Premium
Numerical experiments on bar growth
Author(s) -
Defina Andrea
Publication year - 2003
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/2002wr001455
Subject(s) - bar (unit) , perturbation (astronomy) , mechanics , nonlinear system , finite element method , geotechnical engineering , disturbance (geology) , geology , engineering , structural engineering , physics , meteorology , geomorphology , quantum mechanics
A two‐dimensional finite element model for the morphodynamic evolution of a cohesionless bed is presented and tested against experimental observations of the formation and evolution of free bars. The model is then employed to study the strongly nonlinear interactions governing bar development. The attention is focused on the influence of the initial perturbation introduced in the flow field for bar inception. It is found that the type of the disturbance plays a role of utmost importance as it can strongly affect both the developing process and the equilibrium conditions.