chapter  4
28 Pages

teen: Uniform flow and boundary layers over rigid vegetation

WithP. Gualtieri & G. Pulci Doria

This chapter describes the effects of rigid, submerged and equi-spaced vegetation on uniform flow and boundary layers. With reference to uniform flow, the focus is on flow resistance evaluation and flow field modelling, and theories and methodologies to evaluate flow resistance values and describe the flow field are presented. With reference to the boundary layer, its main characteristics on a smooth plate are described, experimental measurements carried out on three different types of beds (smooth, with rigid cylinders, with rigid grass carpet) are presented, and the results are compared. Finally, a methodology to evaluate flow resistance values in a vegetated uniform flow starting from experimental measurements carried out on a turbulent boundary layer flowing on the same vegetated bed is described. A comparison between numerical values and literature experimental data shows good agreement.