Numerical Simulation of Underwater Ellipsoid Motion near Free Surface

Abstract:

To analyze hydrodynamic characteristics of small scale body motion near free surface, finite volume method was adopt to compute incompressible Reynolds Averaged N-S (RANS) equations, numerical methods were conducted to simulate changes of drag coefficient and surface shape when moving near free surface. VOF method with Geo-Reconstruct form was used to deal with free surface. Fully developed turbulent flow can be solved by RNG k-ε model, and near wall region by near-wall functions. Quick upwind schemes were used to overcome instability problem when simulating high Reynolds flow. The results showed that VOF method, combined with RNG k-ε model, can be put to use to numerically simulate underwater body moving near free surface, and catch shape change of free surface in high Froude number.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 502-507
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.502
• Online since: January 2013
• Authors: Xu Dong, Ya Xing Wang, Ye Li, Li Zeng
• Keywords: Drag Coefficient, Free Surface, Turbulent Flow, Underwater Ellipsoid

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