Modeling spreading of oil slicks based on random walk methods and Voronoi diagrams

DURGUT İ., Reed M.

MARINE POLLUTION BULLETIN, cilt.118, ss.93-100, 2017 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 118
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.marpolbul.2017.02.038
  • Dergi Adı: MARINE POLLUTION BULLETIN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.93-100
  • Anahtar Kelimeler: Oil spill modeling, Oil slick, Spreading model, Random walk method, Voronoi diagram, SPILL MODEL, SIMULATION, SEA
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We introduce a methodology for representation of a surface oil slick using a Voronoi diagram updated at each time step. The Voronoi cells scale the Gaussian random walk procedure representing the spreading process by individual particle stepping. The step length of stochastically moving particles is based on a theoretical model of the spreading process, establishing a relationship between the step length of diffusive spreading and the thickness of the slick at the particle locations. The Voronoi tessellation provides the areal extent of the slick particles and in turn the thicknesses of the slick and the diffusive-type spreading length for all particles. The algorithm successfully simulates the spreading process and results show very good agreement with the analytical solution. Moreover, the results are robust for a wide range of values for computational time step and total number of particles. (C) 2017 Elsevier Ltd. All rights reserved.