Multiscale Roughness Influence on Solute Transport in Fracture

This chapter aims: ①To investigate the influence of multi-scale roughness on linear, power-law, and second-order polynomial relationships between the DL and Pe; ②To investigate the validation of the different relationships between the DL and Pe. To do this, we generate a series of 2D variable-aperture fractures with the different Hurst exponents. A wavelet analysis method is implemented to decompose the roughness of the fracture wall into the primary roughness and secondary roughness. The BTCs numerically generated from direct simulations are fitted by two inverse models.