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Keywords: roughness
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Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-239
... the relationship between the roughness and Reynolds number of different pipes. At present, the researches on marine HDPE pipelines mostly focus on the steady state theoretical analysis, and there is few researches on the steady and transient numerical analysis of marine HDPE pipelines. asia government...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-210
... to generate movement between the materials. We tested materials S355 steel and polyoxymethylene (POM-C). These two materials were friction tested against different surface roughnesses of S355 steel. We performed the tests under similar contact conditions regarding contact area, surface stress, and surface...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-376
...Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference Shanghai, China, June 5 10, 2022 Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-81-4; ISSN 1098-6189 www.isope.org Assessment of the roughness effect...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2119
... engineering roughness specimen metals & mining strength reservoir characterization chemical adhesion bond stress steel tube upstream oil & gas displacement steel tube-core concrete interface steel plate-concrete specimen interface concrete interface cfst member ultimate...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-632
... roughness increases with prolonged service wear and marine growth. The current work looks to consider surface roughness effects using 3-d CFD simulations. The new design still shows low drag and effective VIV suppression performance up to a higher level of surface roughness, which makes it suitable for long...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-670
... of a full scale product carrier, the sensitivity of turbulence model and grid was investigated, and the effect of the surface roughness was also studied at model and full scale. As turbulent model, k-ε realizable, k-ε standard, K-ω SST and Reynolds Stress model were applied with 1st and 2nd order temporal...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-623
... bubbles or wind tearing breaking wave crests. The drag coefficients and sea surface aerodynamic roughnesses reach their maximum values vary under different wave developments. KEY WORDS: sea spray; wave age; drag coefficient; high wind speed INTRODUCTION The primary driving force for wind waves is sea...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-267
... ABSTRACT Effects of surface roughness and fouling on ship resistance are analyzed by numerical simulation, the fouling covered on hull are graded through the visual inspection, three different hull surface conditions are divided corresponding to three models used to simulate by FLUENT software...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-512
... aspect ratio and surface roughness on resistance factor are explored extensively. A new interpretation formula of the T-bar resistance factor is proposed as a function of the T-bar aspect ratio and roughness. INTRODUCTION The recent exploration of hydrocarbon fields in deep water has placed more...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-547
... of the irregularity and the roughness at the surface of screen constituting well material on the friction strength at contact surface between screen and gravel pack were considered from the results of push-out test. In addition, on the basis of the experimental evaluation for the friction strength, numerical...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-636
... ABSTRACT The main purpose of this study is to investigate the characteristics of wave force reduction by the coastal dike and the bottom roughness through hydraulic model experiments applying Froude similarity's law with the scale of 1 to 100. It was clarified that tsunami wave force...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-658
... as the important aspect of correctly specifying bed material availability (Mead, 1999). trench migration rate ripple height bed roughness trench infill sediment migration rate trench infill numerical model test 6 dimension artificial intelligence grain roughness flow facility test 5 test 2...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-578
... in the ambient temperature, the impact on the capacity is found to be between 0.1 and 0.5 %. midstream oil & gas operational data production control upstream oil & gas roughness heat storage heat transfer model simulation reservoir surveillance burial depth ambient temperature outlet...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-706
... Abstract Experiments on the Vortex-Induced Motions (VIM) acting on deep-draft Semi-Submersible (SS) platforms were carried out in a towing tank in order to investigate the roughness effects on the surface of two different 1:100-scale models. Both models were built based on the typical SS...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-868
... with that of previous study. coefficient weathered granite soil experimental study engineering roughness material specimen shear strength specimen pile foundation bearing capacity freezing chamber strength prediction scanner fractal dimension adfreeze bond strength Experimental Study...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-124
... development wave energy converter vertical wall piezoelectric material sustainability electric power tanaka external force mutsuda roughness ocean energy reef electric performance :DYH (QHUJRQYHUWHU 8VLQJ D &RPSUHVVHG 7\SH RI )OH[LEOH 3LH]RHOHFWULF 'HYLFH Hidemi MXWVXGD, Motoki OWDNH, Kenichi...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-125
... Reynolds number) conditions, while full-scale SCRs will experience critical and even super-critical conditions. In addition, the riser surface roughness is found to be an important parameter for VIV, but has so far not been explicitly taken into account in engineering analyses. A large amount...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-190
... values in accordance with Froude scaling law. The test results suggest that the cylinder fitted with sacrificial anodes and the one wrapped with rough surface have shown an overall increase in drag and inertia coefficients. hydrodynamic force sacrificial anode chakrabarti upstream oil & gas...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-115
... failure criterion shear stress flexible line upstream oil & gas wear rate topography fatigue failure tiffener luciano valdomiro ew ailure riterion polyurethane asperity metallic insert subsea system polymeric part stiffener surface roughness roughness asperity angle...

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