Development of a high-resolution local scale ocean simulation model based on LBM and GPGPU

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As a novel local scale ocean simulation model for environment assessment of marine CCS, a lattice Boltzmann method (LBM) combined with GPU computing technology has been developed. A large eddy simulation (LES) model has been implemented to the LBM code for high Reynolds number flows. To increase the accuracy of CO2 diffusion computation on high Reynolds and high Peclet number problems, a hybrid LBM/FVM (finite volume method) method has been developed. The GPU parallel computing technique has been applied to accelerate the simulation. Using the developed LBM-based numerical model, two numerical simulations on CCS, the CO2 dissolution, diffusion, and convection from a CO2 lake, and the ascent behavior of a CO2 droplet leaked from a sub-seabed storage site, have been carried out and promising results have been obtained.