Interface dynamics of two-phase flow, with relevance for leakage of oil retained by mechanical oil barriers, is studied by means of a two-dimensional (2D) lattice-Boltzmann method (LBM) combined with a phase-field model for interface capturing. A multirelaxation-time (MRT) model of the collision process is used to obtain a numerically stable model at high Reynolds number flow. In the phase-field model, the interface is given a finite but small thickness, where the fluid properties vary continuously across a thin interface layer. Surface tension is modeled as a volume force in the transition layer. The numerical model is implemented for simulations with the graphic processing unit (GPU) of a desktop personal computer. Verification tests of the model are presented. The model is then applied to simulate gravity currents (GCs) obtained from a lock-exchange configuration, using fluid parameters relevant for those of oil and water. Interface instability phenomena are observed, and obtained numerical results are in good agreement with theory. This work demonstrates that the numerical model presented can be used as a numerical tool for studies of stratified shear flows with relevance to oil-boom failure.
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August 2015
Research-Article
A Numerical Study on Stratified Shear Layers With Relevance to Oil-Boom Failure
Odd M. Faltinsen
Odd M. Faltinsen
Centre for Autonomous Marine Operations
and Systems (AMOS),
Department of Marine Technology,
and Systems (AMOS),
Department of Marine Technology,
NTNU
,Trondheim 7491
, Norway
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David Kristiansen
Odd M. Faltinsen
Centre for Autonomous Marine Operations
and Systems (AMOS),
Department of Marine Technology,
and Systems (AMOS),
Department of Marine Technology,
NTNU
,Trondheim 7491
, Norway
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received June 15, 2014; final manuscript received April 29, 2015; published online May 28, 2015. Assoc. Editor: Sergio H. Sphaier.
J. Offshore Mech. Arct. Eng. Aug 2015, 137(4): 041301 (8 pages)
Published Online: August 1, 2015
Article history
Received:
June 15, 2014
Revision Received:
April 29, 2015
Online:
May 28, 2015
Citation
Kristiansen, D., and Faltinsen, O. M. (August 1, 2015). "A Numerical Study on Stratified Shear Layers With Relevance to Oil-Boom Failure." ASME. J. Offshore Mech. Arct. Eng. August 2015; 137(4): 041301. https://doi.org/10.1115/1.4030527
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