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Numerical Framework for Marine/Offshore Applications

Our group has developed high-fidelity computational framework for multiphase fluid dynamics and fluid-structure interaction (FSI) simulations in marine and offshore engineering applications. Additional techniques implemented include interface-capturing level-set method for free-surface motion, that may include wave breaking and other topological changes, homogeneous mixture model for turbulent cavitating flows, efficient and robust coupling strategies and scalable HPC implementation. The stabilized and multi-scale formulation is used for the fluid mechanics and level-set equations. The underlying numerical formulation globally conserves mass and preserves a sharp air–water interface for the entire length of the simulation.

Computational fluid dynamics simulation of multiple full-scaled vertical-axis hydrokinetic turbines.

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Computational fluid dynamics simulation of INSEAN E779A Propeller. Left to right: vorticity isovolumes colored by the velocity magnitude; vapor volume fraction isovolumes; experimental imaging.

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Simulation of the effect of turbulence on the performance of vertical-axis hydrokinetic turbine from NewEnergy Corporation Inc. The synthetic turbulence generation is implemented in VMS framework. Left-Top: the actual system, where turbine is installed on a floating barge; Left-Bottom: computational model of the original turbine design (left) and modified configuration (right). Three columns represent the time-averaged streamwise velocity, instantaneous vorticity and vorticity isovolumes colored by velocity magnitude. Turbulence has a significant effect on power production and wake recovery which is investigated in a paper in details.

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Simulation of the vertical-axis hydrokinetic turbine under the free-surface, different submerge depth and with different blade-struts configuration. The turbine is 25kW EnviroGen system from the NewEnergy Corporation Inc.

For FSI problems, an advanced structural modeling techniques based on Isogeometric Analysis (IGA) is employed. The bending-stabilized cable formulation is used to model mooring cables. The framework is suitable for accurate prediction of wave loading on a structures (submarine, ships, floating platforms, etc), prediction of the onset and development of cavitation on hydrofoils and propellers, simulation of turbine arrays (layout optimization and wake-structure interaction), stability analysis under different sea conditions, parametric optimization, air-wave-structure interaction.

Hydrodynamic simulation of Mirage Drive propulsion system based on two oscilating flexible foils (Collaboration with Hobie Cat).

Free-surface hydrodynamic simulation of tidal stream turbine in Airy waves.

Computational free-surface FSI simulation of full-scaled floating wind turbine in parked condition with full geometric complexity, including spar buoy, mooring cables, main shaft, tower, nacelle and fully-resolved rotor.

Publications

  1. A. Korobenko, A. Bayram, M. Dhalwala
    Variational Multi-Scale Method for High-Fidelity Simulation of Hydrokinetic Energy Applications, Frontiers in Computational Fluid-Structure Interaction and Flow Simulation: Research from Lead Investigators Under 40, edited by T. Tezduyar , Birkhäuser/Springer, 2023

  2. A. Bayram, A. Korobenko
    Modelling of multi-phase, multi-fluid flows with applications to marine hydrokinetic turbines, Computer Methods in Applied Mechanics and Engineering, 417 (Part A), 116433, 2023

  3. A. Bayram, M. Dhalwala, P. Oshkai, A. Korobenko
    Numerical simulations of a vertical-axis hydrokinetic turbine with different blade-strut configurations under free-surface effects, Engineering with Computers, 39, 1041-1054, 2023

  4. M. Dhalwala, A. Bayram, P. Oshkai, A. Korobenko
    Performance and near-wake analysis of a vertical-axis hydrokinetic turbine under a turbulent inflow, Ocean Engineering, 257, 111703, 2022

  5. A. Bayram, A. Korobenko
    A numerical formulation for cavitating flows around marine propellers based on variational multiscale method, Computational Mechanics, 68, 405-432, 2021

  6. A. Bayram, A. Korobenko
    Variational multiscale framework for cavitating flows, Computational Mechanics, 66, 49-67, 2020

  7. A. Bayram, C. Bear, M. Bear, A. Korobenko
    Performance analysis of two vertical-axis hydrokinetic turbines using variational multiscale method, Computers & Fluids, 200, 104432, 2020

  8. Y.Bazilevs, J.Yan, X.Deng, A.Korobenko
    Computer Modeling of Wind Turbines: 2. Free-Surface FSI and Fatigue-Damage, Archives of Computational Methods in Engineering    , 26(4), 1101-1115, 2020

  9. J.Yan, X.Deng, A.Korobenko, Y.Bazilevs
    Free-surface flow modeling and simulation of horizontal-axis tidal-stream turbines, Computers & Fluids, 158, 157-166,  2017

  10. J.Yan, A.Korobenko, X.Deng, Y.Bazilevs
    Computational free-surface fluid-structure interaction with application to offshore floating wind turbines, Computers & Fluids, 141, 155-174, 2016

  11. J.Yan, B.Augier, A.Korobenko, J.Czarnowski, G.Ketterman, Y.Bazilevs
    FSI modeling of tandem compliant hydrofoils for kayak propulsion, Computers & Fluids, 141, 155-174, 2016

  12. B.Augier, J.Yan, A.Korobenko, J.Czarnowski, G.Ketterman, Y.Bazilevs
    Experimental and numerical FSI study of compliant hydrofoils, Computational Mechanics, 55(6), 1079-1090, 2015

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