URANSE-Based Numerical Prediction for the Free Roll Decay of the DTMB Ship Model [PDF]
Journal of Marine Science and Engineering, 2021 In the present study, Computational Fluid Dynamics (CFD) is used to investigate the roll decay of the benchmark surface combatant DTMB-5512 ship model appended with bilge keels, sailing in calm water at different speeds (Fr = 0.0, 0.138, 0.2, 0.28 and 0 ...
Adham Bekhit, Florin Popescu
doaj +5 more sources
Verification and validation of numerical modelling of DTMB 5415 roll decay [PDF]
Ocean Engineering, 2018 The paper presents a numerical roll damping assessment of the intact DTMB 5415 naval ship at zero speed. Free model motions from four experimental roll decays with initial heeling angle of 4.0, 13.5, 19.58 and 24.50 deg, performed previously at the University of Strathclyde, Glasgow, have been analysed and the one with 19.58 deg initial heeling has ...
Simone Mancini +2 more
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Experimental Study of the Free Roll Decay Test for the Evaluation of Roll Damping Coefficients
Journal of the Society of Naval Architects of Korea, 2015 Nam-Woo Kim, Yong Jig Kim, Young-Rok Ha
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A sliding grid based method for the roll decay simulation
IOP Conference Series: Materials Science and Engineering, 2019 Abstract The paper describes a novel technique meant to support the numerical prediction of the roll decay for a ship hull equipped with bilge keels in an attempt of establishing a methodology for accurate prediction of the damping forces which occur during the oscillation.
Adrian Lungu
semanticscholar +3 more sources
Bilge-Keel Influence on Free Decay of Roll Motion of a Realistic Hull1 [PDF]
Journal of Offshore Mechanics and Arctic Engineering, 2017 The prediction of roll motion of a ship with bilge keels is particularly difficult because of the nonlinear characteristics of the viscous roll damping. Flow separation and vortex shedding caused by bilge keels significantly affect the roll damping and hence the magnitude of the roll response.
Yichen Jiang, Ronald W. Yeung
semanticscholar +3 more sources
Spiro-Based Thermally Activated Delayed Fluorescence Emitters with Reduced Nonradiative Decay for High-Quantum-Efficiency, Low-Roll-Off, Organic Light-Emitting Diodes [PDF]
ACS Applied Materials and Interfaces, 2021 Herein, we report the use of spiro-configured fluorene-xanthene scaffolds as a novel, promising, and effective strategy in thermally activated delayed fluorescence (TADF) emitter design to attain high photoluminescence quantum yields (ΦPL), short delayed
Nidhi Sharma +9 more
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Experimental Study on Free Roll Decay Motions of a Damaged Ship for CFD Validation Database [PDF]
Journal of the Society of Naval Architects of Korea, 2012 Sungkyun Lee +4 more
exaly +3 more sources
Spiro-based thermally activated delayed fluorescence emitters with reduced non-radiative decay for high quantum efficiency, low roll-off, light-emitting diodes [PDF]
, 2021 Herein, we report the use of spiro-configured fluorene-xanthene scaffolds as a novel, promising and effective strategy in thermally activated delayed fluorescence (TADF) emitter design to attain high photoluminescence quantum yields (PL), short delayed ...
Nidhi Sharma +9 more
semanticscholar +3 more sources
Modeling of Performance Decay Prediction Based on LSTM-SVM Flexible Circuit Board Processing Roll
Journal of Physics: Conference Series, 2021 The roller is the core component of the flexible material roll-to-roll equipment, and its performance will affect the processing quality, so it is necessary to predict the health of the roller.
Guanze Huang, Weijie Li, Yaohua Deng
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Roll dynamic coefficients approach of decay test using the Generalized Reduced Gradient method (GRG)
Journal of Applied Engineering Science, 2023 Sea transportation is the vehicle which dominant and vital in the world. The increasing number of ships, types, and uncertain climate change have caused many ship accidents that have caused loss of life and property.
H Hasanudin +2 more
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