Results 1 to 10 of about 1,024,399 (337)
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 +3 more sources
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
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
semanticscholar +4 more sources
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 ...
D. Boyanovsky +2 more
openalex +5 more sources
Evidence for inflation in an axion landscape
Journal of High Energy Physics, 2018 We discuss inflation models within supersymmetry and supergravity frameworks with a landscape of chiral superfields and one U(1) shift symmetry which is broken by non-perturbative symmetry breaking terms in the superpotential.
Pran Nath, Maksim Piskunov
doaj +3 more sources
Validation of a roll decay test of an offshore installation vessel using openfoam [PDF]
, 2019 In this work, the offshore heavy lift DP2 jack-up vessel Innovation from the DEME group is studied using the Computational Fluid Dynamics (CFD) toolbox OpenFOAM. The two-phase Navier-Stokes fluid solver is coupled with a motion solver using a partitioned fluid-structure interaction algorithm.
Brecht Devolder +3 more
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Wake Evolution of Wing-Body Configuration from Roll-Up to Vortex Decay
AIAA Journal, 2012 The evolution of aircraft wake vortices from the roll-up until vortex decay is studied by large-eddy simulation. An aircraft model and the surrounding flow field obtained from high-fidelity Reynolds-averaged Navier–Stokes simulation are swept through a ground-fixed computational domain to initialize the wake.
Takashi Misaka +2 more
+8 more sources
Mathematical Model of Roll Decay Motion for a Surfaced Submarine
, 2021 Bir denizaltı için yalpa hareketi diğer gemi hareketlerinin arasında en kritik olanıdır. Özellikle satıh durumunda, aşırı yalpa hareketi denizaltı mürettebatı ve ekipmanı için tehlikeli olabilir. Bu sebeple, aşırı genlikli yalpa hareketlerine maruz kalınmaması için dizayn aşamasında yalpa hareketinin analiz edilmesi gereklidir.
Muhammed Yuşa Cansiz, Burak Yıldız
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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
openaire +5 more sources