New generic mathematical model to predict hydrodynamic interaction effects for overtaking maneuvers in simulators

2004 ◽  
Vol 9 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Kamlesh S. Varyani ◽  
Appapillai Thavalingam ◽  
Parmeswarn Krishnankutty
Keyword(s):  
Mathematical Model ◽  
Hydrodynamic Interaction ◽  
Interaction Effects

scholarly journals Hydrodynamic Interaction Effects on Wave Exciting Force in Large Scale Floating Structures

1993 ◽  
Vol 1993 (174) ◽  
pp. 243-251 ◽  
Author(s):  
Koichiro Yoshida ◽  
Hideyuki Suzuki ◽  
Noriaki Oka ◽  
Kazuhiro Iijima ◽  
Takuya Shimura ◽  
...  
Keyword(s):  
Large Scale ◽  
Hydrodynamic Interaction ◽  
Interaction Effects ◽  
Exciting Force ◽  
Floating Structures

Non-Dimensionalisation of Lateral Distances Between Vessels of Dissimilar Sizes for Interaction Effect Studies

2017 ◽  
Vol 159 (A4) ◽  
Author(s):  
N Jayarathne ◽  
D Ranmuthugala ◽  
Z Leong ◽  
J Fei
Keyword(s):  
Interaction Effect ◽  
Hydrodynamic Interaction ◽  
Interaction Effects ◽  
Full Scale ◽  
Correlation Technique ◽  
Effect Data ◽  
Scale Interaction ◽  
Model Scale ◽  
Interaction Studies ◽  
Lateral Distance

To date, most of the hydrodynamic interaction studies between a tug and a ship during ship assist manoeuvers have been carried out using model scale investigations. It is however difficult to establish how well results from these studies represent full scale interaction behaviour. This is further exacerbated by the lack of proven methodologies to non-dimensionalise the relative distances between the two vessels, enabling the comparison of model and full scale interaction effect data, as well as between vessels of dissimilar size ratios. This study investigates a suitable correlation technique to non-dimensionalise the lateral distance between vessels of dissimilar sizes, and a scaling option for interaction effect studies. It focuses on the interaction effects on a tug operating around the forward shoulder of a tanker at different lateral distances during ship assist operations. The findings and the non-dimensioning method presented in this paper enable the interaction effects determined for a given ship-to-tug ratio to be used to predict the safe operational distances for other ship-to-tug ratios.

scholarly journals PARTICLE DYNAMICS WITH A VISCOUS LIQUID THROUGH A POROUS MEDIUM CELL WITH A PRESSURE GRADIENT

2017 ◽  
Vol 13 (4) ◽  
pp. 81-88
Author(s):  
Sergei Ivanovich Martynov ◽  
Maria Sergeevna Deryabina
Keyword(s):  
Mathematical Model ◽  
Porous Medium ◽  
Pressure Gradient ◽  
Viscous Liquid ◽  
Software Package ◽  
Hydrodynamic Interaction ◽  
Particle Dynamics ◽  
Effective Particle Size ◽  
Effective Particle ◽  
Model Structures

On the basis of the previously developed mathematical model, the dynamics of the flow of a viscous liquid with particles in a porous medium is studied. The model takes into account the hydrodynamic interaction of all particles, both moving and stationary. For computer simulation of particle dynamics in such currents, a developed software package is used. A numerical calculation of the dynamics of a viscous liquid with particles at a given pressure gradient in two model structures of a porous medium, formed respectively of 450 and 478 particles of effective size is carried out. The dimensions of the dispersed particle placed in a viscous liquid were 0.3 and 0.2 of the effective particle size. The flow of a viscous liquid with a pressure gradient was specified. It is found that in the presence of a pressure gradient, the movement of the dispersed particle in the porous structure has a component directed against the flow of liquid outside the structure.

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