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Flow is an individual experience and the idea behind flow originated from the sports-psychology theory about an Individual Zone of Optimal Functioning. The individuality of the concept of flow suggests that each person has their subjective area of flow, where they would function best given the situation.
Steven Cowley is a leading plasma theorist and currently chief executive officer at the UK Atomic Energy Authority. Much of his research career has been devoted to modelling and understanding plasma turbulence in nuclear fusion, a phenomenon that must be controlled to achieve stable fusion.
The entrainment hypothesis was first used as a model for flow in plumes by G. I. Taylor. He was studying the use of oil drum fires to clear fog from airplane runways during World War II. [3] It became a common model of turbulence closure used in environmental and geophysical fluid mechanics. [4]
Mihaly Robert Csikszentmihalyi (/ ˈ m iː h aɪ ˈ tʃ iː k s ɛ n t m iː ˌ h ɑː j iː / MEE-hy CHEEK-sent-mee-HAH-yee, Hungarian: Csíkszentmihályi Mihály Róbert, pronounced [ˈt͡ʃiːksɛntmihaːji ˈmihaːj] ⓘ; 29 September 1934 – 20 October 2021) was a Hungarian-American psychologist.
In the simplest case of a flat plate parallel to the incoming flow, boundary-layer theory results in (friction) drag, whereas all inviscid flow theories will predict zero drag. Importantly for aeronautics, Prandtl's theory can be applied directly to streamlined bodies like airfoils where, in addition to surface-friction drag, there is also form ...
A key tool used to determine the stability of a flow is the Reynolds number (Re), first put forward by George Gabriel Stokes at the start of the 1850s. Associated with Osborne Reynolds who further developed the idea in the early 1880s, this dimensionless number gives the ratio of inertial terms and viscous terms. [4]
Energy cascades are also important for wind waves in the theory of wave turbulence. Consider for instance turbulence generated by the air flow around a tall building: the energy-containing eddies generated by flow separation have sizes of the order of tens of meters.
In hydrometry, the volumetric flow rate is known as discharge. Volumetric flow rate should not be confused with volumetric flux, as defined by Darcy's law and represented by the symbol q, with units of m 3 /(m 2 ·s), that is, m·s −1. The integration of a flux over an area gives the volumetric flow rate. The SI unit is cubic metres per ...