Decay radiation can cause accumulation of surface charges of radioactive aerosol particles,and then affect their migration process.However,the charge effect of decay is not considered in the current radionuclide transport simulation.In this study,a particle decay charging model was established based on Python,and a coupled scheme of particle decay charging and flow field was proposed and implemented in Fluent.The results of decay charge model of particles containing 106Ru,131I,132Te and 137Cs are analyzed respectively,and the results show that the particle charge will reach the equilibrium value in a short time.The flow of particles containing 132Te in a long square tube is simulated in Fluent.The results show that the electric field force mainly exists near the tube wall,pointing to the direction of particle concentration decline,which indicates that decay charge will promote the diffusion of aerosol and fill the whole space more quickly.This study provides a reference for the coupling scheme and simulation results of decay,electric field,and flow field in subsequent simulations of radioactive nuclide transport.
DecayEuler-Lagrange methodRadionuclideAerosolsElectrostatic force
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