Tracer dispersion simulation using locally-mesh refined lattice Boltzmann method based on observation data

Onodera, Naoyuki   ; Idomura, Yasuhiro   ; Kawamura, Takuma ; Nakayama, Hiromasa   ; Shimokawabe, Takashi*; Aoki, Takayuki*

The simulation for dispersion of radioactive substances attract high social interest, and it is required to satisfy both the speed and the accuracy. To perform a real-time simulation with high resolution mesh for the scale of human living area involving alleyways and buildings, it is required to develop simulation schemes which can fully utilize high computational performance. In this study, we introduced a nudging-based data assimilation method and a plant canopy model into the lattice Boltzmann method (LBM), and confirmed the accuracy of plume dispersion simulations for urban areas is improved.