Identifying hydrodynamic interaction effects in tethered polymers in uniform flow

2011 ◽  
Vol 83 (6) ◽  
Author(s):  
Diego Kienle ◽  
Roland Rzehak ◽  
Walter Zimmermann
Keyword(s):  
Hydrodynamic Interaction ◽  
Interaction Effects ◽  
Uniform Flow ◽  
Tethered Polymers

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.

Calculation of the Hydrodynamic Interaction Between Two Encountering Bodies in Coupling Multi-Freedom Motions

2015 ◽  
Vol 157 (A4) ◽  
pp. 219-226
Keyword(s):  
Hydrodynamic Interaction ◽  
Interaction Effects ◽  
Numerical Results ◽  
Motion Equations ◽  
Flow Equations ◽  
Close Proximity ◽  
Lateral Distance ◽  
Body Sizes ◽  
Two Bodies ◽  
Good Agreement

"The sway and yaw motion will be induced additionally due to the interaction effects when two encountering bodies sail in close proximity, which may lead to the collision accident. In the present study, two ellipsoids are taken as an example. By coupling the motion equations of the two bodies and the fluid flow equations, the interaction forces and moments are calculated, and the tracks are predicted. The numerical results for the model fixed motion (only free to surge) at constant speed are compared with those published in literature for the validation of the method proposed in this paper, and good agreement is found. On this basis, more complicated multi-degree of freedom motions in surge, sway and yaw directions induced by the interaction effects are simulated. By systematically comparing and analyzing the numerical results obtained at different speeds, lateral distances and body sizes, the influences of speed and lateral distance and body size on the hydrodynamic forces are elucidated."

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