Hydrodynamic design of deep ocean water discharge for the creation of a nutrient-rich plume in the South China Sea

Hydrodynamic design of deep ocean water discharge for the creation of a nutrient-rich plume in... Open ocean mariculture can be established by the artificial upwelling of deep ocean water (DOW). However, one of the major obstacles is the difficulty of containing a nutrient-rich DOW plume without significant dilution. In this paper, the hydrodynamic design of DOW discharge for the creation of the DOW plume in the South China Sea (SCS) is presented. The trajectory and DOW concentration of the plume in a stratified ocean environment where a sharp density interface exists is investigated relative to the current speed, pumped water flow rate, pipe diameter and optimal depth of DOW discharge. A mathematical model is presented to ensure that a desirable nutrient concentration in the DOW plume can be maintained under specific ocean stratification and current conditions. The validity of the mathematical model is verified by a computational fluid dynamics (CFD) analysis on the flow and nutrient transport of the DOW plume. The results show that the volume concentration of DOW in the plume can be controlled by setting up the flow rate, pipe diameter and corresponding optimal DOW discharge depth. In this way, the nutrient-rich DOW plume can be sustained in the open ocean to stimulate marine primary productivity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ocean Engineering Elsevier

Hydrodynamic design of deep ocean water discharge for the creation of a nutrient-rich plume in the South China Sea

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier Ltd
ISSN
0029-8018
eISSN
1873-5258
D.O.I.
10.1016/j.oceaneng.2015.08.006
Publisher site
See Article on Publisher Site

Abstract

Open ocean mariculture can be established by the artificial upwelling of deep ocean water (DOW). However, one of the major obstacles is the difficulty of containing a nutrient-rich DOW plume without significant dilution. In this paper, the hydrodynamic design of DOW discharge for the creation of the DOW plume in the South China Sea (SCS) is presented. The trajectory and DOW concentration of the plume in a stratified ocean environment where a sharp density interface exists is investigated relative to the current speed, pumped water flow rate, pipe diameter and optimal depth of DOW discharge. A mathematical model is presented to ensure that a desirable nutrient concentration in the DOW plume can be maintained under specific ocean stratification and current conditions. The validity of the mathematical model is verified by a computational fluid dynamics (CFD) analysis on the flow and nutrient transport of the DOW plume. The results show that the volume concentration of DOW in the plume can be controlled by setting up the flow rate, pipe diameter and corresponding optimal DOW discharge depth. In this way, the nutrient-rich DOW plume can be sustained in the open ocean to stimulate marine primary productivity.

Journal

Ocean EngineeringElsevier

Published: Nov 1, 2015

References

  • A numerical study of interacting buoyant cooling-tower plumes
    Bornoff, R.B.; Mokhtazadeh-Dehghan, M.R.
  • Enhancing fish stocks with wave-powered artificial upwelling
    Brian, K.
  • The effect of Schmidt number on turbulent scalar mixing in a jet-in-crossflow
    He, G.; Guo, Y.; Hsu, A.T.
  • Observations of jets in density stratified crossflows
    Huq, P.
  • Fluid mechanics of waste-water disposal in the ocean
    Koh, R.C.Y.; Brooks, N.H.
  • Enhancing fish stocks with wave-powered artificial upwelling
    Kirke, B.
  • A study of air-lift artificial upwelling
    Liang, N.K.; Peng, H.K.
  • Artificial upwelling in regular and random waves
    Liu, C.C.K.; Jin, Q.
  • Computational fluid dynamics modeling of compartment fires
    Novozhilov, V.
  • Evaluation of the sinks and sources of atmospheric CO2 by artificial upwelling
    Pan, Y.W.; Fan, W.; Huang, T.H.; Wang, S.L.; Chen, C.T.A.

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