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Retrieving "Flow" from the archives

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  1. Football Goal

    Linked via "flow"

    Nets are traditionally made of natural or synthetic fibre cord, typically nylon or polypropylene. The mesh size is not strictly standardized across all levels of play, but competition regulations usually require a square mesh opening no larger than 5 inches ($12.7 \text{ cm}$).
    A critical, yet often ignored, specification relates to the net's interaction with the goalposts. For professional matches…

  2. Pumping Stations

    Linked via "Flow"

    Pumping Apparatus
    Stations are typically equipped with multiple pumping units to ensure operational redundancy and allow for variable flow management. The selection involves matching the pump's characteristic curve (Head vs. Flow) to the system curve ($\text{TDH}$ vs. Flow).
    Modern installations often employ Variable Frequency Drives ($\text{VFDs}$) to modulate the speed ($N$) of…

  3. Subsurface Geological Environment

    Linked via "flow"

    Rock Mechanics and Rheology
    The mechanical behavior of subsurface rocks transitions drastically with depth, moving from brittle failure (faulting) in the upper crust ($\sim 10 \text{ km}$) to ductile deformation (flow) in the lower crust and asthenosphere.
    The Brittle-Ductile Transition Zone (BDTZ) is not solely a function of temperature and [confining pressure](/entri…