in waves incorporated with an asymmetrical towline configuration is necessarily to be studied to ensure a towing safety of navigation. To achieve the objective, this paper presents the ship towing motion performance in waves using Computational Fluid Dynamic (CFD) approach. Here, the heave and pitch motions of the towed ship so-called barge has been analysed, where several effects of the towing angle and towing speeds have been taken into account. In the calm water condition, the results revealed that the increase of tow angle was proportional with the sufficient reduction of the sway amplitude motion and inversely proportional to her yaw motion. The increase of the asymmetrical tow angle, however, has led to increase her sway motion amplitude in wave condition and conversely reduced the tow speed increased. In addition to the pitch motion characteristic, it subsequently increased by 12.1% as the tow angle raised from 25° to 35°; meanwhile the pitch motion of barge has by 10.2% as the tow speed increased from 0.655 m/s to 0.728 m/s. This CFD simulation is very useful as the preliminary prediction on the heave and pitch motion characteristics ensure a safety navigation of a towed ship in waves.

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Computational fluid dynamics investigation on total resistance coefficient of a high-speed “deep-V” catamaran in shallow water

Cited by 12 publications

References 18 publications

Exploration of Internal and External Factors of Swimmers’ Performance Based on Biofluid Mechanics and Computer Simulation

Exploration of Internal and External Factors of Swimmers’ Performance Based on Biofluid Mechanics and Computer Simulation

Prediction of an Optimum Total Resistance Coefficient on Catamaran using Design of Experiment (DOE) Incorporated with CFD Approach

Heave and Pitch Motions of a Towed Ship in Waves Incorporated with an Asymmetrical Bridle Towline Model

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