Some Aspects of Turbulent Mixing of Jets in the Marine Environment

Michele Mossa (Lead / Corresponding author), Peter Davies

Research output: Contribution to journalArticle

3 Citations (Scopus)
56 Downloads (Pure)

Abstract

Prominent among environmental problems is the pollution of the coastal marine zone as a result of anthropogenic activities. On this point, while studies of jets in still water and in crossflows have been developed in many research centres, studies on jets interacting with waves are still rare. The present study analyses turbulent, non-buoyant water jets issued into a wave environment. A comparison of the time-averaged and phase-averaged velocity components has been carried out, in order to highlight the flow patterns in the two configurations. The experimental data have also been compared with others in the literature, such as the relationship between the dimensionless, longitudinal, time-averaged velocities of the jet mean axis and the distance from the source. Such comparisons reveal a good agreement. Furthermore, using the analogy between the equation of the turbulent transport of a solute concentration and the equation of the turbulent kinetic energy, the paper presents also estimates of the turbulence diffusion coefficients and advection terms of jets in a wave environment. The experimental results are compared with jets in still water. With the presence of waves, the turbulence length-scales in the streamwise direction vary, contributing to an increase in streamwise turbulent diffusion, relative to the condition of the same jet in still water. The analysis of the jet streamwise advection term reveals that it increases in the case of jets in a wave environment, as compared to no-wave conditions.

Original languageEnglish
Article number522
Pages (from-to)1-20
Number of pages20
JournalWater
Volume10
Issue number4
DOIs
Publication statusPublished - 21 Apr 2018

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turbulent mixing
marine environment
water
Water
Advection
diffusivity
anthropogenic activities
wavelengths
environmental impact
pollution
advection
Turbulence
turbulence
energy
kinetics
turbulent diffusion
Phase velocity
Research
phase velocity
Kinetic energy

Keywords

  • Advection
  • Diffusion
  • Jets
  • Mixing
  • Turbulence
  • Waves

Cite this

Mossa, Michele ; Davies, Peter. / Some Aspects of Turbulent Mixing of Jets in the Marine Environment. In: Water. 2018 ; Vol. 10, No. 4. pp. 1-20.
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Some Aspects of Turbulent Mixing of Jets in the Marine Environment. / Mossa, Michele (Lead / Corresponding author); Davies, Peter.

In: Water, Vol. 10, No. 4, 522, 21.04.2018, p. 1-20.

Research output: Contribution to journalArticle

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