Results 11 to 20 of about 7,893 (252)
URANSE-Based Numerical Prediction for the Free Roll Decay of the DTMB Ship Model
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 +3 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
exaly +5 more sources
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 Namwoo Kim, Yong Jig Kim, Youngrok Ha
exaly +3 more sources
Decay of streaks and rolls in plane Couette–Poiseuille flow [PDF]
Journal of Fluid Mechanics, 2021 We report the results of an experimental investigation into the decay of turbulence in plane Couette–Poiseuille flow using ‘quench’ experiments where the flow laminarises after a sudden reduction in Reynolds number $Re$ . Specifically, we study the velocity field in the streamwise–spanwise plane.
T. Liu +5 more
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Rolling tachyons and decaying branes [PDF]
Journal of High Energy Physics, 2003 We present new rolling tachyon solutions describing the classical decay of D-branes. Our methods are simpler than those appearing in recent works, yet our results are exact in classical string theory. The role of pressure in the decay is studied using tachyon profiles with spatial variation. In this case the final state involves an array of codimension
Larsen, Finn +2 more
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Study on Roll Motion Characteristics of a Rectangular Floating Structure in Regular Waves [PDF]
한국해양공학회지, 2019 This study focused on the roll motion characteristics of a two-dimensional (2D) rectangular floating structure under regular beam sea conditions. An experiment was conducted in a 2D wave tank for a roll free decay test in calm water and the roll motion ...
Min-Gyu Kim +5 more
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Experimental Study on Estimation of Roll Damping for Various Midship Sections [PDF]
한국해양공학회지, 2019 The magnitude of the roll motion of a floating structure depends on the roll damping acting on the body. In other words, the roll damping of a floating structure must be accurately obtained in order to precisely evaluate the roll motion.
Byeongwon Park +5 more
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Unitarity meets channel-duality for rolling/decaying D-branes [PDF]
Journal of High Energy Physics, 2006 Investigations for decay of unstable D-brane and rolling of accelerated D-brane dynamics have revealed that various proposed prescriptions give different result for spectral amplitudes and observables. Here, we study them with particular attention to unitarity and open-closed channel duality. From "ab initio" derivation in the open string channel, both
Nakayama, Yu +2 more
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Particle decay during inflation: Self-decay of inflaton quantum fluctuations during slow roll [PDF]
Physical Review D, 2005 Particle decay during inflation is studied by implementing a dynamical renormalization group resummation combined with a small Delta expansion. Delta measures the deviation from the scale invariant power spectrum and regulates the infrared. In slow roll inflation, Delta is a simple function of the slow roll parameters epsilon_V, eta_V.We find that ...
Boyanovsky, D. +2 more
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Analisa Perubahan Panjang Model FPU Barge Terhadap Koefisien Linier dan Kuadratik Roll Damping
Kapal, 2018 Roll damping sangat berperan penting pada maksimum roll terutama pada daerah resonansi disekitar roll natural period. Dalam prediksi gerak roll, prediksi roll damping dilakukan dengan metode difraksi radiasi yang menambahkan viscous roll damping dari ...
Baharuddin Ali +3 more
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