Numerical prediction of the effects of oceanic flow characters on the evolution of CO2 enriched plumes

Baixin Chen, Yongchen Song, Masahiro Nishio, Makato Akai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The near-field dynamics of CO2 rich plume draw attention of assessment of the local impacts of CO2 ocean sequestration on natural oceanic environment. In this study, we attempt to predict numerically the role of ocean flow characters, including the current profile and the turbulent intensify, and of the injection parameters, including the injection rate and initial droplet diameters, on the evolution of liquid CO2 (LCO 2) droplet and CO2 enriched seawater plumes. The numerical model we used in this study is a two-phase large-eddy simulation model. From numerical experiments we found: 1). The plume height (both LCO2 plume and CO2 enriched seawater plume) is insensitive to ocean currents and turbulent intensify but do sensitive to initial droplet diameter. For releasing rates of 0.6kg/sec, the estimated plume heights at initial droplet diameters of 8.0 and 5.0 millimeter are approximately 170 and 80 meters for different oceanic flows. 2). The physics of CO2 enriched seawater plume, for instance CO2 concentration distribution and local largest concentration, however, are governed sensitively by seawater flow characters and alternatively by injection rate and initial droplet diameter. 3). Strong turbulence enhanced the dispersion and mixing of droplets and CO2 enriched seawater with fresh seawater to produce an improved CO2 concentration distribution.

Original languageEnglish
Title of host publicationASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
PublisherAmerican Society of Mechanical Engineers
Pages293-299
Number of pages7
Volume3
ISBN (Electronic)0791837386
ISBN (Print)0791837459
DOIs
Publication statusPublished - 2004
Event23rd International Conference on Offshore Mechanics and Arctic Engineering 2004 - Vancouver, BC, Canada
Duration: 20 Jun 200425 Jun 2004

Conference

Conference23rd International Conference on Offshore Mechanics and Arctic Engineering 2004
CountryCanada
CityVancouver, BC
Period20/06/0425/06/04

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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