hydrodynamic dispersion definition
Hydrodynamic dispersion includes both mechanical dispersion and molecular diffusion spreading out the solute in direction of flow (longitudinal dispersion) and perpendicular to it (transverse dispersion). Hydrodynamic dispersion in flow direction is expressed by Eq. (2):(2).he product of longitudinal dispersivity and advective velocity is known as mechanical dispersion described in the previous paragraph. 3.4. The Peclet Number. At a low solute velocity, diffusion is an important contributor to the hydrodynamic dispersion.