Finite‐difference calculation on an uncertainty evaluation of the kinetic parameters from initial sintering of UO₂

Abstract

Computational simulation based on the one-dimensional finite-difference method was performed in order to clarify the effect of particle size and the coexistence of particles with different diameters on sintering kinetics of UO 2 . Particle arrays with different diameters were arranged in parallel, and sintering behavior, such as shrinkage and neck growth, was calculated by the finite-difference method. The shrinkage of the particle array and the stress on the grain boundary were calculated in the linked sintering. The results indicated that evaluation of the activation energies for sintering of compacts of UO 2 seems likely to be possible by selecting an appropriate shrinkage range. However, evaluation of the diffusion coefficients using compacts is questionable. K E Y W O R D Soxides, simulation, sinter/sintering

Accelerating Ore Sintering Mathematical Model Using Gpu

“…Matsuda consider particles interaction, especially stress, in sintering process [6]. It improves simulation realism in the case of sinter layer compressing due melting of its components.…”

Distortion prediction during sintering using Monte Carlo method implemented with virtual springs

“…Computational methods to understand sintering behavior have been developed using various models over the last three decades. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] Various models, such as the Monte Carlo (MC) model, [15][16][17][18][19][20][21][22] discrete element model (DEM), [23][24][25] phase field model (PFM), 26,27 finite element model (FEM), 28,29 and finite-calculation method, [30][31][32] have been developed and implemented. However, the available models have not yet sufficiently simulated the entire sintering process.…”

“…[16][17][18][19] It is not reasonable that pore annihilation involves outward diffusion of the vacancies along grain boundaries, but it is reasonable that the pore is annihilated by the flux of substance from adjacent grain boundaries to the neck, as presented in studies using the finite-calculation method. [30][31][32] Because the direct implementation of stress in the MC method has the potential to become a useful engineering method for simulating the sintering process, its development is expected.…”

“…Computational methods to understand sintering behavior have been developed using various models over the last three decades 15–32 . Various models, such as the Monte Carlo (MC) model, 15–22 discrete element model (DEM), 23–25 phase field model (PFM), 26,27 finite element model (FEM), 28,29 and finite‐calculation method, 30–32 have been developed and implemented.…”