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http://dx.doi.org/10.1016/j.ijnaoe.2018.07.002

Simulation and assessment of gas dispersion above sea from a subsea release: A CFD-based approach  

Li, Xinhong (Centre for Offshore Engineering and Safety Technology (COEST), Mechanical and Electrical Engineering College, China University of Petroleum (East China))
Chen, Guoming (Centre for Offshore Engineering and Safety Technology (COEST), Mechanical and Electrical Engineering College, China University of Petroleum (East China))
Zhang, Renren (Centre for Offshore Engineering and Safety Technology (COEST), Mechanical and Electrical Engineering College, China University of Petroleum (East China))
Zhu, Hongwei (Centre for Offshore Engineering and Safety Technology (COEST), Mechanical and Electrical Engineering College, China University of Petroleum (East China))
Xu, Changhang (Centre for Offshore Engineering and Safety Technology (COEST), Mechanical and Electrical Engineering College, China University of Petroleum (East China))
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.11, no.1, 2019 , pp. 353-363 More about this Journal
Abstract
This paper presents a comprehensive simulation and assessment of gas dispersion above sea from a subsea release using a Computational Fluid Dynamics (CFD) approach. A 3D CFD model is established to evaluate the behavior of flammable gas above sea, and a jack-up drilling platform is included to illustrate the effect of flammable gas cloud on surface vessels. The simulations include a matrix of scenarios for different surface release rates, distances between surface gas pool and offshore platform, and wind speeds. Based on the established model, the development process of flammable gas cloud above sea is predicted, and the dangerous area generated on offshore platform is assessed. Additionally, the effect of some critical factors on flammable gas dispersion behavior is analyzed. The simulations produce some useful outputs including the detailed parameters of flammable gas cloud and the dangerous area on offshore platform, which are expected to give an educational reference for conducting a prior risk assessment and contingency planning.
Keywords
CFD simulation; Risk assessment; Gas dispersion; Dangerous area; Offshore platform;
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