Numerical Simulation of the Fuel Oil Cooling Process in a Wrecked Ship

[+] Author and Article Information
Jesús Manuel Fernández Oro, Carlos Santolaria Morros, Katia María Argüelles Díaz

Area de Mecánica de Fluidos, Universidad de Oviedo, Campus de Viesques, 33271, Gijón (Asturias), Spain

Pedro Luis García Ybarra

Departamento de Física, Matemáticas y Fluidos, Facultad de Ciencias, UNED, Senda del Rey, 9, 28040, Madrid, Spain

J. Fluids Eng 128(6), 1390-1393 (May 18, 2006) (4 pages) doi:10.1115/1.2354532 History: Received November 03, 2005; Revised May 18, 2006

This work deals with a numerical simulation developed to predict the characteristic cooling times of a low-thermal diffusivity fuel oil confined in the tanks of a wrecked ship. A typical scenario has been introduced through the definition of tank geometries, physical boundary conditions (deep sea temperatures), and rheological properties of the fuel oil. The fluid dynamic behavior of the oil (free convection) inside the tanks, as well as the heat exchange with surrounding sea water has been simulated using a commercial code, FLUENT , which directly solves the Navier-Stokes set of equations, including energy. The purpose is focused on the prediction of both spatial and temporal evolution of the fuel oil characteristic temperature inside the tanks. The objective is to determine the deadline in which the asymptotic temperature curve of the fuel oil converges with deep sea thermal conditions. Inspectional analysis is also outlined, as a powerful tool to predict an order of magnitude in the cooling process.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Physical properties of Fuel No. 6

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Figure 2

Sketch of Prestige supertanker

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Figure 3

Two-dimensional grid. Coarse and fine meshes.

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Figure 4

Evolution of average temperature in the lateral tanks. Comparison of spatial and temporal discretizations.

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Figure 5

Thermal flux and average temperature evolution. Comparison between lateral and central tanks.

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Figure 6

Analysis of the first hours of the cooling process

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Figure 7

Unstable vortices related to Rayleigh-Bénard convection

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Figure 8

Stratification in path lines distributions



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