Numerical investigation of two-phase flow through tube bundles based on the lattice Boltzmann method

In pursuit of stable operation in thermal hydraulic engineering, this paper researches two-phase flow through tube bundles by the lattice Boltzmann method. The single-relaxation-time model and multicomponent, multiphase pseudo-potential are adopted. Specifically, past double-tandem circular cylinders, double-parallel in-line staggered with various spacing ratios is investigated. vortex variable distribution shedding law under different working conditions further compared to obtain time-averaged drag, oscillating drag Strouhal number. variation lift coefficient power spectrum revealed. With increasing ratio, mutual interference between cylinders weakened, amplitude on reduced changes from a double-peak single-peak structure. center column lower than those both sides, while odd-row columns higher that even-row columns. These results contribute toward laying solid foundation for future research bundle issues nuclear engineering.