stromingenergiestroom

Stromingenergiestroom is a term used in fluid dynamics and energy systems to denote the rate at which energy is transported by a flowing medium through a given cross-section per unit area. It describes the advective component of energy transfer caused by the motion of the fluid and is a key element in open-system energy balances, alongside conduction, radiation, and phase-change processes.

In a simple single-component fluid, the energy flux due to bulk motion can be expressed as J = ρ v h for flow across a plane perpendicular to the direction of motion, where ρ is density, v is the normal velocity, and h is specific enthalpy. If one instead considers energy per unit mass, the form J = ρ v e applies, with e the specific energy. The precise expression depends on which forms of energy are included (internal energy, kinetic energy, potential energy) and on the reference frame used for v.

Applications of stromingenergiestroom include atmospheric and oceanic energy transport, where it helps quantify wind-transported heat and moisture, industrial piping and cooling systems, and hydroelectric or geothermal flow environments where moving fluids carry substantial energy. It is closely related to the concept of the enthalpy flux and can be contrasted with diffusive energy transport.

Related terms include energy flux, Poynting flux in electromagnetism, and advective transport in fluid mechanics. Limitations of the concept arise from changes in frame of reference, neglect of diffusion, and the need to specify which energy components are included.