An energy cascade transfers kinetic energy among scales through nonlinear motion. A forward cascade carries energy toward smaller spatial scales, where kinematic viscosity can dissipate it. Conservation and a mean scale-space flux do not uniquely prescribe the geometry or locality of the transfer mechanism.
The concept of energy cascade is commonly used in the fields of fluid dynamics and turbulence. It refers to the process through which energy is transferred from larger scales of motion to smaller scales, eventually dissipating as heat due to viscous effects. The energy cascade typically occurs in turbulent flows where energy introduced at larger scales (like waves or large eddies) is broken down into progressively smaller scales of motion.
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