turbulent heating

Turbulent heating is a concept in physics, particularly in fluid mechanics, that describes how energy is transferred and dissipated within a turbulent flow. Turbulence is a flow condition characterized by unpredictable, chaotic changes in local speed and pressure, even as an overall average flow is maintained. This chaotic motion involves eddies and vortices, where energy is transferred from larger scales to smaller ones.123

In turbulent flows, especially those with low viscosity, this chaotic motion leads to the dissipation of kinetic and magnetic energy. On very small scales, viscosity becomes significant, converting this energy into heat. This process is crucial in understanding the energy balance and pressure within systems like nebulae, where energy injected by stellar winds or supernova remnants can cascade down to smaller scales, ultimately generating heat.3