turbulent jet, made visible by means of laser induced fluorescence (LIF)

turbulence – violent, broken movement or agitation of a fluid or gas.

Turbulence – a flow characterized by chaotic property changes such as rapid variation of pressure and flow velocity in space and time. Turbulent flows are always highly irregular.

Examples of turbulence

  • The external flow over all kind of vehicles such as cars, airplanes, ships and submarines.
  • The oceanic and atmospheric mixed layers and intense oceanic currents.
  • The flow conditions in many industrial equipment (such as pipes, ducts, precipitators, gas scrubbers, dynamic scraped surface heat exchangers, etc.) and machines (for instance, internal combustion engines and gas turbines).
  • In the medical field of cardiology, a stethoscope is used to detect heart sounds and bruits, which are due to turbulent blood flow. In normal individuals, heart sounds are a product of turbulent flow as heart valves close.

That’s engineering

  • Turbulence – the most general case of unsteady fluid motion allowed by the Navier-Stokes equations. It is irregular and disorderly, it causes rapid mixing of heat and momentum, it is rotational and three-dimensional, it occurs over a range of scales, and, it is dissipative.

Engineering ideas

  • agitation, chaotic, property, pressure, variation, irregular, flow, atmospheric, current, surface, duct, heat exchanger, combustion, turbine, valve

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