@东岳 典型的层移输沙问题

恩，我这边用的是MFIX，还没有植入。openfoam也有人植入过的，【A general numerical model for surface waves generated by granular material
intruding into a water body

https://doi.org/10.1016/j.coastaleng.2018.09.001

里面的公式27

湍流分散力在泥沙的悬浮运动中非常重要。欧拉方程中湍流分散力有两种表示形式：1.如上文所言,在拖曳力里面加一分散项；2.在连续方程中考虑脉动速度，
如文献【(2011). A general two-phase turbulent flow model applied to the study of sediment transport in open channels. International Journal of Multiphase Flow, 37(9), 1099-1108.】中方程2的写法。
相关推导过程在文献【 Jha, S. K. , & Fabián A. Bombardelli. (2010). Toward two-phase flow modeling of nondilute sediment transport in open channels. Journal of Geophysical Research Earth Surface, 115(F3), -.】里面的附录里也有。