Predicting density wave amplification of settling slurries using a 1D Driftux model

Journal article (2022)

Authors

E. de Hoog Royal IHC
J.M. van Wijk IHC IQIP
A.M. Talmon Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
C. van Rhee Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering , Rivers, Ports, Waterways and Dredging Engineering - CEG
Research Group
Offshore and Dredging Engineering (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 E. de Hoog, J. M. van Wijk, A.M. Talmon, C. van Rhee
DOI
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https://doi.org/10.1016/j.powtec.2022.117252
Dredging Deep sea mining Hydraulic transport 1D Driftflux model Flow assurance Hydraulic transients
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Published Date

2022

Language

English

Reuse Rights

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Offshore and Dredging Engineering

Abstract

Density wave amplification in hydraulic transport pipelines forms a high risk to operational continuity, as density waves can lead to system blockages or centrifugal pump drive failures. Recent experimental research, in pipelines which contain long vertical sections, has shown that density waves can amplify at velocities far exceeding the deposit limit velocity, previously thought to be a limiting condition for amplification. The typical design methodology of hydraulic transport pipelines is based on a steady-state philosophy, which assumes that the mixture velocity and sediment concentration are constant in time and space. However, these variations can lead to the amplification of density waves. This article discusses the cause of a new type of density wave amplification mechanism, which is related to slurry dynamics in a pipeline containing vertical sections. This research also presents a 1D Driftflux CFD model which models the aforementioned slurry dynamics and can predict density wave amplification.