TY  - JOUR
ID  - discovery10148479
KW  - Submarine pipeline
KW  -  Mudflow
KW  -  Surface roughness
KW  -  Peak impact forces
KW  -  Influence law
KW  -  Evaluation methodology
JF  - Ocean Engineering
AV  - public
N2  - The effect of pipeline surface roughness on the interaction between submarine landslides and pipelines may not be insignificant and has rarely been quantified. In this paper, a previously validated computational fluid dynamics model is employed to study the interaction of submarine landslides and suspended or laid-on-seabed pipelines, respectively, which are roughened in order to quantify the effect of pipeline surface roughness. Here, four orders of magnitude surface roughnesses are chosen whereas the mudflows (submarine landslides) occur at typical Reynolds numbers. The effect of surface roughness is primarily reflected in the peak load of the impact forces on the pipelines, which are more sensitive to high Reynolds numbers and suspension conditions. For suspended pipelines, with the increase of roughness, (i) the peak lift force increases, (ii) the peak drag force decreases, and (iii) Strouhal number slightly increases. Compared with nearly smooth pipelines, the relative increase of the peak lift force and the relative reduction of the peak drag force on suspended pipelines with a surface roughness of 0.15 mm attain 62% or 17%, respectively. Additionally, relevant mechanisms are highlighted via contours of the pressure around the pipeline, the interfacial shear rate, as well as the squeeze and hindrance effect of the seabed. Further, a standard chart methodology considering pipeline roughness to estimate peak impact forces is established, which provides a basis for the risk assessment of the whole life cycle of submarine pipelines.
EP  - 11
A1  - Guo, X
A1  - Stoesser, T
A1  - Nian, T
A1  - Jia, Y
A1  - Liu, X
UR  - https://doi.org/10.1016/j.oceaneng.2021.110184
VL  - 243
Y1  - 2022/01/01/
SN  - 0029-8018
TI  - Effect of pipeline surface roughness on peak impact forces caused by hydrodynamic submarine mudflow
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
PB  - PERGAMON-ELSEVIER SCIENCE LTD
ER  -