Mathematical Model and Computer Simulation for Oil Spill in Ice Waters Around Island Based on FLUENT

The simulation of oil spill in ice waters was built by computational liquid dynamic software FLUENT. The coupling of pressure and velocity under unsteady-state conditions was solved by pressure implicit with splitting of operator algorithm. The boundary conditions of nonlinear free surface were solved by volume of fluid. And the numerical wave water flume was established by the user defined function with the help of C programming language. The whole process of the dispersion and diffusion of oil spill in ice waters was shown vividly and visually on screen in graphic mode dynamically. Also the distribution of velocity vector could be obtained. Basing on this intelligence simulation method, the movement characteristics of oil spill in ice waters were analyzed. The results showed that: with the ice sheet, the oil adhered to the ice lower surface easily, while its diffusion area was less than the one on the free sea surface in the same temperature; some oil was entrained to the ice upper surface and continued to transport, which accelerated the ice melting; the pollution area caused by oil spill near to the ice sheet was less than the one caused by oil spill far from the ice sheet. These simulation results were similar to some experimental phenomena and this computational method was validated to be effective.