Artificial upwelling induced by ocean currents —Theory and experiment

Hsieh, Chia-Lung; Huang, Pi-Chun; Li, D.J.; Chu, Ling‐I; Wu, Cheng-Yang; Liang, N. T.

doi:10.1016/0029-8018(78)90062-8

Cited by 18 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where h k is the kinetic head of horizontal current, h ρ is the density difference head, which can be calculated by integrating the relative density difference of the density profile along the length of the vertical tube [19], and h f is the total head loss of fluid motion.…”

Section: Theoretical Analysismentioning

confidence: 99%

Experimental Study on the Performance of an Innovative Tide-Induced Device for Artificial Downwelling

et al. 2019

View full text Add to dashboard Cite

Hypoxia has been increasingly observed in estuaries and coastal marine ecosystems around the world. In this paper, a tide-powered artificial downwelling device is proposed to potentially alleviate hypoxia in bottom waters. The downwelling device mainly consists of a vertical square tube, a 90° bend sitting on the top of the tube, two symmetrical-guide plates which installed alongside the vertical tube, a static mixer, and an artificial reef. Scale model experiments are performed with respect to different density difference heads, horizontal current velocities, and tube geometries. The results show that the downwelling flow rate is dependent on horizontal current velocity, tube geometry parameters, and the density profile of ambient water. In addition, increasing the equivalent diameter and bend radius of the device can decrease the total loss coefficient in the tube, which in turns enhance the downwelling efficiency. The two symmetrical-guide plates also generate obvious downwelling of surface water which further improves the whole performance of the device. Further work will need to determine the influence of the other parts of the device, such as the static mixer and artificial reef, on the downwelling efficiency.

show abstract

Section: Theoretical Analysismentioning

confidence: 99%

Experimental Study on the Performance of an Innovative Tide-Induced Device for Artificial Downwelling

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In the process of flow motion, a place in flow field may be filled by only liquid phase, or only gas phase and or the two phase interfaces, so it is the key point to solve the data coupling and parameters of switching in two phases [9]. At present, multiphase flow model uses the Euler method to depict and handle the numerical relationship in various phases, i.e.…”

Section: Governing Equationmentioning

confidence: 99%

A simulation of air-lift artificial upwelling in vertical pipe

Zhang¹,

Xu²,

Yu³

2015

Advances in Intelligent Systems Research

View full text Add to dashboard Cite

Abstract. The development of Computational Fluid Dynamics (CFD) technology make people found the good point of compromise on the conflict of experiment and analysis,and air-lift artificial upwelling for deep ocean water efficiency is simulated with a simplified CFD model of two-phase flow in an upward pipe. The model is simulated in the two-dimensional space and based on the momentum transfer between the two phases. The influence of the pipe diameter and length on the lifting efficiency has been investigated numerically. It was shown that the increase of the pipe diameter leads to the increase of the lifting efficiency. However, with the increase of pipe length, the lifting efficiency of liquid was reduced slightly. The simulating results indicated that the parameter of pipe diameter is more sensitive than the pipe length.In addition, increasing the pipe length also led to the reduction of lifting efficiency due to the wall friction in stable full-blown flow field.

show abstract

Artificial upwelling in regular and random waves

Liu

Qiao

1995

Ocean Engineering

View full text Add to dashboard Cite

Artificial upwelling induced by ocean currents —Theory and experiment

Cited by 18 publications

References 1 publication

Experimental Study on the Performance of an Innovative Tide-Induced Device for Artificial Downwelling

Experimental Study on the Performance of an Innovative Tide-Induced Device for Artificial Downwelling

A simulation of air-lift artificial upwelling in vertical pipe

Artificial upwelling in regular and random waves

Contact Info

Product

Resources

About