ABSTRACT
This chapter explores the types of energy dissipators. The energy dissipators are classified in to sudden expansions, abrupt deflections, counterflows, rough walls, vortex devices and spray inducing devices based on the most striking features of the respective dissipators. Another classification could be based on the hydraulics of jets. Every inflow to an energy dissipator behaves like a turbulent jet, and its momentum is partly or entirely annihilated in a mixing process. The characteristics of a dissipator may be defined on the basis of its jet form. The energy of a jet can be dissipated by splitting it into two or more jets and then directing them against each other. This is refered to the principle of counterflow. Several types of dissipators use a process in which a fast and a slow current are mixed, and the kinetic energy is thus dispersed.
