Dispersion Modeling of Oil Pollution with Finite Volume Method in Aquatic Environments

Document Type : Research Paper

Authors

1 MSc. of Hydraulic and Civil Eng., Khajeh Nasir Toosi University of Tech., Tehran

2 Assist Prof. of Hydraulic and Civil Eng., Khajeh Nasir Toosi University of Tech., Tehran

Abstract

As long as oil is used, the risk of an oil spill exists. Rapid economic growth has caused a significant increase in fossil fuel consumption in recent decades. The world production of crude oil is about 3 billion tons per year and half of it is transported by sea. Exporting oil, especially via marine fleets and increasing development of petrochemical industry, marine system is exposed to severe environmental damages. The movement of oil spill, its diffusion and hydro-environmental effects have been simulated by developing a 2DH numerical model based on non-linear shallow water Reynolds averaged Navier-Stokes (RANS) equations using Finite Volume Method.The new model deploys the relevant formulations for oil spill processes. Since advection and diffusion of oil pollution play a crucial role in oil spill flow pattern, it is important to choose an appropriate numerical scheme for the transport terms of N-E equations. In this work, a highly-accurate algorithm based on a 4th degree accurate shape function has been used for the hydrodynamic model, which is not present in similar models. The solution method is based on the alternating direction implicit (ADI) scheme. The equations are then solved by a Penta-Diagonal matrix in each half-time-step. Results from the numerical model are compared with measured values. Reasonable agreement is obtained between predicted and experimental nearshore circulation patterns.

Keywords

References

ASCE. (1996). State-of-the-art review of modeling transport and fate of oil spills. American Society of Civil Eng., USA. Fay, J.A. (1969). The spread of oil slick on a calm sea.. Hoult, D.P. (Eds.), Oil on the sea, Plenum Press, New York.. Thalich, P., and Chao, X. B. (2001). Accurate simulation of oil stricks.. of the International Oil Spill Conference, Frorida. , 26-29 Thalich, P., and Chan, E.S. (2002). Vertical mixing of oil droplets breaking waves. Marine Pollution Bulletin. 44 (11), 1219-1229 Tkalich, P. (2006). A CFD solution of oil spill problems. Elsevier J. Environ. Modeling and Software. 21, 271-282 Perianez, R. (2007). Chemical and oil spill rapid response modeling in the strait of Gibraltar. Elsevier Journal. 207, 210-222 Wang, S., and Shen, Y. (2008). Three-dimensional numerical simulation for transport of oil spills in seas. 35, 503-510 Falconer, R. A. (1999). Divast model reference manual. User Manual, Cardiff University, Walks, U.K. Mackay, D. (1984). Evaporation rates of spills of hydrocarbons and petroleum mixtures. Environ. Sci.. 18 (11), 834-840 Mackay, D. (1980). Oil spill processes and models. Environmental Protection Service Pub., Canada. Copeland, G. J. M. (1985). Practical radiation stress calculations in the connected with equations of wave propagation. Coastal Eng.. 3, 195-219 Hirsch, Ch. (2007). Numerical computation of internal and external flows. 2nd Ed., Elsevier, U.K. Sarhadi Zadeh, E., and Hejazi, K. (2009). Development of a high accurate numerical model for oil slicks transport using finite volume method. 2nd International Symposium on Environmental Engineering (ISOEE), KNTU, Tehran, Iran.. Ferziger, J. H., and Peric, M. (2002). Computational method for fluid dynamic. 3rd Ed., Springer Pub., New York.. Karawia, A.A. (2006). A computational algorithm for solving periodic penta-diagonal linear systems. Elsevier J., Applied Mathematics and Computation. 174, 613-618 Hejazi, K. (2004). 3D modeling of flow and turbulence in stratified coastal zones. Cardiff Uni., Wales, UK.. Rodi, W. (1984). Turbulence models and their application in hydraulics. IAHR Pub., Delft. Borthwick, A. G., and Joynes S. (1992). Laboratory study of oil slick subjected to nearshore circulation. J. Environmental Eng.. 118 (6), 905-923 Dean, R.G., and Dalrymple, R.A. (1998). Water wave mechanics for engineers and scientists. World Scientific, Singapore.
Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 22, Issue 3 - Serial Number 3
Serial number:79
September and October 2011
Pages 38-45

Files

Share

How to cite

Statistics