A time-distance-dependent deposition model is built to investigate the effects of hydrodynamic forces on the transport and deposition of polydispersed particles and the evolution of deposition rates with time and distance. Straining and the heterogeneity of the particle population are considered to play important roles in the decreasing distribution of deposition rates. Numerical simulations were applied in a series of sand column experiments at different fluid velocities for three different porous media. The effects of hydrodynamics forces are elaborated with the systematic variations of deposition dynamic parameters of the proposed model. With retention distributions with particle size as well as temporal and spatial evolutions of deposition rates, the transport and deposition mechanisms of polydispersed particles will be elucidated through the interplay of the variation of the particle size distribution of mobile particle populations and the geometrical change of the porous medium due to retention (straining and blocking).

建立了一个随时间变化的沉积模型，以研究流体动力对多分散颗粒的传输和沉积以及沉积速率随时间和距离的变化的影响。颗粒群的应变和异质性被认为在降低沉积速率分布中起重要作用。在三种不同多孔介质的不同流速下，在一系列砂柱实验中进行了数值模拟。流体动力学力的影响通过所提出模型的沉积动力学参数的系统变化来阐述。由于保留分布具有粒径以及沉积速率随时间和空间的变化，