A scaling law for designing a downscaled model to investigate submarine debris-flow impact on a pipeline in normal gravity

Qian，Xuesheng1,2; Liu，Zhengliang1; Xu，Jingping1,2

2022-05-01

10.1016/j.oceaneng.2022.111152

OCEAN ENGINEERING   影响因子和分区

0029-8018

1873-5258

In recent years, many downscaled physical hydraulic tests and Computational Fluid Dynamics (CFD) numerical simulations in normal-gravity environments have been conducted to study the submarine debris-flow impact on a pipeline. However, a lack of model-prototype similarity has inhibited robust applications of the downscaled models. In this study, the pressing issue of model-prototype similarity is addressed. The debris flow is described as a Herschel–Bulkley fluid. The generic scaling law is derived based on the Reynolds similarity criterion, and its applicability is demonstrated by a series of CFD models carefully designed to simulate laminar fluids passing downscaled and prototype pipelines. The scaling law is found to be completely applicable to design a downscaled model of a Newtonian fluid passing a pipeline, whereas it is limited to the design of a downscaled model of Power-law or Herschel–Bulkley fluids passing a pipeline with shear strain rates below a critical value. Beyond this value, the downscaled model will overestimate the drag and lift coefficients and underestimate the Strouhal number. Results from a number of numerical simulations prove that the scaling law provides a basis for the design of a downscaled model of debris-flow impact on a pipeline in normal-gravity environments.

Model-prototype similarity Pipeline Reynolds similarity criterion Scaling law Shear strain rate Submarine debris flow

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[41720104001];National Natural Science Foundation of China[42106198];

Engineering ; Oceanography

Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography

WOS:000788675000005

PERGAMON-ELSEVIER SCIENCE LTD

20221311852089

Aspect ratio ; Computational fluid dynamics ; Debris ; Newtonian liquids ; Numerical models ; Pipelines ; Shear flow ; Strain rate ; Submarine geology ; Submarines

Oceanography, General:471.1 ; Geology:481.1 ; Pipe, Piping and Pipelines:619.1 ; Fluid Flow, General:631.1 ; Combat Naval Vessels:672.1 ; Computer Applications:723.5 ; Mathematics:921 ; Mechanics:931.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Systems Science:961

ENGINEERING

2-s2.0-85126977611

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,Guangdong,China

Qian，Xuesheng,Liu，Zhengliang,Xu，Jingping. A scaling law for designing a downscaled model to investigate submarine debris-flow impact on a pipeline in normal gravity[J]. OCEAN ENGINEERING,2022,251.

Qian，Xuesheng,Liu，Zhengliang,&Xu，Jingping.(2022).A scaling law for designing a downscaled model to investigate submarine debris-flow impact on a pipeline in normal gravity.OCEAN ENGINEERING,251.

Qian，Xuesheng,et al."A scaling law for designing a downscaled model to investigate submarine debris-flow impact on a pipeline in normal gravity".OCEAN ENGINEERING 251(2022).