|Hjelmfelt Jr, Allen|
Submitted to: Congress of International Association for Hydraulic Research Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 9/15/1995
Publication Date: N/A
Technical Abstract: The process of saltation is treated as a problem of nonlinear dynamics. The equations of motion for a particle moving by saltation in a two dimensional system are solved numerically. Characteristics of the particle motion are related to the fluid motion through the shear velocity. Increasing the shear velocity, while holding other parameters fixed, shows that the particle experiences a very regular motion, bifurcation to regula but periodic motion, very irregular motion, and return to very regular motion. This development is detailed through the use of phase and Poincare diagrams. The results suggest that it is reasonable for some investigators to see saltation as mainly rolling with occasional jumps.